Pentair Gas Orifice Kit 333K NA | 77707-0421 A&A Pop Up Head Accessories Tools The seal itself is blue

The seal itself is blue and has fan-like edges making it easy to identify

Improves water and heat distribution

By actively fighting scale

the CX500CV provides an easy and effective solution to keep your pool's water system running smoothly

Test the gas lines for leaks after installation

Pentair Gas Orifice Kit 333K NA | 77707-0421 A&A Pop Up Head Accessories Tools The seal itself is bluePentair Gas Orifice Kit 333K NA 77707 0421 The Pentair Gas Orifice Kit (77707 0421) is a precision engineered replacement component for Pentair pool and spa heaters with a 333K BTU natural gas system. This kit regulates gas flow to ensure efficient combustion, optimal heating performance, and energy efficiency. Designed for durability, it helps maintain the reliability and safety of your heating system. Features: Genuine Pentair replacement gas