Herga Microbore Black Air Button (6434-00) marquisspas The SPX0740D is a practical

The SPX0740D is a practical service part for compatible Hayward Selecta-Flo valves that need renewed gasket support and cleaner internal sealing

The PS-671 part number makes it easier to verify the correct component before installation

even a spa that still runs can feel more frustrating because the owner loses confidence in the main point of control

and service documentation

Herga Microbore Black Air Button (6434-00) marquisspas The SPX0740D is a practicalThe Herga Microbore Black Air Button is a replacement pneumatic push button for compatible air switch control applications. Air buttons are commonly used in spa, bath, and equipment control setups where a user operated button sends air pressure through tubing to activate a remote air switch. Replace the air button if the original is cracked, sticking, leaking air, or no longer triggering the connected switch reliably. Confirm the button style, color,