I had a major leak in several spots causing me to lose the entire 150PSI in under an hour. I had a mixture of steel/galvanized/brass fittings on my setup. I changed it all over to brass last night, and changed the Teflon tape to Rector Seal #5. I still have a slow leak that i’m trying to track down. I filled the system up to 30PSI and by this morning lost almost the whole 30.
I want to get out there and spray the fittings with soapy water to find the leak, but it’s raining here. Anyone have any idea whats going on? Could my Hornblasters 1/2" valve be leaking slowly? Should I have used other fittings? The galvanized were garbage, the brass fit much better, which is probably why they’re 3x the price.
I’m starting to wonder if my gauge is wrong/broken. The pressure switch is a 150/120, but the gauge says 140 when the compressor shuts off. So either my switch is cutting out early, or the gauge is wrong. I’m going to try another gauge I think.
Well the switch definitely says “Off: 150” “On: 120” on the side. That’ll probably change to a 200PSI switch because I’m sick of this compressor already and am looking to upgrade. It’s very loud and obnoxious. Are the Air Zenith OB2’s any quieter than my Viair 450C, can anyone comment on that?
Found the leak. It was on the 2" coupler I was using between the valve and the tank. I didn’t suspect it to leak, but it was the last fitting I trusted to teflon tape. Everything is RectorSeal #5. All my other leaks from the other day are gone and sealed tight with the RS5.
Mine was the DOT air line fittings between the tank and check valve to the compressor. I got an industrial check valve and stuck it in the tank. Then I ran stainless line to the compressor and called it good. NO leaks anywhere now. What a freaking relieve! I have been messing with this for about 6 months.
I have the same issue with mine… Shuts off at exactly 140 :mad:
I’m in the middle of redoing my setup and i’m putting in a new pressure switch that is hopefully closer to 150… I might be wasting time but its a gamble i gotta check
I can’t give you a side-by-side comparison of a 450C to the OB2, but I just upgraded my setup to the Air Zenith OB2 from a 280C, and it is a tad louder than the 280C. The sound of it is deeper…it just SOUNDS like it has more “muscle”…if such word makes sense, and it is a MUCH heavier (in lbs) than the ViAir. I compromised on the pressure vs. volume also…I know the OB2 is rated for 200 psi, but for only 5 gallons…so I got a 7 gallon tank good for 200 psi and used a 145 / 175 pressure switch, plus a 235 psi safety popoff valve. On my first setup I had 7 gallons total air available, but the tanks weren’t rated high enough…one was good for 125 psi, the other was good for 150. I could have gone to the OB2 with my single 5-gallon, but I wasn’t willing to drive around with a potential bomb in the car.
On the subject of the pressure switch accuracy, my gauge says the compressor kicks in a tad below 140, and off just shy of the 175 mark. The recovery time is MUCH faster than the 280C.
Mmmmm…I clocked the fill rate from zero to auto-shutoff right after I got it installed, but it’s been long enough since I put it in that I’m a little fuzzy on exactly how long it took…it was about 3 weeks ago since I did it. Seems like it was in the 5- to 6-minute range, which considering I’m filling 7 gallons to 175 PSI, is not too bad. If I give the horns enough of a blast to bring the compressor on line (which normally happens right around 135 psi indicated) the recovery time is MUCH faster for the same volume of air than the 280C was from 110-145.
I just clocked it tonight to see…it took 1:45 for the pressure to recover from 130 to 170+. The 280 took several minutes to come back from 110-145.
