Pentair O-Ring Kit | MasterTemp & Max-E-Therm | 77707-0120 C4325 Includes two hubs size 1

Includes two hubs size 1 - 3/4 inches

Never use petroleum-based lubricants — they degrade rubber O-rings and will void the seal quickly

Calcium Prevent white calcium build-up and protect pool surfaces and equipment with precise Calcium Hardness test results

There are many causes for foaming conditions in recreational water - foam stop provides an instant solution

Pentair O-Ring Kit | MasterTemp & Max-E-Therm | 77707-0120 C4325 Includes two hubs size 1The Pentair O Ring Kit (77707 0120) is the OEM replacement seal kit for MasterTemp and Max E Therm gas heaters. This kit includes Item Nos. 3 and 5 from the heater's parts diagram. IMPORTANT: KIT LISTING MULTIPLE O RINGS INCLUDED This listing is a kit containing multiple O rings not a single O ring. Confirm this kit number against your heater's parts diagram before ordering. IMPORTANT: LUBRICATION REQUIRED SOLD SEPARATELY Always lubricate these O