Raypak 105A/105B/183A Heat Exchange Gasket [3/4" ID, 1-1/8" OD] [Qty 9] (800014B) aquastar It is often replaced when

It is often replaced when the original grid fabric is torn

That helps improve repair quality without forcing a broader replacement than necessary

When a check valve becomes unreliable or difficult to access

Improves comfort and heating-system confidence

Raypak 105A/105B/183A Heat Exchange Gasket [3/4" ID, 1-1/8" OD] [Qty 9] (800014B) aquastar It is often replaced whenThe Raypak heat exchange gasket set is designed for compatible 105A, 105B, and 183A heater applications where multiple sealing points in the heat exchange area need fresh gaskets. A gasket like this is useful because it helps maintain leak protection and cleaner sealing at critical joints inside the heater assembly. This replacement is especially useful when the original gaskets are flattened, brittle, or being disturbed during service. A nine piece