Pump and Compressor Manufacturing (U.S.) — An Investor's Primer

NAICS 2022 code 33391, a five-digit "industry" that rolls up two child industries: 333912 Air and Gas Compressor Manufacturing and 333914 Measuring, Dispensing, and Other Pumping Equipment Manufacturing. NAICS is the North American Industry Classification System, the federal scheme for grouping businesses. Figures are the most recent available as of July 2026; forward-looking statements are labeled as judgments, not facts.

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1. Overview

This industry builds the machines that move fluids under pressure. Its two halves split by what the fluid is: compressors (child 333912) squeeze air and gas to a higher pressure so it can do work — run factory tools, push natural gas through a pipeline, feed a chemical reaction — while pumps and dispensers (child 333914) move and meter liquids — the gasoline dispenser on a forecourt, the well pump in a backyard, the centrifugal pump inside a water-treatment plant, the process pumps that circulate oil and chemicals through factories.[3][4]

Why an investor should care: this is foundational infrastructure. Between them, the two children sell into nearly every corner of the physical economy — manufacturing, water and wastewater, oil and gas, power, chemicals, food and beverage, healthcare, fuel retail, and increasingly data centers. That gives the level broad, durable, replacement-driven demand, but also ties it to the industrial and energy capital-spending cycle. And both halves make money the same way: sell the machine once, then sell parts, service, and overhauls against that machine for its working life. Ingersoll Rand puts the average useful life of a compressor at 10–12 years and notes that cumulative aftermarket revenue typically exceeds the original equipment price; pumps run continuously and wear out on a similar logic, with the commercial relationship outlasting the original sale by a wide margin.[3][4][8] That recurring aftermarket stream is the quiet engine of profitability across the whole level.

The single most useful thing to know before investing: there is no large U.S. pure-play "pump and compressor" stock. The economics live inside diversified industrials — most of them own only one slice of this level — plus a large private and foreign-owned tail. The distinctive investment work here is choosing which slice, because the two children differ sharply in who owns them and how you buy in.

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2. What's inside — the two children and how they differ

Both children are essential, fragmented, aftermarket-driven, and lightly regulated at the corporate level but increasingly shaped by federal energy-efficiency rules. The differences that matter to an investor are relative size, the shape of the ownership base, and how many listed ways in each offers.

Read this way: pumps (333914) are the bigger, more publicly investable half — a whole basket of listed industrials to choose from. Compressors (333912) are the smaller half with fewer direct manufacturing plays but a unique listed proxy set (gas-compression fleet operators). The two do not compete with each other — a compressor maker never bids against a fuel-dispenser maker — so treat 33391 as two adjacent product markets sharing a business model, not one competitive arena.

One stock spans both: Ingersoll Rand (NYSE: IR) appears in each child (compressors at its core, plus a growing precision- and industrial-pump line). It is the closest thing to a single-ticker proxy for the whole level, though even IR skews to the compressor side.

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3. How big it is (U.S. federal figures)

Rollup figures for NAICS 33391, from U.S. Census Bureau sources (our ingested ground-truth stats for this level):

Concentration (Economic Census 2022)[1]: top-4 firms 19.9% of revenue, top-8 31.7%, top-20 52.6%, top-50 74.0%. The Herfindahl-Hirschman Index (HHI, a standard concentration measure where below 1,500 is "unconcentrated") is 191.6 — very low.

