Amtrol® designed and patented the first Extrol diaphragm expansion tank in 1954 to control system pressure and help reduce energy consumption in heating and chilled water systems. Over six decades later, Extrol is still the world's leading expansion tank brand, setting the standard for quality, reliability and innovation. All Extrol tanks are made in the USA at our ISO registered facilities by American workers dedicated to producing the highest quality expansion tanks in the world.
$64.13
each
54 In Stock
4.4 galshow options
or for lower prices
Water-tight reservoir for expanded water
Fill-Trol® models eliminate the need for a separate automatic fill valve and tank pressure controls system fill
Suitable in propylene glycol applications with mixtures up to 50%
Thick, heavy duty Butyl/EPDM diaphragm for long service life
Sealed air cushion-factory precharged and 100% tested
12 psig factory precharge
Strong, deep-drawn steel tank
Projection welded air stem maintains precharge setting
1/2 in NPTM system connection
Accepts expanded water as system temperature rises to reduce pressure build-up
Helps reduce energy consumption and reduces system wear
Specifications
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Type: In-Line
Series: EX Series
Acceptance Capacity: 2.5 gal
Acceptance Factor: 0.57
Capacity: 4.4 gal
Diameter: 11 in
Diaphragm Type: Heavy Duty Butyl/EPDM
Domestic/Import: Domestic
Finish: Urethane Topcoat
Height: 15 in
Material: Steel Shell
Pressure Rating: 100 psig
Temperature Rating: 240 deg F
Application
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Closed Non-Potable Hydronic Heating Systems
Warranty
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5 Years Limited
*Select oversized items may incur additional shipping charges, including freight fees. Review our full Shipping Policy for details.