PresAir Trol Standard Air Button [1-⅝" HS, 2-5/8" FD] [White] (B225-WA) unions A thermostat helps regulate operating

A thermostat helps regulate operating temperature in a compatible heater system

Improves appearance and day-to-day usability

0 HP setup

When labels are missing or worn

The 25912-204 is a practical service part when a compatible plumbing system needs a 2-port diverter valve to restore dependable flow-routing support

PresAir Trol Standard Air Button [1-⅝" HS, 2-5/8" FD] [White] (B225-WA) unions A thermostat helps regulate operatingThe PresAir Trol standard air button in white is intended for compatible 1 5 8 inch hole size installations with a 2 5 8 inch face diameter and offers a clean, traditional look for pneumatic controls. This style works well when the goal is to keep the control point simple, functional, and visually consistent with lighter trim finishes. This replacement is especially useful when the original button has yellowed, cracked, or stopped feeling dependable