Bostitch CAP1512-OF leaks when pressure reduced with regulator

by Mark
(Mechanicsburg OH USA)

I have a Bostitch CAP1512-OF that had been working fine.


Now, it leaks when pressure regulator is turned counter-clockwise to reduce the outlet pressure.

So now the compressor continuously cycles on as the pressure continuously drops due to the leakage.

I can hear that the leakage is directly under the regulator knob but I don't know how the knob is attached and I don't want to break it.

Can you tell me how to remove the knob and once removed will I be able to make repairs?

Comments for Bostitch CAP1512-OF leaks when pressure reduced with regulator

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Dec 29, 2015
Bostitch CAP1512-OF leaks
by: Bill

A regulator is designed to "relieve" pressure from the downstream air line if the pressure setting is turned down. This allows the higher downstream air pressure to vent until it reaches the new, lower pressure setting.

If air is leaking out of the regulator all of the time, where is that air coming from?

If the hose downstream has been disconnected from the discharge coupling there is no air to bleed back up through the regulator, therefore, the leaking air has to be coming from the tank.

That being the case, the first thing you need to check, clean or replace is the tank check valve.

As to "fixing" the regulator, by the time you find parts (if they are available - unlikely) and try to figure out how to disassemble, it's likely less aggro to replace the whole unit at around $15 or so.

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