Gast vacuum pumps: independent brand profile
Gast, from Benton Harbor, Michigan, makes the small rotary vane and diaphragm pumps found inside medical devices, lab benches and composites shops. It is one of the few industrial vacuum brands that hobbyists talk about by name. This profile collects that discussion, checks what AI assistants say about Gast’s founding, and compares search interest.
Independent profile by Vacuum Engineering Tools. We are not affiliated with Gast, receive no payment and do not sell pumps. Quotes are the opinions of individual users, not statements of fact by us. Brand names belong to their respective owners.
In short
Gast Manufacturing (Benton Harbor area, Michigan, USA) was founded in 1921 by L.L. Tirrell, W.H. Gast and H.E. Howard. It started out making insecticide sprayers for fruit trees and built its first high-speed air pump in 1929. Part of IDEX Corporation since 1998, it makes oilless and lubricated rotary vane, diaphragm, rocking piston and regenerative products, largely for OEMs. On Reddit, composites and lab users recommend Gast as a pump that can run for hours, and “relatively cheap and powerful enough for most bench work”.
Verified facts
- Parent company
- IDEX Corporation (since 1998) [Source]
- Founded
- 1921 by L.L. Tirrell, W.H. Gast and H.E. Howard [Source]
- Origins
- Insecticide sprayers for fruit trees; first high-speed air pump in 1929 [Source]
- Location
- Benton Township near Benton Harbor, Michigan (plant since 1955) [Source]
- Acquisition
- JUN-AIR quiet compressors (2006) [Source]
What users say
Gast has the strongest Reddit presence in this group, almost entirely among hobbyists and lab staff. In r/CarbonFiber and r/Composites it is the standard recommendation for vacuum bagging and infusion when a cheap pump will not run for hours. In r/labrats it is the budget bench pump: cheap and strong, but louder than premium alternatives.
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A vacuum pump for a vacuum infusion
“You would be better off to look into a Thomas or a Gast Vacuum pump. You need a pump that can run for hours, not for minutes.” Google preview
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Suggestions for a bench vacuum pump?
“Small Gast pumps are relatively cheap and powerful enough for most bench work. If you want quieter, the price tends to spike dramatically ...” Google preview
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Building out Gast vacuum (DAA-P501-EB)
“The diaphragm pump doesn't need an exhaust filter to capture oil mist as oil seal pumps, but it could help keep dirt out of the mechanism.” Google preview
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Vacuum pump suggestions
“Get a Gast vacuum pump.” Google preview
- Help Needed - Wiring Gast Vacuum Pump
Reddit blocks automated access, so thread titles, links and previews come from Google’s index of reddit.com (October 2026). Previews are excerpts, not the full comment.
From specialist forums
Beyond Reddit, Gast pumps mostly appear as OEM components and surplus finds. Their long production runs mean used units and rebuild kits are easy to come by.
No quotable forum posts found.
AI fact-check: what ChatGPT, Gemini, Perplexity and Claude say
On 9 October 2026 we asked all four assistants the same question (who owns Gast, headquarters, founding, best-known series and what buyers say) and checked every answer against the manufacturer’s own pages.
| Question | ChatGPT (gpt-5.5) | Gemini (3.5 Flash) | Perplexity (Sonar) | Claude (Sonnet 5.5) | Verified |
|---|---|---|---|---|---|
| Who owns it? | ✓ IDEX Corporation | ✓ IDEX Corporation | ✓ IDEX (Health & Science Technologies) | ~ IDEX, “acquired in 2007” | IDEX Corporation, since 1998 [Source] |
| Headquarters | ✓ Benton Harbor, Michigan | ✓ Benton Harbor, Michigan | ✓ Benton Harbor, Michigan | ✓ Benton Harbor (flagged) | Benton Harbor area, Michigan [Source] |
| Founded | ✗ 1921, “M.D. Gast” | ✗ 1921, “Wally Gast” | ✓ 1921, Tirrell, W.H. Gast and Howard | ✗ 1921, “Howard Gast” | 1921, L.L. Tirrell, W.H. Gast and H.E. Howard [Source] |
| Series named | ✓ 0523, 0823, DOA | ✓ 23 Series, 82R, ROA | ~ 2D1034, 3D1060, 10D1110 | ✓ 0523/0823, DOA, AA/AB | Rotary vane, diaphragm, rocking piston and regenerative ranges [Source] |
✓ correct · ~ partly right or outdated · ✗ wrong · ? cannot be checked against an official source. Answers condensed. Only Perplexity used web search; the other models answered from training data.
