Expansion Tanks

Expansion Tanks

Bell & Gossett Expansion Tanks
Armstrong Expansion Tanks
Taco Comfort Solutions 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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  • 1BN327LF Bell & Gossett Expansion Tank HFT-30
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    1BN327LF Bell & Gossett Expansion Tank HFT-30

    Bell & Gossett

    $84.95
    1BN327LF 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...
    $84.95
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    $84.95
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  • 1BN326 Bell & Gossett Expansion Tank HFT-15
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    1BN326 Bell & Gossett Expansion Tank HFT-15

    Bell & Gossett

    $68.95
    1BN326 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
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    $68.95
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  • 112010 Bell & Gossett ATF-12 Airtrol Tank Fittings
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    112010 Bell & Gossett ATF-12 Airtrol Tank Fittings

    Bell & Gossett

    $138.00
    112010 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...
    $138.00
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    $138.00
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  • 1BN319LF Bell & Gossett PT-25V Expansion Tank
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    1BN319LF Bell & Gossett PT-25V Expansion Tank

    Bell & Gossett

    $178.70
    1BN319LF 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...
    $178.70
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    $178.70
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  • 572005-097 Armstrong AX-15V Pre-charged ASME Expansion Tank
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    572005-097 Armstrong AX-15V Pre-charged ASME Expansion Tank

    Armstrong

    $1,192.95
    AX-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...
    $1,192.95
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    $1,192.95
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  • 1BN329 Bell & Gossett HFT-90 Expansion Tank
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    1BN329 Bell & Gossett HFT-90 Expansion Tank

    Bell & Gossett

    $258.95
    1BN329 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...
    $258.95
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    $258.95
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  • 1BN318LF Bell & Gossett PT-12 Expansion Tank
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    1BN318LF Bell & Gossett PT-12 Expansion Tank

    Bell & Gossett

    $93.95
    1BN318LF 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...
    $93.95
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    $93.95
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  • 1BN317LF Bell & Gossett PT-5 Expansion Tank
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    1BN317LF Bell & Gossett PT-5 Expansion Tank

    Bell & Gossett

    $74.95
    1BN317LF 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
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    $74.95
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  • 572018-002 Armstrong Diaphragm Expansion Tank 30
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    572018-002 Armstrong Diaphragm Expansion Tank 30

    Armstrong

    $204.95
    572018-002 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
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    $204.95
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  • 116300 Bell & Gossett Series D-40 ASME Expansion Tank
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    116300 Bell & Gossett Series D-40 ASME Expansion Tank

    Bell & Gossett

    $2,163.95
    116300 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
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    $2,163.95
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  • 116298 Bell & Gossett Series D-15 Expansion Tank
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    116298 Bell & Gossett Series D-15 Expansion Tank

    Bell & Gossett

    $1,354.95
    116298 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
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    $1,354.95
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  • 1BN328 Bell & Gossett HVAC Expansion Tank HFT-60
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    1BN328 Bell & Gossett HVAC Expansion Tank HFT-60

    Bell & Gossett

    $184.95
    1BN328 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
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    $184.95
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  • 112013 Bell & Gossett ATF-24 Airtrol Tank Fittings
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    112013 Bell & Gossett ATF-24 Airtrol Tank Fittings

    Bell & Gossett

    $178.95
    112013 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
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    $178.95
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  • CBX15-125 Taco CBX Vertical Bladder Expansion Tank 4 Gal
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    CBX84-125 Taco CBX Vertical Bladder Expansion Tank 22 Gal

    Taco

    $2,846.95
    CBX84-125 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...
    $2,846.95
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    $2,846.95
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  • CBX30-125 Taco CBX Vertical Bladder Expansion Tank 8 Gal
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    CBX30-125 Taco CBX Vertical Bladder Expansion Tank 8 Gal

    Taco

    $1,958.95
    CBX30-125 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...
    $1,958.95
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    $1,958.95
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  • PTA-42V Bell & Gossett 1BN350LF ASME Potable Expansion Tank
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    PTA-42V Bell & Gossett 1BN350LF ASME Potable Expansion Tank

    Bell & Gossett

    $2,910.95
    PTA-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
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    $2,910.95
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  • 1BN330 Bell & Gossett HFT-30V Expansion Tank
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    1BN330 Bell & Gossett HFT-30V Expansion Tank

    Bell & Gossett

    $294.95
    1BN330 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...
    $294.95
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    $294.95
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  • 572005-101 Armstrong AX-80V Pre-charged ASME Expansion Tank
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    572005-101 Armstrong AX-80V Pre-charged ASME Expansion Tank

    Armstrong

    $1,948.95
    AX-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%...
    $1,948.95
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    $1,948.95
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  • AX-60V Armstrong Pre-charged ASME Expansion Tank
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    AX-60V Armstrong Pre-charged ASME Expansion Tank

    Armstrong

    $1,995.00
    AX-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...
    $1,995.00
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    $1,995.00
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  • PAX130-150 Taco Bladder Expansion Tank
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    PAX130-150 Taco Bladder Expansion Tank

    Taco

    $2,918.80
    PAX130-150 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
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    $2,918.80
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  • PTA-60V Bell & Gossett 1BN351LF ASME Potable Expansion Tank
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    PTA-60V Bell & Gossett 1BN351LF ASME Potable Expansion Tank

    Bell & Gossett

    $3,755.95
    PTA-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
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    $3,755.95
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  • 112026 Bell & Gossett ATF-20 Airtrol Tank Fittings
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    112026 Bell & Gossett ATF-20 Airtrol Tank Fittings

    Bell & Gossett

    $214.95
    112026 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
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    $214.95
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  • 220001 Bell & Gossett Sight Glass Assembly
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    220001 Bell & Gossett Sight Glass Assembly

