Expansion Tanks
We stock expansion tanks from Bell & Gossett, Armstrong, Taco HVAC, Wessels and more. Expansion Tanks are available with either bladders or diaphragms so that water and air are permanently separated. No absorption can take place at any point during the system cycle, and you avoid the problems of waterlogged tanks, air-bound terminal units, excessive corrosion, inefficient balancing and pump cavitations. Plain steel tanks are also available. Please give us a call and we can help you find the right expansion tank for your needs.
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112010 Bell & Gossett ATF-12 Airtrol Tank Fittings
Bell & Gossett
$167.95112010 Bell & Gossett ATF-12 Airtrol Tank Fittings. Connection Size: Tank - 1/2"M, Boiler - 3/4"F. Bell & Gossett Airtrol Tank Fittings help to establish proper initial liquid level in the compression tank when filling the hydronic system. They...$167.95 -
1BN327LF Bell & Gossett Expansion Tank HFT-30
Bell & Gossett
$114.951BN327LF Bell & Gossett Expansion Tank HFT-30. Bell & Gossett Non-ASME Expansion Tanks Series HFT Pre-Charged Diaphragm Technical Brochure Bell & Gossett Diaphragm Expansion Tanks ASME And Non-Code Instruction Manual Bell & Gossett...$114.95 -
1BN326 Bell & Gossett Expansion Tank HFT-15
Bell & Gossett
$68.951BN326 Bell & Gossett Expansion Tank HFT-15. The Series HFT tank is designed to absorb the force of thermal expansion of heating water and to maintain proper pressurization in a closed hydronic system. The heavy duty butyl diaphragm separates...$68.95 -
1BN319LF Bell & Gossett PT-25V Expansion Tank
Bell & Gossett
$254.951BN319LF Bell & Gossett PT-25V Expansion Tank. The Series PT expansion tank is designed to absorb the forces of expanding water and protect a potable water system from pressure build up. The FDA approved heavy duty butyl diaphragm with...$254.95 -
112013 Bell & Gossett ATF-24 Airtrol Tank Fittings
Bell & Gossett
$178.95112013 Bell & Gossett ATF-24 Airtrol Tank Fittings. Connection Size: Tank - 1/2"M, Boiler - 3/4"F. Bell & Gossett Airtrol Tank Fittings help to establish proper initial liquid level in the compression tank when filling the hydronic system. They...$178.95 -
1BN317LF Bell & Gossett PT-5 Expansion Tank
Bell & Gossett
$74.951BN317LF Bell & Gossett PT-5 Expansion Tank. The Series PT expansion tank is designed to absorb the forces of expanding water and protect a potable water system from pressure build up. The FDA approved heavy duty butyl diaphragm with...$74.95 -
1BN329 Bell & Gossett HFT-90 Expansion Tank
Bell & Gossett
$272.951BN329 Bell & Gossett HFT-90 Expansion Tank. Bell & Gossett Non-ASME Expansion Tanks Series HFT Pre-Charged Diaphragm Technical Brochure Bell & Gossett Diaphragm Expansion Tanks ASME And Non-Code Instruction Manual Bell & Gossett...$272.95 -
572005-097 Armstrong AX-15V Pre-charged ASME Expansion Tank
Armstrong
$1,592.95AX-15V Armstrong Pre-charged ASME Expansion Tank 572005-097. Tank Volume 8.0 gal, (30.3 L). *Please note image is generic. Armstrong Series AX & AX-V Diaphragm Tanks. Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80% over...$1,592.95 -
1BN318LF Bell & Gossett PT-12 Expansion Tank
Bell & Gossett
