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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113230 Bell & Gossett TPV-3/4SF Tank Purge Valve
Bell & Gossett
$94.50113230 Bell & Gossett TPV-3/4SF Tank Purge Valve. System Connection: 3/4" Female SWT - Tank Connection: 3/4" Female NPT. The Bell & Gossett Tank Purge Valve (TPV) is a combination full port ball type isolation valve and drain valve used to...$94.50 -
1BN332LF Bell & Gossett HFT-60V 3Expansion Tank
Bell & Gossett
$454.951BN332LF Bell & Gossett HFT-60V 3Expansion Tank. Information: 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...$454.95 -
1BN331 Bell & Gossett HFT-40V Expansion Tank
Bell & Gossett
$294.951BN331 Bell & Gossett HFT-40V 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...$294.95 -
22010300 Wessels Series NLA-300 Expansion Tank
Wessels
$3,861.9522010300 Wessels Series NLA-300 Expansion Tank. 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 properly...$3,861.95 -
85-L Armstrong Expansion Tank 572006-198
Armstrong
$2,871.9585-L Armstrong Expansion Tank 572006-198. Armstrong 85-L Expansion Tank. Tank Volume Gal/L: 23 (87). Armstrong Series L Bladder Expansion Tanks. Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80% over standard designs...$2,871.95 -
2210400 Wessels Series FXA-400-WG Expansion Tank Bladder Only
Wessels
$2,361.952210400 Wessels Series FXA-400-WG Expansion Tank Bladder Only. Information: Wessels Series FXA Brochure Wessels patented FXA Tanks are ASME replaceable bladder type pre-charged hydro-pneumatic tanks for commercial and industrial well and...$2,361.95 -
14NA63 Wessels Series NA Hydronic Expansion Tank 23014063
Wessels
$971.9514NA63 Wessels Series NA Hydronic Expansion Tank 23014063, 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...$971.95 -
116481 Bell & Gossett B130 ASME Bladder Expansion Tank
Bell & Gossett
$4,118.00116481 Bell & Gossett B130 ASME Bladder Expansion Tank. Tank And Acceptance Volume Gallons: 34 Gallons (130) liters. Bell & Gossett Expansion Tank Information: Bell & Gossett Series B ASME Expansion Tank Brochure Bell & Gossett...$4,118.00 -
116477 Bell & Gossett B35 ASME Bladder Expansion Tank
Bell & Gossett
$2,893.95116477 Bell & Gossett B35 ASME Bladder Expansion Tank. Tank And Acceptance Volume: 10 Gallons (38) liters. Bell & Gossett Expansion Tank Information: Bell & Gossett Series B ASME Expansion Tank Brochure Bell & Gossett Series D...$2,893.95 -
116053 Bell & Gossett Series B-400 ASME Pressurized Expansion Tank
Bell & Gossett
$6,584.00116053 Bell & Gossett B-400 ASME Pressurized Expansion Tank. Tank And Acceptance Volume Gallons: 106 Gallons (400) liters. Repair Parts: 189580 Bell & Gossett B-400 Expansion Tank Replacement Bladder Only Information: Bell &...$6,584.00 -
PTA-100V Bell & Gossett 1BN353LF ASME Potable Expansion Tank
Bell & Gossett
$4,297.95PTA-100V Bell & Gossett 1BN353LF 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...$4,297.95 -
AX-144V Armstrong Pre-charged ASME Expansion Tank
Armstrong
$4,157.00AX-144V Armstrong Pre-charged ASME Expansion Tank . Tank Volume 80.0 gal, (65.0 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...$4,157.00 -
116479 Bell & Gossett B85 ASME Bladder Expansion Tank
Bell & Gossett
$3,132.00116479 Bell & Gossett B85 ASME Bladder Expansion Tank. Tank And Acceptance Volume Gallons: 23 Gallons (85) liters. Bell & Gossett Expansion Tank Information: Bell & Gossett Series B ASME Expansion Tank Brochure Bell & Gossett Series...$3,132.00 -
A400-L Armstrong Expansion Tank Bladder Only 573002-008
Armstrong
