Hayward MaxFlo Trap Lid Knob (SPX1250Z4) bypassvalves Hayward high-flow square main drain

Hayward high-flow square main drain grate with frame

The Waterco Opal XL cartridge element is designed for compatible 90 square foot filtration applications where the existing cartridge element needs replacement

A part like this is useful because it restores multiple wear-point components at once

or no longer performs at the level expected

Hayward MaxFlo Trap Lid Knob (SPX1250Z4) bypassvalves Hayward high-flow square main drainThe trap lid knob gives service access to the strainer area on compatible Hayward MaxFlo pumps. When the knob becomes stripped, cracked, or difficult to tighten, opening and securing the pump lid can become frustrating and unreliable. This replacement knob is a small but important repair item for routine pump maintenance. It helps restore easier handling of the trap lid and supports a cleaner service process when inspecting baskets, priming, or