Subject: [Shop-talk] PVC pressure

From: Mark Miller via Shop-talk <[email-masked]>
Date: Thu, 26 Mar 2020 13:44:34 -0700

There are a large number of 'ifs' in any answer:
If it is all sch 40 piping and fittings (none of the thin wall sch 125 
stuff or flexible piping)
if the fittings were properly glued in
if it is not under stress from shifting after installation

That all said: the raw pipe is good for close to 200psi, burst strength 
is 5X that.  Give it no more than 20 and be very safe.  Or fill the 
piping with water and then pressurize above the water line with air and 
be even safer.  Or connect clear tubing to the pipe, hold it as high up 
as you can, and fill that all with water and see if the level drops, 
it's just under 1/2 PSI per foot of water elevation.

Regards, Mark Miller 707-490-5834 [email-masked]

On 3/26/2020 11:00 AM, [email-masked] wrote:
> Message: 2
> Date: Thu, 26 Mar 2020 10:32:27 -0500
> From: Robert Nogueirao<[email-masked]>
> To: Shop Talk<[email-masked]>
> Subject: [Shop-talk] Pressure testing 1 1/2 inch PVC
> Message-ID:<[email-masked]>
> Content-Type: text/plain; charset=utf-8
>
> I?m trying to check a buried 1 1/2 inch PVC pipe (pool) for a leak. I plan on pressurizing it to see if a leak is exposed.   What?s a safe pressure that won?t blow apart fittings?
>
> Bob Nogueira
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