Amtrol ST-12 Thermal Expansion TankThe Amtrol ST 12 Thermal Expansion Tank is designed for closed potable water systems and delivers reliable protection against pressure fluctuations in an efficient in line format. This tank combines a heavy duty butyl diaphragm with an antimicrobial inner lining, ensuring durable performance and cleaner water over time. With 3 4 inch female threaded inlet outlet connections, a 4. 4 gallon capacity, and factory pre charged air, the ST 12 supports

Number of Poles: 2

Temperature: 50–90°F

Air charge: Factory pre-charged at 12 PSIG

3 standards

reduce standby heat loss

It’s the ideal replacement part for maintaining accurate zoning and consistent comfort

helping to maintain efficient combustion

84" diameter x 16" length with a 3/4" threaded screw-in connection

it ensures secure

Easy installation with standard mounting

AO Smith 9004527205 Water Heater Gas Temperature Control Kit is designed to optimize safe

This 1/6 HP PSC motor runs on 120V AC and operates at 60 Hz