Why the rollup looks more fragmented than either child. The level's HHI (191.6) sits below both children's (377.8 for compressors, 294.7 for pumps), and its top-4 share (19.9%) is lower than either child's (31.2% and 25.9%). That is an arithmetic artifact of blending two separate product markets: a leader in compressors and a leader in pumps look small when you pool them, even though each is meaningful inside its own market. Real competition happens within each child. Read the child HHIs, not the rollup, when you think about pricing power.[1][3][4]

A note on the arithmetic. Shipments, employment, establishments, and payroll all reconcile cleanly to the sum of the two children ($8.85B + $17.9B ≈ $26.8B; 20,379 + 37,309 = 57,688 workers; 275 + 552 = 827 establishments; $1.70B + $3.12B = $4.82B of annual payroll). Firm counts do not quite add up — the children list 238 + 446 = 684 firms versus 676 at the level — because a handful of companies (Ingersoll Rand is the obvious one) operate in both industries and are counted once at the parent but in each child.[1][2][3][4]

Undercount caveat. These figures measure domestic manufacturing establishments only and understate the opportunity an investor actually cares about in three ways. First, the U.S. is a net importer of both pumps and compressors, so machines sold here exceed machines built here — imports supply an estimated 25–30% of U.S. pump consumption (Mexico the largest single supplier by units, with China and Germany also significant), and independent estimates put the broader global markets far larger: roughly $61B for pumps in 2024 heading toward ~$79B by 2029, $39–43B for industrial air compressors in 2025, and $4–4.7B for fuel dispensers.[4][7][26][28][29] Second, the highest-margin slice — aftermarket parts and service — is only partly captured under a manufacturing code. Third, the foreign-headquartered and diversified leaders book much of their value-add abroad and in adjacent codes (valves, meters, motors, payment terminals, software), so no single Census line reveals their true footprint. Treat the federal numbers as a solid floor on U.S. production, not a ceiling on the market.

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4. The investable universe — where value concentrates across the children

Value concentrates unevenly across the two halves, and the route to it differs.

On the compressor side (333912), listed exposure is thin and indirect. There is no large U.S. pure-play compressor manufacturer. Investors own the category through Ingersoll Rand (IR) — compression at its core, including the former Gardner Denver; its compressor-heavy Industrial Technologies & Services segment turned $6.06B of 2025 revenue at a 28.9% adjusted EBITDA margin — or, for the global leader, Sweden's Atlas Copco, whose Compressor Technique business posted SEK 77.1B of 2025 revenue at a 24.7% operating margin.[3][8][9] A third listed route opened in 2026: Baker Hughes (BKR) completed its acquisition of Chart Industries (including Howden) in July 2026, consolidating large process-gas, LNG, pipeline, and CO₂ compression inside a diversified energy-technology company — which also means Chart itself is no longer a standalone way to own this exposure.[3][13] A separate and uniquely liquid proxy exists downstream: publicly traded firms that operate and rent out gas-compression fleets rather than build them (Archrock (AROC), Kodiak Gas Services (KGS), USA Compression Partners (USAC)). These trade on natural-gas volumes and horsepower utilization, not machine-building margins — a real way to express a U.S. gas thesis, but not a manufacturing bet.[3] Much of the actual manufacturing base is private: family firms like Ariel Corporation (the leader in reciprocating natural-gas compressors, ~$663M revenue and ~856 employees), foreign brands, and private-equity-backed specialists.[3][12]

On the pump side (333914), listed exposure is broad and end-market-sortable. Here the value is spread across a dozen diversified public industrials, which lets an investor target a theme rather than a single stock:[4]

• Water/wastewater: Xylem (XYL), Pentair (PNR), Franklin Electric (FELE)
• Energy & process: Flowserve (FLS), ITT (ITT)
• Specialty fluid handling: IDEX (IEX), Graco (GGG), Nordson (NDSN)
• Fuel dispensers & forecourt systems: Vontier (VNT, home of Gilbarco Veeder-Root), Dover (DOV, home of Wayne)
• Closest dedicated pump stock: Gorman-Rupp (GRC), $682M of 2025 revenue, with no single customer above 10% of sales[20]

The private and foreign tail is large on both sides — Grundfos and Wilo (private, Danish/German water-pump majors), KSB, Sulzer, Ebara, Weir on the pump side; Kaeser, Bauer, and Ariel on the compressor side — which is where private-equity and family-business buyers do most of their work. Several of these are structurally unavailable rather than merely unlisted: Grundfos is 87.9% controlled by the Grundfos Foundation, a deliberately long-horizon ownership structure.[4][36]

(Company-wide revenues for the diversified names span far more than NAICS 33391; they indicate which stocks give the most exposure, not the size of the pump/compressor segment alone. Reserve valuation multiples, yields, and price judgments for security-specific analysis in Section 10.)

