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

and contaminants for crystal-clear pool water

Bromine is as effective as chlorine with the benefit of no chlorine odor

This cleaner part automatically controls excess flow through the cleaner for optimal performance

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