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Bell & Gossett Tank Parts

Tank parts are replacement components used to maintain diaphragm expansion tanks and related hydronic system assemblies. These parts support repair and upkeep applications where proper pressure control, secure component fit, and dependable system integrity are important to preserving expansion tank performance and maintaining reliable long-term operation in heating and cooling systems.

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Bell & Gossett 12" Tank Gasket 3-299-8-00-928-12
Bell & Gossett
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Bell & Gossett 12" Tank Gasket 3-299-8-00-928-12
Sale price$141.95 Regular price$165.00
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Bell & Gossett
Bell & Gossett
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Bell & Gossett 1BN381LF, Wta 454 ASME Domestic Well Tank (317 Gal)
Sale price$28,291.95
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Bell & Gossett
Bell & Gossett
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Bell & Gossett 1BN360LF, PTA 449 ASME Potable Tank (106-106 Gal)
Sale price$10,164.95 Regular price$15,119.00
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Bell & Gossett
Bell & Gossett
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Bell & Gossett 1BN359LF, PTA 448 ASME Potable Tank (80-80 Gal)
Sale price$8,932.95 Regular price$13,287.00
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Bell & Gossett
Bell & Gossett
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Bell & Gossett 1BN358LF, PTA 447 ASME Potable Tank (53-53 Gal)
Sale price$7,623.95 Regular price$11,340.00
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Bell & Gossett
Bell & Gossett
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Bell & Gossett 1BN355LF, PTA 160 Volt ASME Potable Tank (70-47 Gal)
Sale price$5,687.95 Regular price$8,460.00
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Bell & Gossett
Bell & Gossett
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Bell & Gossett 1BN105LF, WT-405 Lead Free Water Tank
Sale price$3,656.95 Regular price$5,361.00
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Bell & Gossett
Bell & Gossett
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Bell & Gossett 116513, B85 Series B ASME Bladder Tank (23 GAL) with Sight Glass
Sale price$7,749.95
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Bell & Gossett
Bell & Gossett
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Bell & Gossett 116129, B400 Series B ASME Bladder Tank (106 GAL) 175 PSI
Sale price$20,922.95
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Bell & Gossett
Bell & Gossett
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Bell & Gossett Bladder 189592
Sale price$21,409.95 Regular price$25,795.00
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Bell & Gossett
Bell & Gossett
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Bell & Gossett Bladder 189593
Sale price$23,268.95 Regular price$28,034.00
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Bell & Gossett
Bell & Gossett
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Bell & Gossett Bladder 189591
Sale price$15,042.95 Regular price$18,123.00
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Bell & Gossett
Bell & Gossett
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Bell & Gossett Bladder 189596
Sale price$4,074.95 Regular price$4,909.00
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Bell & Gossett
Bell & Gossett
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Bell & Gossett Bladder 189586
Sale price$8,068.95 Regular price$9,721.00
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Bell & Gossett
Bell & Gossett
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Bell & Gossett Bladder 189579
Sale price$3,846.95 Regular price$4,634.00
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Bell & Gossett 8" Tank Gasket 3-299-8-00-928-08
Bell & Gossett
In stock (1 unit)
Bell & Gossett 8" Tank Gasket 3-299-8-00-928-08
Sale price$96.95
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Bell & Gossett 10" Tank Gasket 3-299-8-00-928-10
Bell & Gossett
In stock (1 unit)
Bell & Gossett 10" Tank Gasket 3-299-8-00-928-10
Sale price$123.95 Regular price$144.00
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Bell & Gossett 6" Tank Gasket 3-299-8-00-928-06
Bell & Gossett
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Bell & Gossett 6" Tank Gasket 3-299-8-00-928-06
Sale price$61.95 Regular price$72.00
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Bell & Gossett 4" Tank Gasket 3-299-8-00-928-04
Bell & Gossett
In stock (1 unit)
Bell & Gossett 4" Tank Gasket 3-299-8-00-928-04
Sale price$48.95 Regular price$56.00
In stock (1 unit)

From the Atoms & Bits Blog

Bell & Gossett Expansion Tanks: Models Overview

Bell & Gossett Expansion Tanks: Models Overview

Published: May 21, 2026 By: Lucas Gasparotto

Bell and Gossett expansion tanks help protect hydronic, plumbing, and well water systems from pressure problems caused by thermal expansion and pump cycling. This guide explains how B&G expansi...

Expansion Tanks vs. Buffer Tanks

Expansion Tanks vs. Buffer Tanks

Published: Feb 28, 2023 By: Laura Eck

An expansion tank allows for the expansion and contraction of a system when it heats up and cools off and provides head pressure for the circulation pump. A buffer tank adds volume to a heating or ...

Expansion Tank vs. Pressure Tank

Expansion Tanks vs. Pressure Tanks

Published: Jan 25, 2023 By: Laura Eck

Although very similar, pressure tanks and expansion tanks perform unique functions. Expansion tanks compensate for water expansion in closed-loop systems, while pressure tanks maintain the water pr...

Bladder Tanks vs. Diaphragm Tanks

Bladder Tanks vs. Diaphragm Tanks

Published: Nov 01, 2022 By: Laura Eck

Bladder expansion tanks contain a balloon-like bladder that can be replaced when required. On the other hand, a diaphragm expansion tank includes a flat diaphragm directly mounted to the tank.

Bell & Gossett Expansion Tanks

Under Pressure: Bell & Gossett Expansion Tanks

Published: Jul 11, 2022 By: Laura Eck

Bell & Gossett offers a wide selection of expansion tanks for proper system pressurization in hydronic heating and potable water (plumbing) systems.

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