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5. How the money works

Across both children the model is the same installed-base / razor-and-blade economics, and the metrics an owner watches are common to the whole level:

• First-fit equipment is the "razor." Selling the machine is competitive and cyclical — engineered-to-order for big compressors and process pumps, more commoditized for small shop compressors and residential pumps. Margins are respectable but move with the capex cycle.
• Aftermarket is the "blade," and it is where durable profit lives — but its intensity varies enormously. Parts, seals, service, overhauls, and long-term care contracts are higher-margin and far more recurring than new-equipment sales. The disclosed evidence spans a wide band: aftermarket was ~53% of Flowserve's 2025 sales (and ~42% of year-end backlog), 40.6% of Ingersoll Rand's Industrial Technologies & Services segment revenue in 2025, and repair parts were $80M of Gorman-Rupp's $682M in 2025.[8][20][21] The children do not report this on a comparable basis, so read the spread as a map of product mix — the more engineered, energy-critical, and downtime-sensitive the installed equipment, the larger the annuity — not as a ranking of quality.
• Bookings, backlog, and book-to-bill (orders ÷ sales; above 1.0 signals growth) are the leading indicators, since large machines are built to order and orders are lumpy. Backlog quality and price-cost coverage matter more than backlog growth alone.[21]
• Price/cost and factory leverage. Steel, iron castings, motors, and electronics are the main inputs; operating and incremental margins, capacity utilization, and lead times reveal pricing power and how tight the plants are. Both Ingersoll Rand and Atlas Copco reported that tariffs diluted 2025 margins — a reminder that input shocks land before repricing does.[8][9] Where segments are disclosed, profitability clusters in a broad band that is not comparable across companies: Ingersoll Rand's ITS at 28.9% adjusted EBITDA and Atlas Copco's Compressor Technique at 24.7% operating margin on the compressor side; ITT's Industrial Process segment at 21.1% operating margin on $1.496B, Dover's Pumps & Process Solutions at 30.3%, and Gorman-Rupp at 14.0% operating margin on the pump side.[8][9][20][23][24]
• Spec-in and switching costs are the moat. Pumps get "specified" into engineering designs and building codes; a dispenser certified for a retailer's payment and safety standards is costly to swap; a compressor's efficiency advantage is worth paying up for because electricity dwarfs purchase price over the machine's life. Designed-in position plus a service network is what keeps the aftermarket annuity attached. The counterweight on both sides: buyers are often sophisticated EPC contractors, municipalities, oil companies, or large industrial operators with real purchasing power.[3][4]
• A pump-side twist — recurring software and payments. Fuel-dispenser makers increasingly sell forecourt software, payment processing, fuel management, and EV-charging services on top of hardware, shifting part of that sub-industry toward higher-margin recurring revenue.[4][30]

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6. What drives demand

Demand is broad because the two children touch different end markets; combined, they give the level unusually diversified, replacement-anchored demand.

