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Topic ClosedPlumbing air pressure test?
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Olddawgsrule View Drop Down
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Posts: 1014 		Direct Link To This Post Topic: Plumbing air pressure test?
    Posted: 08 Nov 2017 at 4:45pm
Okay folks. Who has done this?

Pressurize the system with air and see how long it lasts. Best way to test for leaks without water everywhere.

What is the Pod setup for for pressure?
And how long should it hold?

I know the house spec's, but what are the Pod spec's?
You know.... Please share.. I'm searching everywhere on the internet and haven't learned..
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mcarter View Drop Down
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Posts: 3419 		Direct Link To This Post Posted: 08 Nov 2017 at 5:49pm
Interesting test. Personally I would not use more than 30-40 lbs. That's sufficient to find a leak and not harm any seals. 30 lbs is what most agree is recommended for air pressurization winterization. I have never done this. Recommended water pressure is not far above this.
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jato View Drop Down
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Posts: 3257 		Direct Link To This Post Posted: 08 Nov 2017 at 9:08pm
I would agree with Mike as far as not using more than 30 - 40 psi, that should be sufficient.  For the past 6 years I have used 60 - 80 psi when blowing out my water lines for winterizing, takes less than 1 minute to go through it all AND I always keep at least one line open when doing this.  
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Posts: 3419 		Direct Link To This Post Posted: 09 Nov 2017 at 8:42am
Jato,

Good to know, I may increase mine a bit, slow going at 30 psi. Everything I read said 30, so I have been using that.
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JandL View Drop Down
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Posts: 364 		Direct Link To This Post Posted: 09 Nov 2017 at 10:14am
Be careful when doing an air pressure test

From Charlotte Pipe, Air Testing of Plumbing Piping Systems, Technical Bulletin #15811
“Air testing – of any piping system – is not a system capability issue; it is
a life-safety issue. A pipe segment withstands air pressure in exactly the
same manner as it withstands hydrostatic pressure; the physics don’t
change.
Water is not compressible and cannot store energy through compression,
so under these scenarios nothing threatening will occur. Air is
compressible and will store energy under compression which will release
explosively, possibly throwing shards of pipe, test plugs, fittings or debris.”
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rawest50 View Drop Down
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Posts: 440 		Direct Link To This Post Posted: 09 Nov 2017 at 10:18am
I think my pressure regulator I use is rated for 50 psi. Is that something I should be concerned about? I have plenty of flow.
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JandL View Drop Down
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Posts: 364 		Direct Link To This Post Posted: 09 Nov 2017 at 11:18am
"I think my pressure regulator I use is rated for 50 psi."

Are you talking about your water pressure regulator? My water pressure regulator is also set to 50 PSI. The safety issue is when you use air to pressure something
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Olddawgsrule View Drop Down
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Posts: 1014 		Direct Link To This Post Posted: 09 Nov 2017 at 3:49pm
Thanks folks! Standards are very close to household.

35-45psi is all you require for household, 30psi sounds about right.

If no one had spoken up I was headed for 25psi. Though I still need to get the unit and read the system setting pressure. Typically less that half is sufficient and hold for an hour.

10% loss in that time frame is still fine. As an earlier post stated, there are differences between hydraulic and pneumatic pressures. Our plumbing system is built for hydraulic. So some loss is assumed and it's new, not all seals ave been 'wet' enough for proper sealing.

If pressure drops quickly and goes low fast.. Houston, we got a problem here!
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mcarter View Drop Down
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Posts: 3419 		Direct Link To This Post Posted: 09 Nov 2017 at 4:06pm
I have an adjustable water regulator, think most are preset 45-50, which is ok. Those not adjustable are at 45 I think. I maintain my pancake air compressor as close to 30 when doing winterization. That works. I have never air pressurized with all closed. Currently have no water leaks.
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Olddawgsrule View Drop Down
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Posts: 1014 		Direct Link To This Post Posted: 09 Nov 2017 at 4:22pm
Originally posted by mcarter

I have an adjustable water regulator, think most are preset 45-50, which is ok. Those not adjustable are at 45 I think. I maintain my pancake air compressor as close to 30 when doing winterization. That works. I have never air pressurized with all closed. Currently have no water leaks.

Thank you! Good info. Raises a question though...

What is the water pressure at most campgrounds? 

Input from my house will be well over 45.. You know the tank spec's?
Wondering if I should place a regulator on the water inlet. Do plan on a filter there.. Wouldn't be that hard to do..

I realize the tank pump regulates to the onboard plumbing, curious about pressure to the tank and it's rating?  
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