Question about Stanley Bostitch AB-9048025 Check Valve

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Bostitch AB-9048025 What's it made of?

Had a check valve like this on a Clarke MODEL AC2001B air compressor. It broke because it had undue position strain ( more than the "POT METAL" would handle). Trying to find a vendor that handles the Clarke parts (out of business). this valve by/from Stanley-Bostitch would probably work but sofar cannot determine what's it made of ? Ebay vendor had some but, he is no longer there?

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  • waitingg Nov 08, 2012

    the added links are a source for future problems. not this time. accidently found a source on amazon, guy has only 10 or so left at this time. But it looks like the parts he has are made of the same "pot metal" [zinc] and crudly made, loose threads even to the point of excessive leaks, may break at any time. says it's "brass" I doubt it, if it isn't brass I will return and get a brass check valve and reroute the two tubes involved. many thanks

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  • Master
  • 885 Answers

Bostitch calls the AB-9048025 a non-return valve, most compressor companies call then tank check valves. All the check valves I've worked with are brass with a spring loaded, plastic valve to hold the air in the tank when the pump shuts off. Many are interchangeable with a little line re-routing. You can find the AB-9048025 on sites like www.ereplacementparts.com. Also, on that site, you can put "tank check valve" in the parts search box and get a list of valves available and most have pictures of them so you can see what you'd be working with.

Posted on Nov 06, 2012

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sounds like an air leak of some sort. when you get it up to as high as it will go, turn it off and listen for an air leak. Let me know where it is leaking and i will tell you what to fix

Posted on Jul 13, 2009

  • 1 Answer

SOURCE: the check valve is leaking on my stanley bostitch

i have a bostitch air compressor.its about 2 yr old. i havent used it much. just all of a sudden it quit pumping air. tha motor run but will not fill with air.

Posted on May 29, 2010

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SOURCE: I Have a Stanley air compressor Bostitch model

The brown liquid you are getting out of the compressor is water with rust in it from the inside the air tank. Somewhere on the bottom of your air tank there is a valve you need to open from time to time to drain the water from your tank. If you are getting rusty water from the air outlets you probably have a lot of water in the tank. If you can take the compressor outside, with pressure in the tank, where the water won't stain anything and slowly open the valve to drain the tank.

Posted on Feb 02, 2011

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If you need more help come back.Post / thumbs / testimonial are welcome!

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Bostitch air compressor cap 60p-of


Mine had the same problem.
One of the reed valves in the head had broken off due to metal fatigue. Take off black plastic housing with 5 screws along the bottom and one bolt under the handle (the front only). Unscrew the four allen headed screws on top of the compressor. Unscrew the discharge line from the head. You'll need part # AB-A640050 which is the valve plate assy. and possibly AB-9007012 which is the intake valve located in the top of the piston (if damaged). About $18 including shipping from Bostitch.

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