• Water and wastewater infrastructure — the single largest pump end market. Aging U.S. systems plus the Infrastructure Investment and Jobs Act (roughly $50B for drinking-water, wastewater, and stormwater) drive pump installation and replacement, and the underlying need is far larger: EPA puts 20-year drinking-water infrastructure needs at $625B and clean-water needs at $630B. Pumps capture only a portion of those totals, but treatment plants, lift stations, conveyance, and stormwater systems are intrinsically pump-intensive.[4][31][32][33]
• Industrial capital spending and manufacturing output — new and expanded factories, chemical plants, and food-and-beverage lines buy both compressed air and process pumps. This is the broad cyclical base for both children.[3][4]
• Energy-sector capital spending — natural-gas production, gathering, processing, transport, and storage need compression; upstream and midstream activity needs heavy-duty and oil-field pumps. This is the most cyclical swing factor and tracks oil and gas prices.[3][4]
• LNG and gas infrastructure build-out — liquefied-natural-gas (LNG) export expansion is a multi-year driver for large gas-compression equipment.[3][7]
• Data centers and AI — a fast-growing new pull on both halves: AI-driven construction lifts industrial and utility capex broadly (U.S. utilities alone are forecast near $1.3 trillion of capex in 2026–2030), and dense server racks specifically need precision liquid-cooling pumps, a small niche forecast to grow ~20%+ a year.[3][34][35] (Judgment: the theme is real but easily overstated — compressors are a small slice of any data-center bill of materials, and the children's company filings show data centers contributing to growth, not dominating revenue.)
• Energy-efficiency replacement — because pumps and (especially) compressors are large electricity consumers, tightening standards and high power prices push customers to replace old fixed-speed units with efficient variable-speed models; DOE describes typical compressed-air system efficiency as only 10–15%, and variable-speed-drive machines can cut energy use by up to ~35%.[3][4][14]
• Fuel retail dynamics (pump side only) — number of fueling sites, store remodels, and regulatory replacement mandates drive dispenser demand; long-run electric-vehicle adoption is a headwind offset by EV-charging hardware and forecourt software.[4][30]

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7. Regulation

Both children are lightly regulated at the corporate level; the binding rules are federal energy-efficiency standards plus, uniquely on the pump side, fuel-dispenser accuracy and payment rules.

• DOE efficiency standards (both children), now on a staggered schedule. The U.S. Department of Energy (DOE) set minimum efficiency standards for commercial and industrial pumps (effective for pumps made on or after January 27, 2020; 10 CFR 431.465), for certain rotary air compressors (2020 final rule, binding on units manufactured or imported starting January 10, 2025, with an updated test procedure in 2025), and for circulator pumps (standards effective 2024, compliance required from May 22, 2028). Together these stretch the efficiency-driven replacement runway across the rest of the decade. One caveat worth carrying: DOE's compressor rule does not cover every product classified in NAICS 333912 — coverage is determined model by model.[3][4][15][16][17]
• Weights and measures — fuel (pump side). Retail motor-fuel dispensers must meet accuracy specifications in NIST Handbook 44, enforced by state inspectors who seal pumps.[4][18]
• Payment security — "EMV at the pump" (pump side). The card-network liability shift for automated fuel dispensers took effect April 2021, forcing retailers to install chip-capable ("EMV," for Europay-Mastercard-Visa) dispensers — a multi-year replacement wave for dispenser makers.[4][19]
• Product-safety, pressure-vessel, and environmental codes (both). ASME pressure codes, UL hazardous-location listings, EPA vapor-recovery, containment, and Clean Air rules, Safe Drinking Water "lead-free" requirements, and OSHA workplace rules shape product design. Machines sold into oil and gas also inherit that sector's methane and emissions rules, which increasingly favor electric-drive, lower-emission compression.[3][4]
• Trade policy (both). Tariffs on imported pumps and compressors (including Section 301 duties on Chinese goods) affect sourcing and pricing given 25–30% import penetration on the pump side, and both Ingersoll Rand and Atlas Copco flagged tariff-driven margin dilution in 2025.[4][8][9][28]

Net effect: efficiency regulation is more a demand catalyst for incumbents (who lead on efficient designs) than a cost burden.

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8. Competitive dynamics & consolidation

Both children behave like a tiered structure with a leading group up top and a long private tail — even though the federal HHIs read "unconcentrated." Consolidation is the defining trend across the whole level, and the strategic logic is identical on both sides: own more of the aftermarket, because service annuities are worth more than one-time machine sales.

