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 Hot Water Heater piping
Author: Thomas Bud (PA)

Is the use of flexible hot and cold water connections acceptable with gas hot water heaters? Sorry, I wasn't clear. It's SS braided flex.



Edited 1 times.

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 Re: Hot Water Heater piping
Author: stuckinlodi (MO)

I think there is supposed to be 18 inches of metal pipe connected to both sides of the water heater (like copper), then you can connect pex to those pipes.
.

"UPC Code 604.11.2 Water Heater Connections. PEX tubing shall not be installed within the first 18 inches of piping connected to a water heater".



Edited 3 times.

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 Re: Hot Water Heater piping
Author: North Carolina Plumber (NC)

Flexible copper or stainless - yes.
Flexible cloth braided plastic- no.

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 Re: Hot Water Heater piping
Author: stuckinlodi (MO)

I've heard that some pex manufacturers say their pex is ok to connect directly to a water heater, just keep it a certain distance from the vent if installing on a gas water heater. But of course they sell their product worldwide and different places have different plumbing codes. Just because something will work doesn't make it legal. Always good to check with the local authorities to see if it is allowed in your area. As time goes by and new products become available the plumbing code sometimes gets changed but it is a slow process.



Edited 1 times.

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 Re: Hot Water Heater piping
Author: Thomas Bud (PA)

Sorry, I wasn't clear. It's SS braided flex.

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 Re: Hot Water Heater piping
Author: stuckinlodi (MO)

Some plumbers report the braided SS flex lines have failed or caused problems. You can google to see several forums where it is discussed.

Here's an example:

[www.ridgidforum.com]



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 Re: Hot Water Heater piping
Author: sharp1 (IL)

The stainless braided flex has plastic tubing inside.

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 Re: Hot Water Heater piping
Author: bernabeu (SC)

ditto

The 'braided' stainless is merely an OUTER COVER for the PLASTIC inner tube.

There are, however, 'flexible' corrugated stainless tubes, but, they are superfluous as the corrugated copper ones are the ones to use.

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Retired U.A. Local 1 & 638 ~ Measure Twice & Cut Once

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 Re: Hot Water Heater piping
Author: hj (AZ)

Just like the tankless water heater companies say to use PVC for venting and the PVC manufacturers say DO NOT.

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 Re: Hot Water Heater piping
Author: vic (CA)

I rarely give my opinions here however I wish to share my opinion in this case that when using flexes connected to "regular" water heaters (which are almost always steel with glass lining) I highly recommend using quality stainless steel flexes over copper flexes.

Quality stainless flexes (not braided which have plastics inside nor "cheap" stainless flexes) are more compatible to steel versus copper (should there be a hidden crack in the steel lining copper and steel don't mix) as well as are superior to braided stainless steel flexes (which have plastic linings).

Stainless flexes aren't much more expensive than copper flexes:

[www.plumbingsupply.com]

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 Re: Hot Water Heater piping
Author: PlumberLoren (CA)

Vic is correct. I recently had a SS Braided Flex connector leak at the fitting where the tube meets the 3/4" female connector. I will not use SS Braided Flex Connectors again.

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 Re: Hot Water Heater piping
Author: bernabeu (SC)

vic,

I stand corrected.

Due to the minimal cost difference.

:)

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Retired U.A. Local 1 & 638 ~ Measure Twice & Cut Once

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