Pentair Coil/Tubesheet Sealing O-Ring Kit | Max-E-Therm 400 & MasterTemp 400 Heaters | 77707-0119 PS3868 confirm the part number stamped

confirm the part number stamped or molded on your existing hose cone matches K121110

The Unicel 4000 Series 4CH-30 is a 30 sq

This listing is a kit containing a washer and gasket — not a complete light assembly or fixture

The Pentair Seal Diffuser (355030Z) is the OEM replacement seal diffuser for the Challenger High Flow

Pentair Coil/Tubesheet Sealing O-Ring Kit | Max-E-Therm 400 & MasterTemp 400 Heaters | 77707-0119 PS3868 confirm the part number stampedThe 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