We recently went into Sears to look at new water heaters and were told that we are required to have a Expansion tank installed because we live in Shawnee. One of the other plumbers that gave us a bid said that they are not required. Could you please clear this up for us?

1 answer

In Shawnee, thermal expansion tanks are only required in new houses. Otherwise the expansion tank is optional, even on a closed loop system. However, some manufacturers may not warranty a leaking water heater if installed without the expansion tank. 

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