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The Pentair Coil/Tubesheet Sealing O-Ring Kit (77707-0119) is the OEM replacement O-ring set for the water system coil and tubesheet sealing points in the Max-E-Therm 400 and MasterTemp 400 series heaters
Consult your MiniMax heater's service manual for the correct ignition sequence parameters to verify the replacement board is operating as expected after installation
Verify the color of your existing lid before ordering — an incorrect color lid is not a functional issue
inspect all associated gaskets and O-rings at the same time
Pentair Appliance Adapter, Stainless Steel (HeatFab) | 77707-0086 Pool Cleaner Parts The Pentair Coil/Tubesheet Sealing O-RingThe Pentair 77707 0086 is the OEM stainless steel appliance adapter for horizontal or vertical positive pressure venting. Manufactured by HeatFab (a Selkirk Corp. brand), this adapter is the factory specified component for connecting the heater's exhaust system to positive pressure vent configurations. IMPORTANT: LICENSED PROFESSIONAL INSTALLATION REQUIRED Gas and electrical heater components must be serviced by a licensed pool professional or
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