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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572006-305 Armstrong AST-60 ASME Pre-Pressurized Expansion Tank
Armstrong
$2,598.75572006-305 Armstrong AST-60 ASME Pre-Pressurized Hydro-Pneumatic Expansion Tank. Volume Acceptance USGal (15.5) / Tank (26.0). Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80% over standard designs. Expansion tanks use...$2,598.75 -
572006-301 Armstrong AST-12 ASME Pre-Pressurized Expansion Tank
Armstrong
$1,542.60572006-301 Armstrong AST-12 ASME Pre-Pressurized Hydro-Pneumatic Expansion Tank. Volume Acceptance USGal (3.1) / Tank (5.0). Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80% over standard designs. Expansion tanks use...$1,542.60 -
572006-300 Armstrong AST-5 ASME Pre-Pressurized Expansion Tank
Armstrong
$1,368.60572006-300 Armstrong AST-5 ASME Pre-Pressurized Hydro-Pneumatic Expansion Tank. Volume Acceptance USGal (2.1) / Tank (3.5). Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80% over standard designs. Expansion tanks use...$1,368.60 -
WX-600-L Armstrong 510110-001 Replacement Bladder Only
Armstrong
$6,481.95WX-600-L Armstrong 510110-001 Replacement Bladder Only. This Bladder fits Armstrong Model WX-600-L Armstrong Part Number 572006-400. Please note image is of tank and not bladder. Tank not included. Information: Armstrong Series WX-L ASME Pre...$6,481.95 -
WX-600-L Armstrong 572006-400 (ASME) Potable Water Expansion Tank
Armstrong
$8,177.95WX-600-L Armstrong 572006-400 (ASME) Potable Water Expansion Tank. Tank Volume Gal/L: 158(600). Designed and constructed per ASME, section VIII, division 1. California code sight-glass available upon request. Allow a minimum of 18" (457mm) clearance...$8,177.95 -
Taco 600-185RP Replacement Hose
Taco
$198.60Taco 600-185RP Replacement Hose. Taco Series CA Captive Air bladder expansion tanks are designed to solve a long-time problem in the hydronics industry. In old style, plain steel tanks, the direct air-to-water interface can allow the air to be...$198.60 -
CA500-125 Taco CA Expansion Tank
Taco
$9,652.70CA500-125 Taco CA Expansion Tank. Tank Volume: 132 Gal. 500 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...$9,652.70 -
189579 Bell & Gossett Series B-200 ASME Expansion Tank Bladder Only
Bell & Gossett
$3,961.95189579 Bell & Gossett Series B-200 Expansion Tank Replacement Bladder Only. Tank And Acceptance Volume Gallons: 53 Gallons (200) liters. Bell & Gossett Pre-charged Bladder & Diaphragm Tanks ASME (B,D,B-LA). Please Contact Us For Lead...$3,961.95 -
189581 Bell & Gossett Series B-400 ASME Expansion Tank Bladder Only
Bell & Gossett
$4,781.95189581 Bell & Gossett Series B-400 ASME Expansion Tank Bladder Only. Tank And Acceptance Volume Gallons: 106 Gallons (400) liters. Bell & Gossett Pre-charged Bladder & Diaphragm Tanks ASME (B,D,B-LA). Please Contact Us For Lead Time...$4,781.95 -
1BN308LF Bell & Gossett WTA-453 ASME Domestic Well Tank
Bell & Gossett
$11,376.951BN308LF Bell & Gossett WTA-453 ASME Domestic Well Tank. Tank Volume Gallons: 264G, 171.6L. For Potable Well Water Systems. "WTA" Well Water Tanks (ASME Construction) Designed for Potable Well Water and Booster Pump Systems. Bell & Gossett...$11,376.95 -
1BN379LF Bell & Gossett WTA-452 ASME Domestic Well Tank
Bell & Gossett
$9,652.951BN379LF Bell & Gossett WTA-452 ASME Domestic Well Tank. Tank Volume Gallons: 211. For Potable Well Water Systems. "WTA" Well Water Tanks (ASME Construction) Designed for Potable Well Water and Booster Pump Systems. Information: Bell...$9,652.95 -
189594 Bell & Gossett B-35, B-50,B-85 & B-100 LA Replacement Bladder Only
Bell & Gossett
$2,677.95189594 Bell & Gossett B-35, B-50,B-85 & B-100 LA Replacement Bladder Only. Bell & Gossett Pre-charged Bladder & Diaphragm Tanks ASME (B,D,B-LA). Please Contact Us For Lead Time & Pricing. If you have questions you can also email...$2,677.95 -
PS515-125 Taco PS Expansion Tank 515 Gal
Taco
$8,162.90PS515-125 Taco PS Expansion Tank 515 Gal. Capacity (Gal) 515. Specifications: Manufactured in Accordance with ASME Section VIII. Maximum working pressure - 125 PSIG (optional 150 PSIG, -150 in Model No.). Maximum Operating Temperature - 375*F. Taco...$8,162.90 -
