Not exactly home repair but many of you have air compressors.
I'm fixing up an old Sears compressor and the regulator is broken. I got a "Campbell Hausfeld 3/8" air regulator" at Tractor supply. It had already been open but it was the only one in stock. Tried it and it didn't work. Adjust it either way and it always put out full air pressure.
Stopped at Lows and got another one, looks identical but with the "Kobalt" name. This one seemed OK, then it started leaking. Adjusting it up and down a few times stripped the plastic adjustment knob so now it can't be adjusted even if it didn't leak.
So where do I find a good regulator? Harbor Freights "Industrial Air Filter Regulator Unit Item # 98904 Manufacturer: Central Pneumatic regulator" isn't rated very high.