• Compressor side (333912): Ingersoll Rand's 2020 combination with Gardner Denver created its current scale, followed by a steady program of bolt-on acquisitions of small manufacturers and independent service businesses. Honeywell's 2025 purchase of Sundyne, Hitachi's ownership of Sullair, and Baker Hughes's completed July 2026 acquisition of Chart Industries (including Howden) show large industrials absorbing specialized compressor lines.[3][13]
• Pump side (333914): IDEX, Ingersoll Rand, and Dover are habitual acquirers of specialty pump and fluid-handling businesses; Xylem bought Evoqua for $7.5B in 2023 to scale water treatment; Vontier was spun out of Fortive in 2020 to house Gilbarco Veeder-Root; Dover acquired Wayne Fueling Systems in 2016.[4][25]

The one deal that crossed the line between the children has now resolved. Flowserve and Chart Industries announced a ~$19B all-stock "merger of equals" in June 2025 that would have built a pump-anchored process-technology leader; it was terminated the next month after Chart pursued a competing Baker Hughes bid, and that bid closed in July 2026. The asset therefore ended up on the compressor/energy side of the level rather than the pump side — a useful reminder that the boundary between these two children is a real commercial boundary, not just a statistical one.[4][13][22]

Barriers to entry are moderate: engineering know-how, a service network, and an installed base are hard to replicate for large machines, but low-end air compressors and commodity pumps face import competition, notably from Asia and Mexico.[3][4]

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9. Risks

• Cyclicality — diversified rather than absent. New-equipment demand across both children swings with manufacturing, construction, and especially energy capex; a downturn hits bookings and factory utilization together. But the end markets do not move in lockstep: Gorman-Rupp's 2025 construction sales fell 11.1% while its industrial, fire, municipal, agriculture, petroleum, OEM, and repair-parts sales grew.[20] Aftermarket cushions but does not eliminate the cycle.
• Energy-sector exposure. Gas-compression and oil-field-pump demand rise and fall with commodity prices and producer discipline; a prolonged low-price period defers projects.[3][4]
• Input-cost inflation and tariffs. Steel, castings, motors, and electronics drive cost of goods; margins depend on passing increases through faster than competitors, and both leading compressor makers reported tariff dilution in 2025.[8][9]
• Import competition pressures commodity-grade air compressors and pumps at the low end; engineered applications are better protected by specifications, certification, service access, and the cost of failure.[3][4][28]
• Limited U.S. pure-play access. Foreign-headquartered leadership (Atlas Copco, Grundfos, Wilo, KSB) and diversified structures mean investors get the theme diluted inside multi-segment companies and inherit currency/governance considerations abroad.
• Technology transitions. Failure to lead on variable-speed, oil-free, digital-monitoring, and (on the fuel side) EV-charging/software risks losing premium share; tightening standards can strand older product lines.
• Substitution (compressor side). Electric actuators can replace pneumatic motion, blowers can replace compression in low-pressure duties, and better system design eliminates leaks and oversized machines — though the same efficiency audits often trigger controller, dryer, and replacement-equipment sales.[3]
• EV transition (pump side). Long-run electrification erodes gasoline-dispenser volumes; the offset depends on capturing EV-charging and forecourt-software spend, and hydrogen, renewable fuels, and higher ethanol blends require compatible metering and containment rather than no dispensing equipment at all.[4][30]
• Customer/project concentration. Engineered-pump and gas-compression revenue can be lumpy and tied to a few large producers, pipelines, or municipalities.
• Supply chain and skilled labor. Some engineered castings, motors, and components remain single-sourced, lengthening lead times; both children depend on machinists, welders, foundry workers, and field-service technicians whose scarcity shows up as longer lead times and warranty cost.[3][4][8]

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10. How to invest & the outlook

Match the vehicle to the thesis — the two children ask for different tools.

