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Old 07-12-2010, 08:26 PM   #1
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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?

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Old 07-12-2010, 09:39 PM   #2
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Are you talking about the pipe protruding from a valve similar to this picture? If so, you do not. Is yours leaking? Under normal circumstances it should not be.


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Old 07-12-2010, 10:27 PM   #3
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You need to check with your local code official. Here in Ohio we dont have to pipe them to the exterior of the home. Where my mom and sister live they are ALL piped out of the home. Personally I think this is ridiculous. If the damn thing starts leaking how are you going to know if its piped outside. Just my opinion

BTW, that is not an overflow drain. That is a temperature and pressure relief valve which is an EXTREMELY important safety device that keeps your water heater from turning into a missile.

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Old 07-13-2010, 08:52 AM   #4
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In Oregon it depends on where it's installed. You can dump them straight onto a garage floor, or anywhere in the house it can dump into a pan, BUT the pan drain has to go to daylight.
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