Quote:
Originally Posted by Cajundaddy
That is an old Laars Series One heater that is famous for melting pvc on shutdown. Installation instructions called for 5' of copper in and out of the heater as a heat sink.
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This is spot on... you can put in copper or steel or do the usual swimming pool thing and use 12" or more of CPVC at the inlet/outlet of the heater. Ask for it at your pool store.