Therm-X-Trol ST-8 Thermal Expansion Tank (3.2 Gal Volume) Amtrol
Therm-X-Trol ST-8 Thermal Expansion Tank (3.2 Gal Volume) Amtrol
Therm-X-Trol ST-8 Thermal Expansion Tank (3.2 Gal Volume) Amtrol
Therm-X-Trol ST-8 Thermal Expansion Tank (3.2 Gal Volume) Amtrol
Therm-X-Trol ST-8 Thermal Expansion Tank (3.2 Gal Volume)
Brand: Amtrol
Part#: 140N738
Model: ST-8
This product has been discontinued. No direct replacement is available at this time.

Description

Amtrol ST-8 is 3.2 gallons In-Line Model of Therm-X-Trol searies expansion tank designed to control pressure build-up in closed, hot water systems. Equipped with the thickest diaphragm that provides extra strength and flexibility. Polypropylene tank liner provides 100% corrosion resistance and complies with NSF International Standard for clean and safe water storage.

Materials of Construction:

  • Shell: Steel;
  • Diaphragm: Butyl;
  • Liner: Polypropylene;
  • System Connection: Stainless Steel.

Technical Specifications:
  • Tank Volume 3.2 Gal (12 Lit)
  • Maximum Acceptance Factor 0.59
  • Maximum Operating Temperature: 200°C (93°C)
  • Maximum Working Pressure: 150 PSIG (10.3 bar)
  • System Connection (NPTM): 3/4"
  • Tank Height x Diameter: 15" x 9" (381 mm x 229 mm)
  • Shipping Weight 7 lb (3 Kg).

Warranty:
5 years manufacturer's warranty.

Documents

Write a Review
Helpful? Yes 3 No
Verified Purchase
Good sized
I wanted this size as it is just slightly oversized for my needs...50 gal water heater and 60 psi pressure. I was seeing 75 psi avg and excursions up to 120 psi before I put in pressure regulator and expansion tank. Now I only see 60 psi avg and 70 psi peak.
By Verified Buyer on 06/17/2016
Helpful? Yes No
Verified Purchase
Trustworthy
Great service, fast shipping, satisfaction follow up. Great vendor.
By Edward (from Vancouver, WA) on 03/02/2020

FAQs (2)

Ask a Question
Do you have a wall mount for the Therm-X-Trol ST-8 Thermal Expansion Tank 3.2 Gal?
Helpful? Yes 1 No
Yes. It's part# 598-0210
By PexUniverse Customer Service on 12/12/2016
Need an expansion tank for a crown boiler, 112 BTU, water heater heater is 40 gallons. Both natural gas. Can you recommend a Amtrol one.
Helpful? Yes No
According to the sizing charts provided by Amtrol, a 40-gallon water heater with 140F temp. setting and up to 80 psi static pressure would be fine with a ST-5 model. If unsure, you can always select a larger model (ST-8 or even ST-12).
By PexUniverse Customer Service on 01/27/2020
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