THERM-X-TROL ST-5 Expansion Tank Zoom

THERM-X-TROL ST-5 Expansion Tank

SKU:140N43

Brand: Amtrol

Amtrol
Qty Price
$43.49
/ each
$165.96 / box (4 units x $41.49)
In Stock! Ships in 24-48 Hours
(53 Available)
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Resources

Specs

Tank Volume: 2 Gallons
Max Accept. Factor: 0.45
Diameter (Inches): 8"
Height: 12-5/6"
Weight (lbs): 5 lbs
Warranty: 5-Year Limited Warranty
Size: 3/4"
Material: Steel
Application: Plumbing
Max Pressure (PSI): 150 psi
Temperature Range (F): 200°F MAX

Description for Amtrol 140N43

Amtrol ST-5 (Therm-X-Trol) is a water heater expansion tank, designed for use in domestic hot water heating systems to eliminate the potential hazards of water expansion. Water heater expansion tank is commonly installed in a domestic hot water system that contains a backflow preventer, a check valve or a pressure reducing valve.

Amtrol ST-5 Advantages:

  • Eliminates the waste of energy and water, thus saving money
  • Protects the water heater and plumbing fixtures from premauture failure
  • Reduces potential safety hazards associated with thermal expansion
  • Prevents a dangerous pressure build-up in the system
  • Prevents the relief valve from going off
  • Therm-X-Trol brand is the #1 choice of Professional Installers

The HydroClaw Expansion Tank Support Bracket provides a safe and reliable option if you prefer to mount your expansion tank. This expansion tank bracket is easy to install and will hold any tank with a diameter of 8" nominal.

THERM-X-TROL ST-5 Expansion Tank

REVIEW SNAPSHOT®

by PowerReviews
AmtrolTHERM-X-TROL ST-5 Expansion Tank
 
4.9

(based on 28 reviews)

Ratings Distribution

  • 5 Stars

     

    (25)

  • 4 Stars

     

    (3)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

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          • No (18)

        Reviewed by 28 customers

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        5.0

        Works as advertised, good quality

        By Jim

        from Gunnison, CO

        Verified Buyer

        Comments about THERM-X-TROL ST-5 Expansion Tank:

        As I understand, this is the version of the Amtrol 2-gallon tank that is made in the US. The quality seems good and I had no problems with it. My new water heater used to leak from the pressure relief valve, now it doesn't. I mounted it horizontally. There are brief instructions. What they don't tell you anywhere is that the plumbing connection is 3/4" male pipe thread. I reduced that to 1/2" and then used a 1/2" pex adapter.

        I used a floor-type bicycle pump to pressurized to my water pressure (80 psi). It's a little difficult when the pump is upside down, but doable.

         
        5.0

        Perfect replacement part

        By Stewart

        from Eldersburg, MD

        Verified Buyer

        Comments about THERM-X-TROL ST-5 Expansion Tank:

        The expansion tank on my gas hot water system had developed a leak from corrosion and had also failed internally, being many years old, and was causing the relief valve to release water periodically. Found this one and it was a perfect fit and an exact replacement part. Easy to install by just using some Teflon tape and it threaded right in until tight and no drips. Ordering was easy and it arrived promptly. Now the system is a-ok and the relief valve dry. Working great.

        (0 of 1 customers found this review helpful)

         
        5.0

        Way more bang for the buck"

        By Handy Dandy

        from Williamsburg, Virginia

        Verified Buyer

        Comments about THERM-X-TROL ST-5 Expansion Tank:

        well defined, simplexity at it's best.

         
        5.0

        Good service.

        By Flyer

        from Ny

        Verified Buyer

        Pros

          Cons

            Best Uses

              Comments about THERM-X-TROL ST-5 Expansion Tank:

              Produt seems of good quality. Fast and undamaged shipping.

              • Was this a gift?:
              • No
               
              5.0

              A product you can trust.

              By DIYer

              from Philadelphia, PA

              Verified Buyer

              Pros

                Cons

                  Best Uses

                    Comments about THERM-X-TROL ST-5 Expansion Tank:

                    My old expansion tank broke.