PS400-125 Taco PS Expansion Tank 400 Gal
Taco
$5,292.55PS400-125 Taco PS Expansion Tank 400 Gal. Capacity (Gal) 400. Specifications: Manufactured in Accordance with ASME Section VIII. Maximum working pressure - 125 PSIG (optional 150 PSIG, -150 in Model No.). Maximum Operating Temperature - 375*F. Taco...$5,292.55 -
PS300-125 Taco PS Expansion Tank 300 Gal
Taco
$4,698.75PS300-125 Taco PS Expansion Tank 300 Gal. Capacity (Gal) 300. Specifications: Manufactured in Accordance with ASME Section VIII. Maximum working pressure - 125 PSIG (optional 150 PSIG, -150 in Model No.). Maximum Operating Temperature - 375*F. Taco...$4,698.75 -
PS240-125 Taco PS Expansion Tank 240 Gal
Taco
$3,778.40PS240-125 Taco PS Expansion Tank 240 Gal. Capacity (Gal) 240. Specifications: Manufactured in Accordance with ASME Section VIII. Maximum working pressure - 125 PSIG (optional 150 PSIG, -150 in Model No.). Maximum Operating Temperature - 375*F. Taco...$3,778.40 -
PS220-125 Taco PS Expansion Tank 220 Gal
Taco
$3,568.55PS220-125 Taco PS Expansion Tank 220 Gal. Capacity (Gal) 220. Specifications: Manufactured in Accordance with ASME Section VIII. Maximum working pressure - 125 PSIG (optional 150 PSIG, -150 in Model No.). Maximum Operating Temperature - 375*F. Taco...$3,568.55 -
PS180-125 Taco PS Expansion Tank 180 Gal
Taco
$3,298.95PS180-125 Taco PS Expansion Tank 180 Gal. Capacity (Gal) 180. Specifications: Manufactured in Accordance with ASME Section VIII. Maximum working pressure - 125 PSIG (optional 150 PSIG, -150 in Model No.). Maximum Operating Temperature - 375*F. Taco...$3,298.95 -
PS100-125 Taco PS Expansion Tank 100 Gal
Taco
$2,298.60PS100-125 Taco PS Expansion Tank 100 Gal. Capacity (Gal) 100. Specifications: Manufactured in Accordance with ASME Section VIII. Maximum working pressure - 125 PSIG (optional 150 PSIG, -150 in Model No.). Maximum Operating Temperature - 375*F. Taco...$2,298.60 -
PS060-125 Taco PS Expansion Tank 60 Gal
Taco
$1,625.65PS060-125 Taco PS Expansion Tank 60 Gal. Capacity (Gal) 60. Specifications: Manufactured in Accordance with ASME Section VIII. Maximum working pressure - 125 PSIG (optional 150 PSIG, -150 in Model No.). Maximum Operating Temperature - 375*F. Taco...$1,625.65 -
CX254-125 Taco 67 Gal Diaphragm Expansion Tank
Taco
$3,571.95CX254-125 Taco 67 Gal Diaphragm Expansion Tank. Tank Volume: 67 Gal, 254 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...$3,571.95 -
CBX500-125 Taco CBX Vertical Bladder Expansion Tank 132 Gal
Taco
$8,761.95CBX500-125 Taco CBX Vertical Bladder Expansion Tank 132 Gal. Tank Volume, Gal: 132, Liter: 500. *Vertical Installation Only. Taco CBX Expansion Tanks are bladder type tanks that provide permanent separation of air and water. Designed for...$8,761.95 -
CBX42-125 Taco CBX Vertical Bladder Expansion Tank 11 Gal
Taco
$2,973.95CBX42-125 Taco CBX Vertical Bladder Expansion Tank 11 Gal. Tank Volume, Gal: 11, Liter: 42. *Vertical Installation Only. Taco CBX Expansion Tanks are bladder type tanks that provide permanent separation of air and water. Designed for use...$2,973.95 -
PAX500-150 Taco Bladder Expansion Tank
Taco
$5,671.00PAX500-150 Taco Bladder Expansion Tank. Tank Volume: 132 gal, 500 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...$5,671.00 -
PAX350-150 Taco Bladder Expansion Tank
Taco
$5,461.00PAX350-150 Taco Bladder Expansion Tank. Tank Volume: 92 gal, 348 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...$5,461.00 -
573100-010 Armstrong A600-L Expansion Tank
Armstrong
$8,381.95573100-010 Armstrong A600-L Expansion Tank. Tank Volume Gal/L: 158(600). Armstrong Series L Bladder Expansion Tanks. Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80% over standard designs. Expansion tanks use compressed air to...$8,381.95 -
573100-009 Armstrong A500-L Expansion Tank
Armstrong
$6,912.95573100-009 Armstrong A500-L Expansion Tank. Tank Volume Gal/L: 132(500). Armstrong Series L Bladder Expansion Tanks. Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80% over standard designs. Expansion tanks use compressed air to...$6,912.95 -