    Bell & Gossett

    $124.95
    220001 Bell & Gossett Sight Glass Assembly, 2 gauge cocks, glass tube 12" & guard rods. This Item Usually Ships The Same Day!
    $124.95
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    $124.95
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  • CX30-125 Taco Diaphragm 8 Gal Expansion Tank
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    CX30-125 Taco 8 Gal Diaphragm Expansion Tank

    Taco

    $1,628.95
    CX30-125 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...
    $1,628.95
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    $1,628.95
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  • 113235 Bell & Gossett TPV-1FF Tank Purge Valve
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    113235 Bell & Gossett TPV-1FF Tank Purge Valve

    Bell & Gossett

    $108.95
    113235 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
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    $108.95
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  • CX84-125 Taco Diaphragm 23 Gal Expansion Tank
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    CX84-125 Taco 23 Gal Diaphragm Expansion Tank

    Taco

    $1,628.60
    CX84-125 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...
    $1,628.60
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    $1,628.60
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  • 572018-007 Armstrong Diaphragm Expansion Tank SX-60V
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    572018-007 Armstrong Diaphragm Expansion Tank SX-60V

    Armstrong

    $742.95
    572018-007 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
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    $742.95
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  • BB-18 Boiler Buddy Buffer Tank 18 Gallon
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    BB-18 Boiler Buddy Buffer Tank 18 Gallon

    Boiler Buddy

    $1,322.95
    BB-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...
    $1,322.95
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    Qty in Cart: 0
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    $1,322.95
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  • CBX254-125 Taco 600-9613RP Expansion Tank Bladder Only
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    CBX254-125 Taco 600-9613RP Expansion Tank Bladder Only

    Taco

    $3,173.40
    CBX254-125 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
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    Qty in Cart: 0
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    $3,173.40
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  • 572005-099 Armstrong AX-40V Pre-charged  ASME Expansion Tank
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    572005-099 Armstrong AX-40V Pre-charged ASME Expansion Tank

    Armstrong

    $1,545.00
    572005-099 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...
    $1,545.00
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    Qty in Cart: 0
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    $1,545.00
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  • CBX254-125 Taco CBX Vertical Bladder Expansion Tank 67 Gal
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    CBX254-125 Taco CBX Vertical Bladder Expansion Tank 67 Gal

    Taco

    $3,241.00
    CBX254-125 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...
    $3,241.00
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    $3,241.00
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  • CBX170-125 Taco CBX Vertical Bladder Expansion Tank 45 Gal
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    CBX170-125 Taco CBX Vertical Bladder Expansion Tank 45 Gal

    Taco

    $2,887.50
    CBX170-125 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...
    $2,887.50
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    $2,887.50
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  • CBX130-125 Taco CBX Vertical Bladder Expansion Tank 34 Gal
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    CBX130-125 Taco CBX Vertical Bladder Expansion Tank 34 Gal

    Taco

    $2,957.00
    CBX130-125 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...
    $2,957.00
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    $2,957.00
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  • PAX84-150 Taco Bladder Expansion Tank
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    PAX84-150 Taco Bladder Expansion Tank

    Taco

    $3,278.00
    PAX84-150 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
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    $3,278.00
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  • 1BN320LF Bell & Gossett PT-30V Expansion Tank
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    1BN320LF Bell & Gossett PT-30V Expansion Tank

    Bell & Gossett

    $348.95
    1BN320LF 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
    Add to Cart
    Qty in Cart: 0
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    $348.95
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  • BB-30 Boiler Buddy Buffer Tank 30 Gallon
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    BB-30 Boiler Buddy Buffer Tank 30 Gallon

    Boiler Buddy

    $1,538.95
    BB-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...
    $1,538.95
    Add to Cart
    Qty in Cart: 0
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    Price:
    $1,538.95
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  • 572006-303 Armstrong AST-30 ASME Pre-Pressurized Expansion Tank
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    572006-303 Armstrong AST-30 ASME Pre-Pressurized Expansion Tank

    Armstrong

    $1,962.90
    572006-303 Armstrong AST-30 ASME Pre-Pressurized Hydro-Pneumatic Expansion Tank. Volume Acceptance USGal (10.5) / Tank (15.0). Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80% over standard designs. Expansion tanks use...
    $1,962.90
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    $1,962.90
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  • CX300-125 Taco 79 Gal Diaphragm Expansion Tank
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    CX300-125 Taco 79 Gal Diaphragm Expansion Tank

    Taco

    $2,127.25
    CX300-125 Taco 79 Gal Diaphragm Expansion Tank. Tank Volume: 79 Gal, 300 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...
    $2,127.25
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    $2,127.25
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  • CBX300-125 Taco CBX Vertical Bladder Expansion Tank 79 Gal
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    CBX300-125 Taco CBX Vertical Bladder Expansion Tank 79 Gal

    Taco

    $4,281.95
    CBX300-125 Taco CBX Vertical Bladder Expansion Tank 79 Gal. Tank Volume, Gal: 79,  Liter: 300.  *Vertical Installation Only. Taco CBX Expansion Tanks are bladder type tanks that provide permanent separation of air and water. Designed for...
    $4,281.95
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    $4,281.95
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  • CA140-125 Taco CA Expansion Tank
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    CA140-125 Taco CA Expansion Tank

    Taco

    $4,157.00
    CA140-125 Taco CA Expansion Tank. Tank Volume: 37 Gal. 140 Liter. Standard Design Pressure and Temperature: 125 psi @ 240*F Max. Suitable for Vertical or Horizontal Installation. Information: Taco Series CA Expansion Tank Brochure Taco Series...
    $4,157.00
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    Qty in Cart: 0
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    $4,157.00
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