$4,857.95A400-L Armstrong Expansion Tank Bladder Only 573002-008. Tank Volume Gal/L: 106(400). 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...$4,857.95 -
116315 Bell & Gossett Series D80SG ASME Expansion Tank
Bell & Gossett
$3,859.95116315 Bell & Gossett Series D80SG ASME Expansion Tank with sight glass. Tank Volume: 44.4 Gallons (168.1L). Series "D" (ASME) Pressurized Expansion Tanks Vertical. "Not For Potable Water Systems". Bell & Gossett Expansion Tank...$3,859.95 -
JPSG63010 John Wood Sight Glass Assembly
Bell & Gossett
$164.00JPSG63010 John Wood Sight Glass Assembly. This Item Usually Ships The Same Day!$164.00 -
600-2075RP Taco PAX500-150 Expansion Tank Bladder Only
Taco
$4,548.95600-2075RP Taco PAX500-150 Expansion Tank Bladder Only. Tank Volume: 132 Gal. 500 Liter. Standard Design Pressure and Temperature: 125 psi @ 280*F Max. Suitable for Vertical or Horizontal Installation. Information: Taco Series CA Expansion Tank...$4,548.95 -
570139-000 Armstrong AET 12x33 Expansion Tank
Armstrong
$748.95570139-000 Armstrong AET 12x33 Expansion Tank. Tank Volume 15.0 gal, (57L). *Please note image is generic. Armstrong Series AET Plain Steel Expansion Tanks. Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80% over standard...$748.95 -
BB-119-3W Boiler Buddy Buffer Tank 119 Gal W/3 Aquastat Wells
Boiler Buddy
$3,678.95BB-119-3W Boiler Buddy Buffer Tank 119 Gal W/3 Aquastat Wells. 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...$3,678.95 -
572018-010 Armstrong Diaphragm Expansion Tank SX-160V
Armstrong
$2,142.95572018-010 Armstrong Diaphragm Expansion Tank SX-160V. Tank Volume 79.4 gal, (301L). *Please note image is generic. Information: Armstrong NON-ASME Diaphragm Expansion Tank Submittal Sheet Armstrong Series SX Diaphragm Expansion Tank Installation...$2,142.95 -
189583 Bell & Gossett Series B-600 ASME Expansion Tank Bladder Only
Bell & Gossett
$4,652.95189583 Bell & Gossett Series B-600 ASME Expansion Tank Bladder Only. Tank And Acceptance Volume Gallons: 158 Gallons (600) liters. Bell & Gossett Pre-charged Bladder & Diaphragm Tanks ASME (B,D,B-LA). Please Contact Us For Lead Time &...$4,652.95 -
PAX300-150 Taco Bladder Expansion Tank
Taco
$6,127.00PAX300-150 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...$6,127.00 -
PAX215-150P Taco Bladder Expansion Tank NSF Rated
Taco
$2,984.20PAX215-150P Taco Bladder Expansion Tank NSF Rated. Tank Volume: 57 gal, 216 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...$2,984.20 -
35-L Armstrong Expansion Tank 572006-196
Armstrong
$2,459.9535-L Armstrong Expansion Tank 572006-196. Armstrong 35-L Expansion Tank. Tank Volume Gal/L: 10(38). Armstrong Series L Bladder Expansion Tanks. Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80% over standard designs...$2,459.95 -
573001-008 Armstrong A300-L Expansion Tank Replacement Bladder
Armstrong
$3,452.95573001-008 Armstrong A300-L Expansion Tank Replacement Bladder Only. Tank Volume Gal/L: 80(300). Armstrong Series L Bladder Expansion Tanks. Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80% over standard designs. Expansion tanks...$3,452.95 -
116071 Bell & Gossett B-300SG ASME Bladder Tank w/ CA SIGHT Glass 80 GAL
Bell & Gossett
$5,451.00116071 Bell & Gossett B-300SG ASME Bladder Tank w/ CA SIGHT Glass 80 GAL. Tank And Acceptance Volume Gallons: 80 Gallons (300) liters. Bell & Gossett Expansion Tank Information: Bell & Gossett Series B ASME Expansion Tank Brochure Bell...$5,451.00 -
CA800-150 Taco CA Expansion Tank 211 Gallon
Taco
$9,387.00CA800-150 Taco CA Expansion Tank 211 Gallon. Tank Volume: 211 Gal. 800 Liter. Standard Design Pressure and Temperature: 125 psi @ 240*F Max. Suitable for Vertical or Horizontal Installation. Information: Taco Series CA Expansion Tank...$9,387.00 -
