Pentair Coil/Tubesheet Sealing O-Ring Kit | Max-E-Therm 400 & MasterTemp 400 Heaters | 77707-0119 Cartridge Filters outlet covers and Jet-Air hydrotherapy

outlet covers and Jet-Air hydrotherapy fittings

Product Dosage

Use against blue-green

Confirm which size your cleaner line requires before assembly to avoid a return trip to the equipment pad

The FNS Plus series is available in multiple square footage ratings — lid assemblies are not interchangeable across sizes

Pentair Coil/Tubesheet Sealing O-Ring Kit | Max-E-Therm 400 & MasterTemp 400 Heaters | 77707-0119 Cartridge Filters outlet covers and Jet-Air hydrotherapyThe 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. This kit contains 12 O rings the complete set required to service all coil tubesheet sealing positions in the 400 model heat exchanger assembly. IMPORTANT: KIT OF 12 O RINGS NOT A SINGLE PIECE This listing is a kit of 12 O rings. All 12 are required