• For broad compression exposure: Ingersoll Rand (IR) is the most direct large-cap U.S. way to own compressor manufacturing plus its aftermarket flywheel, and it doubles as the only listed name that also spans the pump side; note its ITS segment is not a pure NAICS 333912 business (it also includes vacuum, blowers, air treatment, tools, and lifting). Atlas Copco offers the global leader, with unusually good segment-level disclosure, for investors comfortable with a foreign listing.[3][8][9]
• For process-gas, LNG, and energy-transition compression: Baker Hughes (BKR), following its July 2026 acquisition of Chart Industries (including Howden) — accepting substantial energy-services, project, and integration exposure alongside it.[3][13]
• For a U.S. natural-gas thesis specifically: the gas-compression service operators — Archrock (AROC), Kodiak Gas Services (KGS), USA Compression Partners (USAC) — track fleet utilization and gas volumes rather than machine margins. (USAC's partnership structure has distinct tax treatment.)[3]
• For pumps, pick the end market: Xylem, Pentair, Franklin Electric for water; Flowserve, ITT for energy/process; IDEX, Graco, Nordson for specialty fluid handling; Vontier, Dover for fuel dispensers and forecourt systems; Gorman-Rupp as the closest dedicated pump stock. Broad industrial and water-focused ETFs also hold these names. Compare them on pump-related organic growth, aftermarket mix, price-cost realization, backlog quality, and segment return on capital rather than consolidated multiples — reported segment margins are routinely flattered by non-pump products.[4]

Private routes (both children). The manufacturing tail is mostly private — family firms, foreign subsidiaries, and PE-backed niche builders. The fragmented, aftermarket-rich structure suits buy-and-build: service-and-parts roll-ups (aggregating independent compressor and pump service shops into recurring-revenue platforms) and specialty manufacturers in high-value niches (high-pressure or oil-free compression; water, dewatering, or new-molecule pumping). Underwriting on both sides turns on the same checks — verify the installed base rather than the brand, measure technician density and retention, identify who owns the distributor relationship, and confirm the target actually manufactures equipment in the code rather than distributing or servicing product made elsewhere.[3][4]

Near-term drivers (forward-looking judgment, not fact).

1. Water infrastructure and industrial/reshoring capex support the larger pump half, with data-center liquid cooling as an emerging kicker.[4][31][34]
2. LNG, gas infrastructure, and new-molecule projects (hydrogen, CO₂, renewable natural gas) support the compressor half, balanced against the ordinary oil-and-gas cycle — and none of these is an effortless substitute, since their purity, pressure, and sealing requirements demand new engineering.[3][7]
3. A staggered DOE replacement runway — 2020-and-later pumps, 2025-and-later compressors, and 2028-and-later circulator pumps — should keep pulling old fixed-speed fleets out of service, favoring incumbents with efficient lineups.[15][16][17]
4. Aftermarket monetization (care contracts, digital monitoring, forecourt software) is the margin story to watch across both children. Ingersoll Rand exited 2024 with roughly $300M of contracted "care" revenue against a stated aspiration of $1 billion by 2027 — a target to track, not a result.[10][11]

Bottom line: a steady, cash-generative industrial level with two adjacent halves — a larger, broadly investable pump-and-dispenser business anchored in water and fuel retail, and a smaller compressor business levered to industrial air and natural gas. Both share a genuine recurring-revenue moat in the aftermarket, though its intensity varies widely by product mix; both carry energy cyclicality and limited U.S. pure-play access as their main caveats. Independent forecasts put mid-single-digit annual growth (roughly 4–6%) on both underlying markets through the end of the decade — steady and replacement-anchored rather than explosive, and a projection, not a promise.[7][27]