                    • Was this a gift?:
                    • No
                     
                    5.0

                    THERM-X-TROL ST-5 Expansion Tank by Amtr

                    By GARY D

                    from SARASOTA, FL

                    Verified Buyer

                    Pros

                      Cons

                        Best Uses

                          Comments about THERM-X-TROL ST-5 Expansion Tank:

                          Pex shipped right away, the part arrived in 3 days regular shipping and the remodel project got done on schedule.

                          THANKS PEX!

                          • Was this a gift?:
                          • No
                           
                          5.0

                          No More Pressure Surges

                          By Clint

                          from Atlanta, GA

                          Verified Reviewer

                          Pros

                            Cons

                              Best Uses

                                Comments about THERM-X-TROL ST-5 Expansion Tank:

                                Works great, and the support bracket is a must. Used a battery operated air pump to pump tank to 50 psi to match line pressure. Packaged nicely, and arrived quickly. Thanks Pex Supply.

                                • Was this a gift?:
                                • No
                                 
                                5.0

                                "I would buy this product again

                                By Sam

                                from Pulaski,NY

                                Verified Buyer

                                Pros

                                  Cons

                                    Best Uses

                                      Comments about THERM-X-TROL ST-5 Expansion Tank:

                                      Works great, no more hammering when washer shuts off!

                                      • Was this a gift?:
                                      • No
                                       
                                      5.0

                                      Good Price Fast Shipping

                                      By ExpansionTank

                                      from Raleigh NC

                                      Verified Buyer

                                      Pros

                                        Cons

                                          Best Uses

                                            Comments about THERM-X-TROL ST-5 Expansion Tank:

                                            This unit had 40 psi air pressure standard from the manufacturer (as specified). I increased to 60 psi to match the static water pressure in my home. When replacing your expansion tank, evaluate the mounting. I used 2 large stainless hose clamps around the tank, attached to a 2x4.

                                            • Was this a gift?:
                                            • No

                                            (0 of 1 customers found this review helpful)

                                             
                                            4.0

                                            2 gallon expansion tank

                                            By Ed the plummer

                                            from Delaware Ohio

                                            Verified Buyer

                                            Pros

                                              Cons

                                                Best Uses

                                                  Comments about THERM-X-TROL ST-5 Expansion Tank:

                                                  Exact match of the original tank I replaced.

                                                  I think 6 years is a short lifespan for this tank.

                                                  • Was this a gift?:
                                                  • No

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                                                  Q&A: Ask the Questions, share answers

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                                                  4 Questions | 5 Answers
                                                  Displaying questions 1-4
                                                  • THERM-X-TROL ST-5 Expansion Tank

                                                    Q:

                                                    does it matter what position the unit is mounted? horizontal vertical etc.
                                                    Asked on 11/15/2011 by grump from niagara falls,ny

                                                    2 answers

                                                    • A:

                                                      no, you can mount sideways or upside down. it is a bladder tank so it will be ok any position.corky

                                                      Answered on 10/17/2013 by corky meier handyman service. from charlevoix, mi.
                                                    • CUSTOMER CARE

                                                      A:

                                                      No, the expansion tank can be mounted in any orientation.

                                                      Answered on 11/16/2011 by PexSupply Staff from NY
                                                  • THERM-X-TROL ST-5 Expansion Tank

                                                    Q:

                                                    will this model work on 30 gal residential heater?
                                                    Asked on 9/30/2011 by Dave from LA

                                                    1 answer

                                                    • CUSTOMER CARE

                                                      A:

                                                      Yes, it will.

                                                      Answered on 10/4/2011 by PexSupply Staff from NY
                                                  • THERM-X-TROL ST-5 Expansion Tank

                                                    Q:

                                                    This tank has a male SS connection. Can it be directly threaded to a female copper connection or is a dielectric connection required to prevent any corrosion long term from electrolysis.
                                                    Asked on 3/30/2011 by dbrostrain from Cary, NC

                                                    1 answer

                                                    • CUSTOMER CARE

                                                      A:

                                                      According to the manufacturer, you will not need a dielectric union and you will not get any long-term electrolysis.

                                                      Answered on 3/31/2011 by PexSupply Staff from NY
                                                  • THERM-X-TROL ST-5 Expansion Tank

                                                    Q:

                                                    how to install replacement?
                                                    Asked on 1/10/2011 by Bob from 28226

                                                    1 answer

                                                  Displaying questions 1-4

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