Gast’s founding story is a good test. Its own timeline names three founders, L.L. Tirrell, W.H. Gast and H.E. Howard, and says the company began by making insecticide sprayers for fruit trees. Only Perplexity, which read that page, got it right. The other three each invented a single founder: “M.D. Gast”, “Wally Gast”, “Howard Gast”. Claude also dated the IDEX acquisition to 2007; Gast says 1998. Perplexity again mixed Indeed employee reviews into its buyer sentiment.
Search interest compared
Google Trends data compared with other industrial rotary vane and claw brands, web search, October 2021 to October 2026. “gast vacuum pump” is level with Becker in the United States and Canada, the markets where Gast is strongest, and has a strong share in South Korea and South-East Asia.
Average search interest 2021–2026 (index)
Where people search for Gast
How to read this: of every 100 Google searches for these five brand names in South Korea, 42 were for Gast; the most searched brand there, Becker, had 58. It shows relative interest, not sales or market share.
| Country | Gast share | Rank | Most searched |
|---|---|---|---|
| South Korea | 42 % | 2nd of 5 | Becker (58 %) |
| United States | 40 % | 1st of 5 | — |
| Canada | 39 % | 2nd of 5 | Becker (43 %) |
| Malaysia | 31 % | 2nd of 5 | Becker (47 %) |
| Indonesia | 30 % | 2nd of 5 | Becker (60 %) |
| Mexico | 27 % | 3rd of 5 | Elmo Rietschle (41 %) |
| Australia | 22 % | 2nd of 5 | Becker (56 %) |
| Thailand | 18 % | 3rd of 5 | Becker (59 %) |
| United Kingdom | 13 % | 3rd of 5 | Becker (58 %) |
Pulled on 9 October 2026 via DataForSEO. Terms compared: “becker vacuum pump”, “rietschle vacuum pump”, “gast vacuum pump”, “pneumofore”, “dekker vacuum pump”. Relative values, not absolute search volumes; non-English searches are not included.
Technology fingerprint
Computed from our directory of 25 manufacturers: which technologies Gast offers and how common each is in the market.
| Technology | Makers in our directory | |
|---|---|---|
| Side channel | 3 of 25 | rare |
| Diaphragm | 5 of 25 | rare |
| Rotary vane | 15 of 25 |
Not in the range: Screw, Claw, Liquid ring, Scroll, Roots, Turbomolecular
Closest alternatives
Manufacturers with the largest overlap in pump technologies.
Product series at a glance
| Series | Technology | What it is for |
|---|---|---|
| Rotary vane (e.g. 0523, 1023) | Rotary vane | Oilless and lubricated vane pumps, the classic OEM and lab workhorse. |
| Diaphragm (e.g. DOA) | Diaphragm | Oil-free diaphragm pumps for lab and medical devices. |
| Regenerative blowers | Side channel | Side channel blowers for high-flow, low-pressure duty. |
Typical fit
- OEM equipment (medical, dental, lab instruments)
- Composites: vacuum bagging and resin infusion
- Lab bench vacuum and filtration
- Light industrial pick-and-place
Useful calculators
Official owner resources
Find service for Gast
Manufacturer service and independent shops in the US.
Vacuum Pump Service Directory (US) →
Frequently asked questions
Who owns Gast vacuum pumps?
Gast Manufacturing has been part of IDEX Corporation since 1998 and sits in its Health & Science Technologies segment. The company is based near Benton Harbor, Michigan.
Who founded Gast?
According to Gast, the company was founded in 1921 by L.L. Tirrell, W.H. Gast and H.E. Howard as a partnership making insecticide sprayers for fruit trees. It took the Gast name in 1925 and built its first high-speed air pump in 1929.
Is a Gast pump good for vacuum bagging?
Composites hobbyists on Reddit often recommend Gast because its pumps can run continuously for hours during infusion, unlike cheap HVAC pumps. Diaphragm models avoid oil mist; oilless vane models offer more flow.
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