CMP Air Control [1-3/4"hs] [1"S] [Gunite/Fiberglass] [Black] (25098-004-000) gshop A union assembly like this

A union assembly like this is useful where the plumbing must remain serviceable while also transitioning between threaded and solvent-weld connection styles

Useful when the correct adapter is required for controlled servicing

Helps reduce line size within solvent-weld plumbing

or no longer threads together properly with the matching split nut components

On a six-button panel

CMP Air Control [1-3/4"hs] [1"S] [Gunite/Fiberglass] [Black] (25098-004-000) gshop A union assembly like thisThe CMP air control is designed for compatible gunite and fiberglass spa applications where a black 1 inch slip air control with a 1 3 4 inch hole size is needed. An air control is useful because it helps regulate the air entering the supported system, allowing the user to fine tune the feel and performance of the water feature. This replacement is especially useful when the original control is cracked, faded, seized, or no longer adjusting correctly.