$103.951BN318LF Bell & Gossett PT-12 Expansion Tank. The Series PT expansion tank is designed to absorb the forces of expanding water and protect a potable water system from pressure build up. The FDA approved heavy duty butyl diaphragm with...$103.95 -
CBX84-125 Taco CBX Vertical Bladder Expansion Tank 22 Gal
Taco
$3,561.95CBX84-125 Taco CBX Vertical Bladder Expansion Tank 22 Gal. Tank Volume, Gal: 22, Liter: 84. *Vertical Installation Only. Taco CBX Expansion Tanks are bladder type tanks that provide permanent separation of air and water. Designed for use...$3,561.95 -
116298 Bell & Gossett Series D-15 Expansion Tank
Bell & Gossett
$1,354.95116298 Bell & Gossett Series D-15 Expansion Tank. Tank Volume: 8 Gallons (30.3L). Series "D" (ASME) Pressurized Expansion Tanks Vertical. "Not For Potable Water Systems". Bell & Gossett Expansion Tank Information: Bell & Gossett...$1,354.95 -
1BN328 Bell & Gossett HVAC Expansion Tank HFT-60
Bell & Gossett
$184.951BN328 Bell & Gossett HVAC Expansion Tank HFT-60. Information: Bell & Gossett Non-ASME Expansion Tanks Series HFT Pre-Charged Diaphragm Technical Brochure Bell & Gossett Diaphragm Expansion Tanks ASME And Non-Code Instruction...$184.95 -
572018-002 Armstrong Diaphragm Expansion Tank 30
Armstrong
$204.95572018-002 Armstrong Diaphragm Expansion Tank 30 Tank Volume 4.8 gal, (18L). Information: Armstrong NON-ASME Diaphragm Expansion Tank Submittal Sheet Armstrong Series SX Diaphragm Expansion Tank Installation Operating...$204.95 -
116300 Bell & Gossett Series D-40 ASME Expansion Tank
Bell & Gossett
$2,163.95116300 Bell & Gossett Series D-40 ASME Expansion Tank. Tank Volume: 21.7 Gallons (82.1L). Series "D" (ASME) Pressurized Expansion Tank. "Not For Potable Water Systems". Bell & Gossett Expansion Tank Information: Bell & Gossett Series...$2,163.95 -
112026 Bell & Gossett ATF-20 Airtrol Tank Fittings
Bell & Gossett
$214.95112026 Bell & Gossett ATF-20 Airtrol Tank Fittings. Connection Size: Tank - 1/2"M, Boiler - 3/4"F. Bell & Gossett Airtrol Tank Fittings help to establish proper initial liquid level in the compression tank when filling the hydronic system. They...$214.95 -
1BN330 Bell & Gossett HFT-30V Expansion Tank
Bell & Gossett
$394.951BN330 Bell & Gossett HFT-30V 14 Gallon Hydronic Heating Expansion Tank. Bell & Gossett Non-ASME Expansion Tanks Series HFT Pre-Charged Diaphragm Technical Brochure Bell & Gossett Diaphragm Expansion Tanks ASME And Non-Code Instruction...$394.95 -
AX-60V Armstrong Pre-charged ASME Expansion Tank
Armstrong
$3,127.00AX-60V Armstrong Pre-charged ASME Expansion Tank. Tank Volume 35.0 gal, (132.5 L). *Please note image is generic. Armstrong Series AX & AX-V Diaphragm Tanks. Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80% over standard...$3,127.00 -
CBX30-125 Taco CBX Vertical Bladder Expansion Tank 8 Gal
Taco
$2,759.95CBX30-125 Taco CBX Vertical Bladder Expansion Tank 8 Gal. Tank Volume, Gal: 8, Liter: 30. *Vertical Installation Only. Taco CBX Expansion Tanks are bladder type tanks that provide permanent separation of air and water. Designed for use...$2,759.95 -
PTA-60V Bell & Gossett 1BN351LF ASME Potable Expansion Tank
Bell & Gossett
$3,755.95PTA-60V Bell & Gossett 1BN351LF ASME Potable Expansion Tank. The Bell & Gossett Series PTA expansion tank is an ASME constructed vessel designed to absorb the forces of expanding water and protect the domestic water system from pressure...$3,755.95 -
