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O-ring with 21 inch ID and 1/2 inch cross-section
and ease of maintenance all matter
Useful when original cartridges are worn or spent
That keeps the repair focused and can extend the life of the larger assembly
That makes it practical for regular field service
Hayward Universal Natural Gas Valve (FDXLGSV0001) pooltool O-ring with 21 inch IDThe Hayward universal natural gas valve is designed for compatible heater applications where dependable natural gas flow control is needed. A valve like this is useful because it helps manage fuel delivery to the heater, supporting more consistent burner performance and overall system reliability. This replacement is especially useful when the original gas valve is leaking, sticking, regulating poorly, or no longer responding correctly. Installing a
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