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Sources

1. U.S. Census Bureau, 2022 Economic Census — receipts, firm count, and concentration ratios (CR4/CR8/CR20/CR50) and HHI for NAICS 33391 and children 333912/333914. (Histometrics ingested federal statistics.)
2. U.S. Census Bureau, County Business Patterns 2023 — establishments, employment, and annual/first-quarter payroll for NAICS 33391/333912/333914. (Histometrics ingested federal statistics.)
3. Histometrics child primer — NAICS 333912, "Air and Gas Compressor Manufacturing (U.S.)."
4. Histometrics child primer — NAICS 333914, "Measuring, Dispensing, and Other Pumping Equipment Manufacturing (U.S.)."
5. U.S. Small Business Administration, "Table of Small Business Size Standards" (NAICS 333912 — 1,000 employees; NAICS 333914 — 750 employees), 2023. https://www.sba.gov/document/support-table-size-standards
6. IBISWorld, "Air & Gas Compressor Manufacturing in the US — Industry Analysis," 2025. https://www.ibisworld.com/united-states/industry/air-gas-compressor-manufacturing/5643/
7. Mordor Intelligence, "Industrial Air Compressors Market Size & Share Analysis," 2025. https://www.mordorintelligence.com/industry-reports/industrial-air-compressors-market
8. Ingersoll Rand Inc., "2025 Form 10-K," SEC EDGAR. https://www.sec.gov/Archives/edgar/data/1699150/000162828026008617/iri-20251231.htm
9. Atlas Copco Group, "Annual Report 2025." https://www.atlascopcogroup.com/content/dam/atlas-copco/group/documents/investors/financial-publications/english/20260320-annual-report-2025-incl-sustainability-report-and-corporate-governance-report-copy-of-the-official-ESEF-format.pdf.coredownload.pdf
10. Barchart, "IR Q4 Deep Dive: Recurring Revenue and M&A Drive Growth," 2025. https://www.barchart.com/story/news/211024/
11. Umbrex, "Ingersoll Rand Strategy and Business Model," 2025. https://umbrex.com/resources/company-profiles/ingersoll-rand/
12. RocketReach / Ariel Corporation, "Ariel Corporation Company Information," 2025. https://rocketreach.co/ariel-corporation-profile_b5c62855f42e0ca1
13. Baker Hughes, "Baker Hughes Completes Acquisition of Chart Industries," July 2026. https://investors.bakerhughes.com/news/press-releases/news-details/2026/Baker-Hughes-Completes-Acquisition-of-Chart-Industries/default.aspx
14. U.S. Department of Energy, "Compressed Air Tip Sheet #1." https://www.energy.gov/sites/default/files/2014/05/f16/compressed_air1.pdf
15. U.S. Department of Energy / Federal Register, "Energy Conservation Standards for Air Compressors" (final rule 2020; test-procedure update 2025). https://www.federalregister.gov/documents/2020/01/10/2019-26355/energy-conservation-program-energy-conservation-standards-for-air-compressors
16. U.S. Department of Energy / Federal Register, "Energy Conservation Standards for Commercial and Industrial Pumps" (10 CFR 431.465; effective January 27, 2020). https://www.federalregister.gov/documents/2022/08/11/2022-17074/energy-conservation-program-energy-conservation-standards-for-commercial-and-industrial-pumps
17. U.S. Department of Energy, "Circulator Pumps — Energy Conservation Standards" (effective 2024; compliance May 22, 2028). https://www.energy.gov/cmei/buildings/circulator-pumps
18. National Institute of Standards and Technology (NIST), "Handbook 44 — Retail Motor-Fuel Dispensers." https://www.nist.gov/pml/owm/pages-topic/gasoline-dispensers
