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Old 10-13-2015, 08:44 AM   #1
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Default Water heater expansion tank question please

Could someone tell me how you know exactly when an expansion tank is needed on a water heater. I understand it is when the water system is a closed system, but a little fuzzy on how you identify a closed system.

If the main water line entering a house has a pressure regulator does that mean that 100% of the time you need an expansion tank on a heater?

Could someone please tell me what you look for in houses that tells you for sure that it is a closed system?

Thanks for any replies
Greg
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Old 10-13-2015, 08:48 AM   #2
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Default Water heater expansion tank question please

Nobody here is going to tell you, but if you hire a plumber instead of being a cheap home flipper ,they may help you.
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Old 10-13-2015, 08:49 AM   #3
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Quote:
Originally Posted by plumbdrum View Post
Nobody here is going to tell you, but if you hire a plumber instead of being a cheap home flipper ,they may help you.
thanks for being such a giant prick.....have a blessed day!
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Old 10-13-2015, 08:50 AM   #4
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Your very welcome, now show yourself to the door to the DIY website.
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Old 10-13-2015, 11:04 AM   #5
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It has to do with the type of piping and if you have a PRV. As long as you have a PRV you can avoid having to install a thermal expansion tank by using CPVC water supply lines.
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