Pressure for blowouts

[Mdirrigation]

You moved to a company that used tow behind compressors to a company that uses roofing air compressors ? I wouldnt change jobs again the next company may use a bike pump.

[Mike Leary]

Originally Posted by Mdirrigation

may use a bike pump.

Which I preferred for backflow assemblies; seven psi is all you need.

[Mdirrigation]

Originally Posted by Mike Leary

Which I preferred for backflow assemblies; seven psi is all you need.

I use a football pump , easy to carry up with the hose

[Mike Leary]

Originally Posted by Mdirrigation

I use a football pump , easy to carry up with the hose

Good for you, I never trusted putting serious air through a backflow assembly because of the possibility of melting/warping the check retainers.

[cjohn2000]

Originally Posted by Mike Leary

Good for you, I never trusted putting serious air through a backflow assembly because of the possibility of melting/warping the check retainers.

Then your really gonna not like this, at my former company I was taught to open all the testcocks and blow air through them with the compressor, but most of them didnt get tested anyway. The cool thing is I get to suggest what we do next year, so I just have to get through this year with the roofing compressor. Funny thing is the guy I am replacing had it set to 120. I think I will stick to the philosophy that less is better as long as the job gets done. Nothing like popping a manifold by a menu board in a drive thru because the new hire isn't paying attention.

[Wet_Boots]

Originally Posted by cjohn2000

Then your really gonna not like this, at my former company I was taught to open all the testcocks and blow air through them with the compressor, but most of them didnt get tested anyway. The cool thing is I get to suggest what we do next year, so I just have to get through this year with the roofing compressor. Funny thing is the guy I am replacing had it set to 120. I think I will stick to the philosophy that less is better as long as the job gets done. Nothing like popping a manifold by a menu board in a drive thru because the new hire isn't paying attention.

What's being used for the air hose? (ID and length) It might reflect on the high pressure setting.

[1idejim]

Yov're prolly not gonna like this but if their SOP has been to use the roofing compressor you prolly wont change their minds.
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[AI Inc]

Originally Posted by irritation

You're screwed, go back.

what he said

[DanaMac]

I had a cold call yesterday, and the guy needs us to blow out the system, and fix the PVB. Seems he used his home air compressor, cranked the pressure, and blew the bonnet and poppet right out of the PVB. It could have very well already been old or weakened, but still.........

[1idejim]

Originally Posted by DanaMac

I had a cold call yesterday, and the guy needs us to blow out the system, and fix the PVB. Seems he used his home air compressor, cranked the pressure, and blew the bonnet and poppet right out of the PVB. It could have very well already been old or weakened, but still.........

The power of televison or the internet, go figure.........
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