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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AX-200V Armstrong Pre-charged ASME Expansion Tank 572005-106
Armstrong
$4,928.00AX-200V Armstrong Pre-charged ASME Expansion Tank 572005-106. Tank Volume 115.0 gal, (93.0 L). *Please note image is generic. Armstrong Series AX & AX-V Diaphragm Tanks are designed to reduce tank sizes by up to 80% over standard designs...$4,928.00 -
PAX30-125 Taco Expansion Tank Bladder Only 600-2065RP
Taco
$2,857.95600-2065RP Taco PAX30-125 Expansion Tank Bladder Only. 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...$2,857.95 -
CA450-175P Taco CA Bladder Expansion Tank
Taco
$6,457.00CA450-175P Taco CA Bladder Expansion Tank. Tank Volume: 119 Gal. 450 Liter. Standard Design Pressure and Temperature: 175 psi @ 240*F Max. Suitable for Vertical or Horizontal Installation. Information: Taco Series CA Expansion Tank...$6,457.00 -
189582 Bell & Gossett Series B-500 ASME Expansion Tank Bladder Only
Bell & Gossett
$5,128.95189582 Bell & Gossett Series B-500 ASME Expansion Tank Bladder Only. Tank And Acceptance Volume Gallons: 132 Gallons (500) liters. Bell & Gossett Pre-charged Bladder & Diaphragm Tanks ASME (B,D,B-LA). Please Contact Us For Lead Time &...$5,128.95 -
116074 Bell & Gossett B-600SG Series B ASME Bladder Tank W/CA Sight Glass
Bell & Gossett
$10,046.00116074 Bell & Gossett B-600SG Series B ASME Bladder Tank W/CA Sight Glass. Tank And Acceptance Volume Gallons: 158 Gallons (600) liters. *Please note image is generic. Bell & Gossett Expansion Tank Information: Bell & Gossett Series...$10,046.00 -
CA1000-125 Taco CA Expansion Tank Replacement Bladder Only 600-022RP
Taco
$12,771.00CA1000-125 Taco CA Expansion Tank Replacement Bladder Only 600-022RP. Tank Volume: 264 Gal. 1000 Liter. Standard Design Pressure and Temperature: 125 psi @ 280*F Max. Suitable for Vertical or Horizontal Installation. Information: Taco Series CA...$12,771.00 -
CA1000-125 Taco CA Expansion Tank 264 Gallon
Taco
$14,955.50CA1000-125 Taco CA Expansion Tank 264 Gallon. Tank Volume: 264 Gal. 1000 Liter. Standard Design Pressure and Temperature: 125 psi @ 280*F Max. Suitable for Vertical or Horizontal Installation. Information: Taco Series CA Expansion Tank...$14,955.50 -
573006-008 Armstrong A1000-L Replacement Bladder Only
Armstrong
$9,318.95573006-008 Armstrong A1000-L Replacement Bladder Only. Armstrong A1000-L Expansion Tank. Tank Volume Gal/L: 264(999). Armstrong Series L Bladder Expansion Tanks. Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80% over...$9,318.95 -
573000-008 Armstrong A200-L Replacement Bladder Only
Armstrong
$4,157.60573000-008 Armstrong A200-L Replacement Bladder Only. Armstrong A200-L Expansion Tank. Tank Volume Gal/L: 53(200). Armstrong Series L Bladder Expansion Tanks. Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80% over...$4,157.60 -
572006-308 Armstrong AST-210 ASME Pre-Pressurized Expansion Tank
Armstrong
$4,517.90572006-308 Armstrong AST-210 ASME Pre-Pressurized Hydro-Pneumatic Expansion Tank. Volume Acceptance USGal (52.5) / Tank (90.0). Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80% over standard designs. Expansion tanks use...$4,517.90 -
572006-307 Armstrong AST-180 ASME Pre-Pressurized Expansion Tank
Armstrong
$4,255.20572006-307 Armstrong AST-180 ASME Pre-Pressurized Hydro-Pneumatic Expansion Tank. Volume Acceptance USGal (52.5) / Tank (80.0). Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80% over standard designs. Expansion tanks use...$4,255.20 -
572006-312 Armstrong AST-160 ASME Pre-Pressurized Expansion Tank
Armstrong
$3,979.40572006-312 Armstrong AST-160 ASME Pre-Pressurized Hydro-Pneumatic Expansion Tank. Volume Acceptance USGal (52.5) / Tank (70.0). Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80% over standard designs. Expansion tanks use...$3,979.40 -
572006-310 Armstrong AST-100 ASME Pre-Pressurized Expansion Tank
Armstrong
$2,996.50572006-310 Armstrong AST-100 ASME Pre-Pressurized Hydro-Pneumatic Expansion Tank. Volume Acceptance USGal (21.0) / Tank (45.0). Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80% over standard designs. Expansion tanks use...$2,996.50 -
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 -
1BN163LF Bell & Gossett WTA-454 ASME Domestic Well Tank
Bell & Gossett
$16,965.951BN163LF Bell & Gossett WTA-454 ASME Domestic Well Tank. Tank Volume Gallons: 317 (206.1L). For Potable Well Water Systems. "WTA" Well Water Tanks (ASME Construction) Designed for Potable Well Water and Booster Pump Systems. Bell & Gossett...$16,965.95 -
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 -
189590 Bell & Gossett Series B-2500 ASME Expansion Tank Bladder Only
Bell & Gossett
$21,861.00189590 Bell & Gossett Series B-2500 Expansion Tank Bladder Only for 116793 Bell & Gossett Series B-2500 ASME Pressurized Expansion Tank, Vertical. Tank And Acceptance Volume Gallons: 528 Gallons (2000) liters. Bell & Gossett Expansion...$21,861.00 -
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