CA300-125 Taco CA Expansion Tank Bladder Only
Taco
$5,347.95CA300-125 Taco CA Expansion Tank Bladder Only. The box the bladder comes in = 26 x 26 x 10 and weighs approximately 20 lbs. Tank Volume: 79 Gal. 300 Liter. Standard Design Pressure and Temperature: 125 psi @ 240*F Max. Suitable for Vertical or...$5,347.95 -
572006-311 Armstrong AST-125 ASME Pre-Pressurized Expansion Tank
Armstrong
$3,326.95572006-311 Armstrong AST-125 ASME Pre-Pressurized Hydro-Pneumatic Expansion Tank. Volume Acceptance USGal (21.0) / Tank (60.0). Armstrong Expansion Tanks are designed to reduce tank sizes by up to 80% over standard designs. Expansion tanks use...$3,326.95 -
CA450-125 Taco CA Expansion Tank Replacement Bladder Only
Taco
$5,071.40CA450-125 Taco CA Expansion Tank Replacement Bladder Only. Tank Volume: 119 Gal. 450 Liter. Standard Design Pressure and Temperature: 125 psi @ 240*F Max. Suitable for Vertical or Horizontal Installation. Information: Taco Series CA Expansion Tank...$5,071.40 -
189584 Bell & Gossett Series B-800 ASME Expansion Tank Bladder Only
Bell & Gossett
$6,682.95189584 Bell & Gossett Series B-800 ASME Expansion Tank Bladder Only. Tank And Acceptance Volume Gallons: 211 Gallons (800) liters. Bell & Gossett Pre-charged Bladder & Diaphragm Tanks ASME (B,D,B-LA). Please Contact Us For Lead Time &...$6,682.95 -
PS040-125 Taco PS Expansion Tank 40 Gal
Taco
$2,158.95PS040-125 Taco PS Expansion Tank 40 Gal. Capacity (Gal) 40. 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...$2,158.95 -
CX215-125 Taco 57 Gal Diaphragm Expansion Tank
Taco
$3,458.95CX215-125 Taco 57 Gal Diaphragm Expansion Tank. Tank Volume: 57 Gal, 215 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...$3,458.95 -
CX350-125 Taco 92 Gal Diaphragm Expansion Tank
Taco
$5,237.95CX350-125 Taco 92 Gal Diaphragm Expansion Tank. Tank Volume: 92 Gal, 350 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...$5,237.95 -
CBX600-125 Taco CBX Vertical Bladder Expansion Tank 160 Gal
Taco
$9,870.55CBX600-125 Taco CBX Vertical Bladder Expansion Tank 160 Gal. Tank Volume, Gal: 160, Liter: 600. *Vertical Installation Only. Taco CBX Expansion Tanks are bladder type tanks that provide permanent separation of air and water. Designed for...$9,870.55 -
CBX350-125 Taco CBX Vertical Bladder Expansion Tank 92 Gal
Taco
$5,768.95CBX350-125 Taco CBX Vertical Bladder Expansion Tank 92 Gal. Tank Volume, Gal: 92, Liter: 350. *Vertical Installation Only. Taco CBX Expansion Tanks are bladder type tanks that provide permanent separation of air and water. Designed for...$5,768.95 -
PAX254-150 Taco Bladder Expansion Tank
Taco
$4,428.95PAX254-150 Taco Bladder Expansion Tank. Tank Volume: 67 gal, 254 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...$4,428.95 -
PAX215-150 Taco Bladder Expansion Tank
Taco
$4,546.95PAX215-150 Taco Bladder Expansion Tank. Tank Volume: 57 gal, 216 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...$4,546.95 -
1BN101LF Bell & Gossett WT-401 Well Tank
Bell & Gossett
$1,547.951BN101LF Bell & Gossett WT-401 Well Tank. The Series WT expansion tank will help protect the pump and pressure switches against short cycling. The Potable well tank delivers adequate water under pressure between pump cycles to meet the required...$1,547.95 -
1BN378LF Bell & Gossett WTA-451 ASME Domestic Well Tank
Bell & Gossett
$10,788.001BN378LF Bell & Gossett WTA-451 ASME Domestic Well Tank. Tank Volume Gallons: 158 (600L). For Potable Well Water Systems. Bell & Gossett ASME Expansion Tanks Series WTA Pre-Charged Tanks Technical Brochure Bell & Gossett Series WTA ASME...$10,788.00