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trboyette 07-12-2010 08:25 PM

water heater
does the hot water heater overflow drain (the piping extending from the top of the appliance) have to exit the home to the exterior of the home?

Just Bill 07-13-2010 05:52 AM

Depends on local code, most do not require that.

majakdragon 07-13-2010 07:29 AM

I have lived in 3 States (Ohio, Florida and Arkansas) and only Florida required this.

rockerjockey 07-13-2010 07:39 AM

Actually the Florida Code states in section 504.6.1:

"The relief valve shall discharge full size to a safe place of disposal such as the floor, water heater pan, outside the building or an indirect waste receptor."

Mike Swearingen 07-13-2010 08:34 AM

I have my T&P valve line plumbed to discharge down into a drain pan and IT is drained to under my house in the crawlspace in case there is ever a blowout. If you can get it fairly easily plumbed to the outside, that's they way to go. Otherwise, if it blows inside the house, you are going to have a heck of a scalding flood (although the water heater won't blow up).
Good Luck!

majakdragon 07-13-2010 12:25 PM

When I did house work in Ocala Florida, the Code required the TP discharge pipe to exit the house and go into a french drain, at least 16" deep (we used a piece of 8" PVC filled with stones) and also have a tee with one outlet facing upwards so the owner could see water escaping, and the other outlet piped down into the drain. Guess this was a local Code.

rockerjockey 07-13-2010 01:09 PM

A good reason to always check with your local bldg. dept.
The inspector always has the last word and it's his interpretation of the code that counts.

Gary in WA 07-13-2010 01:50 PM

Local codes may apply:

Page #6:

Be safe, Gary

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