PAX42-150 Taco Bladder Expansion Tank
Taco
$2,672.95PAX42-150 Taco Bladder Expansion Tank. Acceptance Volume: 5 gal, 19 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...$2,672.95 -
1BN103LF Bell & Gossett WT-403 Domestic Well Tank
Bell & Gossett
$1,492.851BN103LF Bell & Gossett WT-403 Domestic Well Tank. Bell & Gossett None-ASME Domestic Well Tanks. The Series WT expansion tank will help protect the pump and pressure switches against short cycling. The Potable well tank delivers adequate water...$1,492.85 -
1BN102LF Bell & Gossett WT-402 Domestic Well Tank
Bell & Gossett
$1,472.551BN102LF Bell & Gossett WT-402 Domestic Well Tank. Bell & Gossett None-ASME Domestic Well Tanks. The Series WT expansion tank will help protect the pump and pressure switches against short cycling. The Potable well tank delivers adequate water...$1,472.55 -
1BN372LF Bell & Gossett WTA-404 ASME Domestic Well Tank
Bell & Gossett
$4,893.951BN372LF Bell & Gossett WTA-404 ASME Domestic Well Tank. Tank Volume Gallons: 68 (257L). For Potable Well Water Systems. "WTA" Well Water Tanks (ASME Construction) Designed for Potable Well Water and Booster Pump Systems. Bell & Gossett ASME...$4,893.95 -
1BN153LF Bell & Gossett WTA-403 ASME Domestic Well Tank
Bell & Gossett
$5,278.951BN153LF Bell & Gossett WTA-403 ASME Domestic Well Tank. Tank Volume Gallons: 34 (129L). For Potable Well Water Systems. "WTA" Well Water Tanks (ASME Construction) Designed for Potable Well Water and Booster Pump Systems. Bell & Gossett ASME...$5,278.95 -
1BN152LF Bell & Gossett WTA-402 ASME Domestic Well Tank
Bell & Gossett
$5,487.951BN152LF Bell & Gossett WTA-402 ASME Domestic Well Tank. Tank Volume Gallons: 25 (95L). For Potable Well Water Systems. "WTA" Well Water Tanks (ASME Construction) Designed for Potable Well Water and Booster Pump Systems. Bell & Gossett ASME...$5,487.95 -
1BN377LF Bell & Gossett WTA-450 ASME Domestic Well Tank
Bell & Gossett
$8,655.001BN377LF Bell & Gossett WTA-450 ASME Domestic Well Tank. Tank Volume Gallons: 132 (500L). For Potable Well Water Systems. Bell & Gossett ASME Expansion Tanks Series WTA Pre-Charged Tanks Technical Brochure Bell & Gossett Series WTA ASME...$8,655.00 -
116309 Bell & Gossett Series D-260 ASME Expansion Tank
Bell & Gossett
$7,787.00116309 Bell & Gossett Series D-260 ASME Expansion Tank. Tank Volume: 158.0 Gallons (600.0L). Series "D" (ASME) Pressurized Expansion Tanks Horizontal. "Not For Potable Water Systems". Bell & Gossett Expansion Tank Information: Bell &...$7,787.00 -
116307 Bell & Gossett Series D-200 ASME Expansion Tank
Bell & Gossett
$5,573.95116307 Bell & Gossett Series D-200 ASME Expansion Tank. Tank Volume: 110.0 Gallons (416.4L). Series "D" (ASME) Pressurized Expansion Tank. "Not For Potable Water Systems". Bell & Gossett Expansion Tank Information: Bell & Gossett...$5,573.95 -
116306 Bell & Gossett Series D-180 ASME Expansion Tank
Bell & Gossett
$5,410.95116306 Bell & Gossett Series D-180 ASME Expansion Tank. Tank Volume: 90.0 Gallons (340.7L). Series "D" (ASME) Pressurized Expansion Tank. "Not For Potable Water Systems". Bell & Gossett Expansion Tank Information: Bell & Gossett...$5,410.95 -
116304 Bell & Gossett Series D-120 ASME Expansion Tank
Bell & Gossett
$4,387.95116304 Bell & Gossett Series D-120 ASME Expansion Tank. Tank Volume: 68.0 Gallons (257.4L). Series "D" (ASME) Pressurized Expansion Tank. "Not For Potable Water Systems". Bell & Gossett Expansion Tank Information: Bell & Gossett...$4,387.95 -
113241 Bell & Gossett TPV-1-1/4FM Tank Purge Valve
Bell & Gossett
$154.95113241 Bell & Gossett TPV-1-1/4FM Tank Purge Valve. System Connection: 1-1/4" Female NPT - Tank Connection: 1-1/4" Male NPT. The Bell & Gossett Tank Purge Valve (TPV) is a combination full port ball type isolation valve and drain valve used to...$154.95 -
113240 Bell & Gossett TPV-1-1/4SM Tank Purge Valve
Bell & Gossett
$154.95113240 Bell & Gossett TPV-1-1/4SM Tank Purge Valve. System Connection: 1-1/4" Female SWT - Tank Connection: 1-1/4" Male NPT. The Bell & Gossett Tank Purge Valve (TPV) is a combination full port ball type isolation valve and drain valve used to...$154.95