PTA-42V Bell & Gossett 1BN350LF ASME Potable Expansion Tank
Bell & Gossett
$2,910.95PTA-42V Bell & Gossett 1BN350LF ASME Potable Expansion Tank. The Bell & Gossett Series PTA expansion tank is an ASME constructed vessel designed to absorb the forces of expanding water and protect the domestic water system from...$2,910.95 -
572005-101 Armstrong AX-80V Pre-charged ASME Expansion Tank
Armstrong
$3,548.00AX-80V Armstrong 572005-101 Pre-charged ASME Expansion Tank. Tank Volume 45.0 gal, (170.3 L). *Please note image is generic. Armstrong Series AX & AX-V Diaphragm Tanks. Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80%...$3,548.00 -
PAX130-150 Taco Bladder Expansion Tank
Taco
$2,918.80PAX130-150 Taco Bladder Expansion Tank. Tank Volume: 34 gal, 129 liter. Taco PAX Series bladder type tanks provide permanent separation of air and water. All wetted components are built of FDA-approved materials. Available in 11 models to meet all...$2,918.80 -
572018-003 Armstrong Diaphragm Expansion Tank 60
Armstrong
$561.95572018-003 Armstrong Diaphragm Expansion Tank 60 Tank Volume 6.3 gal, (24L). Information: Armstrong NON-ASME Diaphragm Expansion Tank Submittal Sheet Armstrong Series SX Diaphragm Expansion Tank Installation Operating...$561.95 -
BB-18 Boiler Buddy Buffer Tank 18 Gallon
Boiler Buddy
$1,758.95BB-18 Boiler Buddy Buffer Tank 18 Gallon. The Boiler Buddy is designed to be used in heating systems with low-mass boilers, geothermal, chilled water applications, or low-mass radiation. Boilers operating at low loads will short cycle which leads to...$1,758.95 -
BB-30 Boiler Buddy Buffer Tank 30 Gallon
Boiler Buddy
$1,798.95BB-30 Boiler Buddy Buffer Tank 30 Gallon. The Boiler Buddy is designed to be used in heating systems with low-mass boilers, geothermal, chilled water applications, or low-mass radiation. Boilers operating at low loads will short cycle which leads to...$1,798.95 -
572005-099 Armstrong AX-40V Pre-charged ASME Expansion Tank
Armstrong
$2,871.00572005-099 Armstrong AX-40V Pre-charged ASME Expansion Tank . Tank Volume 25.0 gal, (94.6 L). *Please note image is generic. Armstrong Series AX & AX-V Diaphragm Tanks. Armstrong Expansion Tanks are designed to reduce tank sizes by...$2,871.00 -
220001 Bell & Gossett Sight Glass Assembly
Bell & Gossett
$124.95220001 Bell & Gossett Sight Glass Assembly, 2 gauge cocks, glass tube 12" & guard rods. This Item Usually Ships The Same Day!$124.95 -
CX84-125 Taco 23 Gal Diaphragm Expansion Tank
Taco
$2,358.95CX84-125 Taco Diaphragm 23 Gal Expansion Tank. Tank Volume: 23 Gal, 84 Lit. Taco Series CX Expansion Tanks. Most Taco Expansion Tanks are available with either bladders or diaphragms so that water and air are permanently separated. The Taco...$2,358.95 -
CX30-125 Taco 8 Gal Diaphragm Expansion Tank
Taco
$1,928.95CX30-125 Taco Diaphragm 8 Gal Expansion Tank. Tank Volume: 8 Gal, 30 Lit. Taco Series CX Expansion Tanks. Most Taco Expansion Tanks are available with either bladders or diaphragms so that water and air are permanently separated. The Taco...$1,928.95 -
113235 Bell & Gossett TPV-1FF Tank Purge Valve
Bell & Gossett
$108.95113235 Bell & Gossett TPV-1FF Tank Purge Valve. System Connection: 1" Female NPT - Tank Connection: 1" Female NPT. The Bell & Gossett Tank Purge Valve (TPV) is a combination full port ball type isolation valve and drain valve used to connect the...$108.95 -
