Welcome to Direct Brand – Your Home For Replacement Parts

Amtrol Therm-X-Trol ST-5 Expansion Tank.


SKU: 106995
  • Brand Name: Amtrol
  • Part Number: ST-5
  • Fast shipping and 30 days hassle-free returns policy

Fast Shipping options with FedEx, USPS & UPS shipping to usa and canada flags

trust pilot stars

Amtrol Therm-X-Trol ST-5 Expansion Tank ST-5

This Amtrol ST-5 (Therm-X-Trol) is a water heater expansion tank is designed for use in domestic hot water heating systems. the tank assists in eliminating the potential hazards of water expansion. The tanks are commonly installed in a domestic hot water system that contains a backflow preventer, a check valve or a pressure reducing valve. The Therm-X-Trol Expansion Tank can be used in apartments, office buildings and hospitals. This expansion tank helps eliminate BTU and water waste. The tank helps protect the fixture and heater. This tank is easy to install..

Full Product Specifications:

  • Depth: 8 1/4 in
  • Width: 8 1/4 in
  • Height: 12 5/8 in
  • Weight: 5 lbs
  • Tank capacity: 2 gallons
  • Maintains system pressure at safe levels/minute
  • Help eliminate BTU and water wastes
  • Helps protect heater and fixtures
  • Tank and bowl constructed with durable vitreous china
  • Limits the system’s pressure build up
  • Macerator/pump plugs into a common electrical outlet
  • Tank connects to water supply hose (not included)
  • Can be installed in hospitals, office- and housing buildings
  • Limits the system’s pressure buildup
  • Can be used in office buildings, apartments, hospitals and laundromats

Included in the Amtrol ST-5:

Water expansion tank


Installation Instructions


Users guide


Other Items Related to:Amtrol Therm-X-Trol ST-5 Expansion Tank:

You may also like…

  • Amtrol 824830 Ch-41Z Blue Boiler Mate
  • Amtrol 1413430 940R101 Digital Temp Control
    Heater Accessories

    Amtrol 940R101 Digital Temp Control

  • Amtrol 76717 St-12 Therm-X-Rol 4.4Gal
    Oil Systems

    Amtrol ST-12 Therm-X-Rol 4.4Gal


30 Days Hassle-Free Returns Policy

We know sometimes you may need to return items that you have ordered that are not quite right for you, that’s why we make returns as easy and stress-free as possible at Direct Brand.

Email us at sales@direct-brand.com with your order number and we’ll give you instructions on how to return your product.

If the product you ordered is not right for you, and has its original packaging, you may return it within 30 days of delivery for a full refund. Any items opened and used cannot be refunded. 

See more…

Your Cart