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1/2" pipe on 3/4" water heater temp press relief valve

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1/2" pipe on 3/4" water heater temp press relief valve deans@wdeans.com 04-12-2007
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Posted by deans@wdeans.com on April 12, 2007, 6:08 pm


Greetings,

Today I looked at a house and when I asked about the 1/2" pipe on 3/4"
water heater temp / pressure relief valve. I was told that it wasn't
a problem since a 1/2" cold water pipe was adapted onto the 3/4"
entrance to the water heater. Is this true? If not can you site
anything which says this is not OK?

Thanks!


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Posted by hallerb@aol.com on April 12, 2007, 8:00 pm


te:
> Greetings,
>
> Today I looked at a house and when I asked about the 1/2" pipe on 3/4"
> water heater temp / pressure relief valve. =A0I was told that it wasn't
> a problem since a 1/2" cold water pipe was adapted onto the 3/4"
> entrance to the water heater. =A0Is this true? =A0If not can you site
> anything which says this is not OK?
>
> Thanks!

functionallyt it likely doesnt matter, but code requires the line not
be downsized............


Posted by Grandpa on April 12, 2007, 8:20 pm


hallerb@aol.com wrote:
>> Greetings,
>>
>> Today I looked at a house and when I asked about the 1/2" pipe on 3/4"
>> water heater temp / pressure relief valve. �I was told that it wasn't
>> a problem since a 1/2" cold water pipe was adapted onto the 3/4"
>> entrance to the water heater. �Is this true? �If not can you site
>> anything which says this is not OK?
>>
>> Thanks!
>
> functionallyt it likely doesnt matter, but code requires the line not
> be downsized............
>
Its really going to depend upon the prevailing code. Where my son
lives, its a requirement that it not be restricted; where I live (12
miles away), its not listed in the code. He needs a drain pan under
the heater, I don't (but there's one there anyway).
--
Grandpa

Posted by hallerb@aol.com on April 12, 2007, 8:01 pm


te:
> Greetings,
>
> Today I looked at a house and when I asked about the 1/2" pipe on 3/4"
> water heater temp / pressure relief valve. =A0I was told that it wasn't
> a problem since a 1/2" cold water pipe was adapted onto the 3/4"
> entrance to the water heater. =A0Is this true? =A0If not can you site
> anything which says this is not OK?
>
> Thanks!

get a home inspector in there, if they are fudging this no doubt more
corners were cut and you have a excellent opportunity to run the price
down


Posted by Edwin Pawlowski on April 12, 2007, 9:17 pm



> Greetings,
>
> Today I looked at a house and when I asked about the 1/2" pipe on 3/4"
> water heater temp / pressure relief valve. I was told that it wasn't
> a problem since a 1/2" cold water pipe was adapted onto the 3/4"
> entrance to the water heater. Is this true? If not can you site
> anything which says this is not OK?

As a practical matter, I doubt it would make any difference at all. OTOH,
codes usually specify there be no restrictions or size reductions of safety
devices. Not a big deal either way, IMO, but I'm not buying the house.
Would I change it? Probably not.



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