Amazon.com: Oatey 30115 Hercules Boiler Liquid Stop
spa is over 20 years old. over the period, very gradually, a small leak became worse. my 'spa' guy suggested 2 solutions: (1 ) order a quart bottle of this oatey 3115 professional leak stop for high temperature boilers and very hot water. my spa temp is set at 100f . ( cold by any comparison).
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