2220130 Wessels Series NLA-130 Expansion Tank Bladder Only
Wessels
$988.952220130 Wessels Series NLA-130 Expansion Tank Bladder Only. Wessels bladder expansion tanks are required in a closed loop heating or chilled water HVAC system to absorb the expanding fluid and limit the pressure within a heating or cooling system. A...$988.95 -
572018-007 Armstrong Diaphragm Expansion Tank SX-60V
Armstrong
$742.95572018-007 Armstrong Diaphragm Expansion Tank SX-60V. Tank Volume 39.7 gal, (150L). Information: Armstrong NON-ASME Diaphragm Expansion Tank Submittal Sheet Armstrong Series SX Diaphragm Expansion Tank Installation Operating...$742.95 -
1BN320LF Bell & Gossett PT-30V Expansion Tank
Bell & Gossett
$348.951BN320LF Bell & Gossett PT-30V Expansion Tank. The Series PT expansion tank is designed to absorb the forces of expanding water and protect a potable water system from pressure build up. The FDA approved heavy duty butyl diaphragm with...$348.95 -
12NA33 Wessels Series NA Hydronic Expansion Tank 23012033
Wessels
$728.9512NA33 Wessels Series NA Hydronic Expansion Tank 23012033, 15 Gal. Wessels NA series are ASME plain carbon steel expansion tanks. They are designed to absorb the expansion forces and control the pressure in heating/cooling systems. This tank is the...$728.95 -
CBX254-125 Taco 600-9613RP Expansion Tank Bladder Only
Taco
$3,173.40CBX254-125 Taco 600-9613RP Expansion Tank Bladder Only. *Vertical Installation Only. Taco CBX Expansion Tanks are bladder type tanks that provide permanent separation of air and water. Designed for use in hydronic systems and non-potable,...$3,173.40 -
CBX254-125 Taco CBX Vertical Bladder Expansion Tank 67 Gal
Taco
$5,427.95CBX254-125 Taco CBX Vertical Bladder Expansion Tank 67 Gal. Tank Volume, Gal: 67, Liter: 254. *Vertical Installation Only. Taco CBX Expansion Tanks are bladder type tanks that provide permanent separation of air and water. Designed for...$5,427.95 -
CBX170-125 Taco CBX Vertical Bladder Expansion Tank 45 Gal
Taco
$4,781.95CBX170-125 Taco CBX Vertical Bladder Expansion Tank 45 Gal. Tank Volume, Gal: 45, Liter: 170. *Vertical Installation Only. Taco CBX Expansion Tanks are bladder type tanks that provide permanent separation of air and water. Designed for...$4,781.95 -
CBX130-125 Taco CBX Vertical Bladder Expansion Tank 34 Gal
Taco
$4,657.00CBX130-125 Taco CBX Vertical Bladder Expansion Tank 34 Gal. Tank Volume, Gal: 34, Liter: 130. *Vertical Installation Only. Taco CBX Expansion Tanks are bladder type tanks that provide permanent separation of air and water. Designed for...$4,657.00 -
PAX170-150 Taco Bladder Expansion Tank
Taco
$3,427.95PAX170-150 Taco Bladder Expansion Tank. Acceptance Volume: 45 gal, 170 liter. Taco PAX Series bladder type tanks provide permanent separation of air and water. All wetted components are built of FDA-approved materials. Available in 11 models to meet...$3,427.95 -
PAX84-150 Taco Bladder Expansion Tank
Taco
$3,278.00PAX84-150 Taco Bladder Expansion Tank. Acceptance Volume: 12 gal, 45 liter. Taco PAX Series bladder type tanks provide permanent separation of air and water. All wetted components are built of FDA-approved materials. Available in 11 models to meet...$3,278.00