Expansion Tanks for Heating

Expansion Tanks for Heating

Amtrol manufactures a wide variety of expansion tanks for heating applications, including residential and commercial hydronic baseboard/radiators heating systems and radiant floor heating systems.
Amtrol heating expansion tank series include:
Extrol - the most popular expansion tank used for closed loop hydronic and radiant heating applications;
Fill-Trol - comprised of an Extrol series tank with a fill valve;
Radiant Extrol - for open loop heating systems or systems with high dissolved oxygen content in water;

17 products
Sort by: List Grid
Part#: 101-1 | Brand: Amtrol
 (4)
In Stock | Pick Up available
x1
$23.55/each
x4
$90.20/box
($22.55/each)
Add to cartAdd to cart
Part#: 598-0210 | Brand: Sioux Chief
In Stock | Pick Up available
x1
$2.95/each
x10
$28.00
($2.80/each)
Add to cartAdd to cart
Part#: 102-1 | Brand: Amtrol
 (3)
In Stock | Pick Up available
x1
$28.95/each
x4
$111.80/box
($27.95/each)
Add to cartAdd to cart
Part#: 103-1 | Brand: Amtrol
 (1)
In Stock | Pick Up available
x1
$59.95/each
x4
$231.80/box
($57.95/each)
Add to cartAdd to cart
Part#: 598-0213 | Brand: Sioux Chief
In Stock | Pick Up available
x1
$3.35/each
x10
$31.80
($3.18/each)
Add to cartAdd to cart
Part#: 112-1 | Brand: Amtrol
In Stock | Pick Up available
x1
$92.95/each
x4
$355.80
($88.95/each)
Add to cartAdd to cart
Part#: 118-27 | Brand: Amtrol
 (1)
In Stock | Pick Up available
x1
$98.95/each
Add to cartAdd to cart
Part#: 118-78 | Brand: Amtrol
Temporarily Out of Stock
x1
$139.95/each
+ Free Shipping
Add to cartAdd to cart
Part#: 118-79 | Brand: Amtrol
In Stock | Pick Up available
x1
$209.95/each
+ Free Shipping
Add to cartAdd to cart
Part#: 118-153 | Brand: Amtrol
Ships within 7-10 business days
x1
$389.95/each
+ Free Shipping
Add to cartAdd to cart
Part#: 109-1 | Brand: Amtrol
 (1)
In Stock | Pick Up available
x1
$65.95/each
x4
$254.00/box
($63.50/each)
Add to cartAdd to cart
Part#: 110-1 | Brand: Amtrol
 (2)
In Stock | Pick Up available
x1
$75.95/each
x4
$295.80/box
($73.95/each)
Add to cartAdd to cart
Part#: 111-1 | Brand: Amtrol
Temporarily Out of Stock
x1
$119.95/each
+ Free Shipping
Add to cartAdd to cart
Part#: 140-705 | Brand: Amtrol
Temporarily Out of Stock
x1
$48.95/each
x4
$187.80/box
($46.95/each)
Add to cartAdd to cart
Part#: 141-305 | Brand: Amtrol
In Stock | Pick Up available
x1
$60.95/each
x4
$235.80/box
($58.95/each)
Add to cartAdd to cart
Part#: 143-381 | Brand: Amtrol
In Stock | Pick Up available
x1
$148.95/each
x2
$289.90/box
($144.95/each)
Free Shipping on any qty
Add to cartAdd to cart
Part#: 41672 | Brand: Webstone Valves
 (2)
In Stock | Pick Up available
x1
$14.65/each
x10
$140.50/box
($14.05/each)
Add to cartAdd to cart

About Expansion Tanks For Hydronic Heating

A diaphragm type expansion tank is a required component in a hot water hydronic heating system. The tank is constructed of a welded drawn steel body with an internal diaphragm, which internally separates it into (2) chambers. One of the chambers is filled with pressurized air. The other has a threaded inlet and is connected to the supply line near the boiler. As water is heated by the boiler, it expands, an is accommodated by the hydronic expansion tank, with air pressurized chamber acting like a cushion. This prevents formation of excess pressure which may cause damage to systems' components and prevents the frequent discharge of the pressure relief valve.
The following was added to your shopping cart: ×