Extrol #15 Expansion Tank (2.0 Gal Volume)


Brand: Amtrol

Mfr Part#: 101-1

Model: #15

UPC#: 642031112743

Availability: In Stock
Usually ships: within 1 business day
Qty Price
$24.95 / each
x4 $95.80 / box
(4 x $23.95 / each)
  • Description
  • Literature
  • Reviews (4)
  • FAQs (3)

Extrol #15 Applications:
Closed loop hydronic heating and radiant heating applications;

Technical Specifications:

  • Factory pre-charged 12 psi;
  • System connection: 1/2" threaded;
  • Max. operating temperature: 240F;
  • Max. operating pressure: 100 psi;
  • Expansion tank volume: 2.0 gallons;
  • Max. accepted volume: 0.9 gallons;
  • Height: 12-5/8";
  • Diameter: 8";
  • Shipping weight: 5 lbs;


5-year manufacturer's warranty.
Extrol #15 Expansion Tank (2.0 Gal Volume) has an average 5.0 out of 5 rating based on 4 user reviews.
1 of 1 people found this review helpful.
Glad I found this.
By HeyNeighbor (from Vancouver, WA) on 5/1/2011
"I always like to support industry pioneers, especially when they don't take their status for granted. The price point of this tank is exceptional, and Amtrol components have been essential parts of my closed-loop solar system for years. After adding a 3rd panel, the need for a pressure relief buffer developed when our system would maximize at 180 and panel boil-off at shutdown and drainback would occur. This pressure spike would trigger our 20# pressure relief valve, resulting in compounding loss of circulating fluid. This looks to be the perfect physical fit and solution, with minimal modifications necessary to the existing layout. Quality seems excellent."
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excellent company
By Dan (from 14843) on 11/26/2015
Very fast shipping
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As promised
By Larry B. (from New Bern, NC) on 7/13/2012
This is to replace an identical unit and the price was ideal. Fast shipping, good communications
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Great Prices
By Greg (from Owatonna) on 1/9/2012
Great prices, super shipping and web site.
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Should this tank be used on the closed side of a radiant heating system instead of the domestic water Amtrol ST-5? On the open side I am using a Amtrol ST-5 but the closed side requires a lot less psi @12.
Read 1 answer
You will need to use the tank on the closed side of the radiant as well. Size of the tank can be determined using Amtrol guidelines in the Brochure (see "Literature" tab).
Answered on 3/12/2018 by PexUniverse Customer Service
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Can I use this tank for my domestic hot water and can this tank be mounted sideways instead of vertical
Read 1 answer
No and no. The Extrol series is for closed loop heating applications only. These tanks are for vertical installation only since horizontal mounting will create uneven pressure at the connection. For domestic hot water applications, you'll need Therm-X-Trol series.
Answered on 6/3/2015 by PexUniverse Customer Service
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Hi, Is there a way I can test my Amtrol 15 tank to know if the bladder is still good? Been having some problems with my floor heat. We fixed a leaky pipe but still don't have any pressure. Thinking I would put 15 psi in it and see if it sticks. Is that the best way to test that? How soon would I know if the bladder is working? Thanks
Read 1 answer
The air valve on the expansion tank is Schrader type, so a regular gauge used to check tire pressure could be used.
Answered on 10/18/2012 by PexUniverse Customer Service
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