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Water Heater Drain Pipes - PVC?

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Water Heater Drain Pipes - PVC? jason 08-08-2005
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Posted by on August 8, 2005, 5:13 am


I recently had a house inspection conducted on a house I intend to
purchas. The inspection showed that PVC (not CPVC) was being used as
the T&P drain. The inspector stated that this may not have been
against code when it was built (8 years ago), but was not considered
acceptable according to his standards.

Is it truly a concern that the hot water drained would cause problems
with potential melting of the PVC joints?

There is access in the attic to replace a portion of the PVC up to
where it goes into the wall. If I had the accessible PVC replaced with
copper into a holding tank that subsequently connects to the PVC, would
it be sufficient to cool the water enough?

Is there a flexible hose option - similar to hot water hoses that
connect to washing machines?

I want to avoid any interior work where the lines go through the wall
and drain outside.

Any thoughts?



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Posted by Harry K on August 8, 2005, 6:23 am



jason@kaddywampus.org wrote:
> I recently had a house inspection conducted on a house I intend to
> purchas. The inspection showed that PVC (not CPVC) was being used as
> the T&P drain. The inspector stated that this may not have been
> against code when it was built (8 years ago), but was not considered
> acceptable according to his standards.
>
> Is it truly a concern that the hot water drained would cause problems
> with potential melting of the PVC joints?
>
> There is access in the attic to replace a portion of the PVC up to
> where it goes into the wall. If I had the accessible PVC replaced with
> copper into a holding tank that subsequently connects to the PVC, would
> it be sufficient to cool the water enough?
>
> Is there a flexible hose option - similar to hot water hoses that
> connect to washing machines?
>
> I want to avoid any interior work where the lines go through the wall
> and drain outside.
>
> Any thoughts?

The PVC should be fine. As to the inspector he is inserting his
personal belief into a matter of code. If it isn't allowed 'now' fine,
but it was when it was installed and thus is grandfathered in. He
might not like it but that's just tough. This being an inspector he
has no enforcement powers, were it a code enforcer of some type
refusing to clear it, I would be at his supervisor's office
immediately.

Harry K



Posted by stevie on August 8, 2005, 8:36 am


i had the same situation when i installed a new hot water heater.

i had to do some re-routing of the pvc from the t&p valve, so i used cpvc
coming out of the t&p, then used an adapter (cpvc to pvc)just before the pvc
went into the wall.

but, like the others said, i wouldn't worry too much about it.
I recently had a house inspection conducted on a house I intend to
purchas. The inspection showed that PVC (not CPVC) was being used as
the T&P drain. The inspector stated that this may not have been
against code when it was built (8 years ago), but was not considered
acceptable according to his standards.

Is it truly a concern that the hot water drained would cause problems
with potential melting of the PVC joints?

There is access in the attic to replace a portion of the PVC up to
where it goes into the wall. If I had the accessible PVC replaced with
copper into a holding tank that subsequently connects to the PVC, would
it be sufficient to cool the water enough?

Is there a flexible hose option - similar to hot water hoses that
connect to washing machines?

I want to avoid any interior work where the lines go through the wall
and drain outside.

Any thoughts?




Posted by Colbyt on August 9, 2005, 11:31 pm


> I recently had a house inspection conducted on a house I intend to
> purchas. The inspection showed that PVC (not CPVC) was being used as
> the T&P drain. The inspector stated that this may not have been
> against code when it was built (8 years ago), but was not considered
> acceptable according to his standards.
>
> Is it truly a concern that the hot water drained would cause problems
> with potential melting of the PVC joints?
>
> There is access in the attic to replace a portion of the PVC up to
> where it goes into the wall. If I had the accessible PVC replaced with
> copper into a holding tank that subsequently connects to the PVC, would
> it be sufficient to cool the water enough?
>
> Is there a flexible hose option - similar to hot water hoses that
> connect to washing machines?
>
> I want to avoid any interior work where the lines go through the wall
> and drain outside.


Around here it has not been legal to use anything other metal pipe for the T
& P for at least the last 20 years. The pipe must be the same size as the
cold water line entering the water heater. The line must discharge to the
outside and must not terminate more than 4" above the finished grade.

Other than doing it to code, yours may be different, I can't suggest any
anything.

Colbyt




Posted by on August 8, 2005, 8:47 am


can you run it thru the floor and out of the foundation wall..



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