19. Convenience Store News / Conexxus, "EMV at the Pump — Automated Fuel Dispenser Liability Shift (April 2021)," 2020–2021. https://csnews.com/c-stores-must-ready-themselves-emv-2020
20. Gorman-Rupp Company, "Form 10-K, Fiscal Year 2025," 2026. https://www.sec.gov/Archives/edgar/data/42682/000119312526084820/grc-20251231.htm
21. Flowserve Corporation, "Form 10-K, Fiscal Year 2025," 2026. https://www.sec.gov/Archives/edgar/data/30625/000003062526000003/fls-20251231.htm
22. Flowserve Corporation, "Flowserve Corporation Terminates Merger with Chart Industries," 2025. https://ir.flowserve.com/news-events/news-details/2025/Flowserve-Corporation-Terminates-Merger-with-Chart-Industries/default.aspx
23. ITT Inc., "Form 10-K, Fiscal Year 2025" (Industrial Process segment ~$1.496B, 21.1% operating margin), 2026. https://www.sec.gov/Archives/edgar/data/216228/000021622826000012/itt-20251231.htm
24. Dover Corporation, "Form 10-K, Fiscal Year 2025" (Pumps & Process Solutions segment 30.3% margin; data-center cooling demand), 2026. https://www.sec.gov/Archives/edgar/data/29905/000002990526000009/dov-20251231.htm
25. Xylem Inc., "Xylem Completes Acquisition of Evoqua in $7.5 Billion Transaction," 2023. https://www.wwdmag.com/wastewater-treatment/press-release/33005632/xylem-completes-acquisition-of-evoqua-in-75b-transaction
26. MarketsandMarkets / GlobeNewswire, "Pumps Market Global Forecast to 2029 — $61.3B (2024) to $79.01B (2029)," 2025. https://www.globenewswire.com/news-release/2025/01/08/3006381/28124/en/Pumps-Market-Global-Forecast-to-2029-with-Grundfos-Xylem-Flowserve-KSB-and-Sulzer-Dominating-the-79-Billion-Industry.html
27. IndexBox, "United States Packaged Pump Systems Market — size, forecast (mid-single-digit growth)," 2025. https://www.indexbox.io/store/united-states-packaged-pump-systems-market-analysis-forecast-size-trends-and-insights/
28. IndexBox, "United States' Pumps for Liquids Market — imports, suppliers (Mexico, China, Germany), import penetration," 2024. https://www.indexbox.io/blog/pumps-for-liquids-united-states-market-overview-2024-4/
29. Mordor Intelligence, "Fuel Dispenser Market Size, Share & Growth Trends Report," 2025. https://www.mordorintelligence.com/industry-reports/fuel-dispenser-market
30. Vontier Corporation (NYSE: VNT) investor materials and Gilbarco Veeder-Root profile, 2025. https://finance.yahoo.com/quote/VNT/
31. GlobeNewswire, "United States Submersible Pumps Industry Report 2025 — water-infrastructure upgrades, IIJA (~$50B), irrigation, and oil & gas demand," 2026. https://www.globenewswire.com/news-release/2026/02/24/3243241/0/en/United-States-Submersible-Pumps-Industry-Report-2025.html
32. U.S. Environmental Protection Agency, "EPA's 7th Drinking Water Infrastructure Needs Survey and Assessment," 2023. https://www.epa.gov/dwsrf/epas-7th-drinking-water-infrastructure-needs-survey-and-assessment
33. U.S. Environmental Protection Agency, "Clean Watersheds Needs Survey," 2022. https://www.epa.gov/cwns
34. MarketsandMarkets / Dataintelo, "Data Center Liquid Cooling Pumps Market — ~$1.4B (2024), ~20%+ CAGR," 2025. https://www.marketsandmarkets.com/PressReleases/data-center-pumps.asp
35. S&P Global Market Intelligence, "Surging Energy Demand Puts US Utility Capex Forecast Near $1.3T in 2026–30," 2026. https://www.spglobal.com/market-intelligence/en/news-insights/research/2026/04/surging-energy-demand-puts-us-utility-capex-forecast-near-1-3t-in-2026-30
36. Grundfos, "Who We Are — Ownership," 2025. https://www.grundfos.com/us/about-us/who-we-are