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Posted by Jake on September 19, 2007, 6:22 pm
jsmith wrote:
> code says a loss of less than 5lbs over 48 hours passes.
>
> plumber installed copper lines. new construction. I would think no
> loss would be the case. shouldn't pressure hold constant, say after
> the first 24 hours and have no loss what so ever?I am taking in
> outside temp, etc, for fluctuation changes but the pressure should be
> more than 5lbs even after a 5 day?.
I'll jump into this only because we've designed a couple of testing
systems for manufacturers of water or water/glycol coils and I know a
little about it.
I AM NOT a plumber, so their advice may take precedence.
First off, air is a poor choice for testing a water system. Water
systems act on the premise of hydraulic pressure, while air acts on
pneumatic pressure.
The two are distinctly different animals, and the systems designed to
carry them are, too.
Water is much denser than air, so it takes less pressure to achieve the
equal mass. Domestic water piping systems, unless specifically designed
for the purpose, don't see near the pressure a pneumatic system would.
Thus, if you pressure tested with anything above about 5 psi, a whole
bunch of valves, regulators, and joints might be damaged. Hydraulic
(water) testing is the common and most acceptable method for your
application.
Jake
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Posted by on September 19, 2007, 6:45 pm
>jsmith wrote:
>> code says a loss of less than 5lbs over 48 hours passes.
>>
>> plumber installed copper lines. new construction. I would think no
>> loss would be the case. shouldn't pressure hold constant, say after
>> the first 24 hours and have no loss what so ever?I am taking in
>> outside temp, etc, for fluctuation changes but the pressure should be
>> more than 5lbs even after a 5 day?.
>I'll jump into this
Speaking of you jumping - how's the arm ? :-)
--
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Paul ( pjm @ pobox . com ) - remove spaces to email me
'Some days, it's just not worth chewing through the restraints.'
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Posted by Jake on September 19, 2007, 7:07 pm
.p.jm@see_my_sig_for_address.com wrote:
>
>> jsmith wrote:
>>> code says a loss of less than 5lbs over 48 hours passes.
>>> plumber installed copper lines. new construction. I would think no
>>> loss would be the case. shouldn't pressure hold constant, say after
>>> the first 24 hours and have no loss what so ever?I am taking in
>>> outside temp, etc, for fluctuation changes but the pressure should be
>>> more than 5lbs even after a 5 day?.
>> I'll jump into this
>
> Speaking of you jumping - how's the arm ? :-)
>
>
Ouch, Ouch, Ouch!
I started with 'physical terrorist' on Monday... and Geeze, I thought
surgery hurt a lot.
Because I really screwed up this same elbow years ago (in the AF), it's
going to take a while to get the 'range of motion' thing going again.
In the mean time, I'm into engineering more and road calls less. Might
be a good thing!
Jake
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Posted by tony on September 20, 2007, 7:38 pm
At what pressure 150# or 300# and I will assumed
we are talking air pressure
> code says a loss of less than 5lbs over 48 hours passes.
> plumber installed copper lines. new construction. I would think no
> loss would be the case. shouldn't pressure hold constant, say after
> the first 24 hours and have no loss what so ever?I am taking in
> outside temp, etc, for fluctuation changes but the pressure should be
> more than 5lbs even after a 5 day?.
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>
> plumber installed copper lines. new construction. I would think no
> loss would be the case. shouldn't pressure hold constant, say after
> the first 24 hours and have no loss what so ever?I am taking in
> outside temp, etc, for fluctuation changes but the pressure should be
> more than 5lbs even after a 5 day?.