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DFARS Compliance
Tank Side Connection Pipe Size
Tank End Connection Pipe Size
Expansion Tanks for Water
Use these tanks to accommodate the expansion of heated water and provide a cushion of compressed air in closed water-heating systems. They prevent water loss by eliminating the need to expel hot water from systems during each heating cycle.
Galvanized steel tanks are hot-dipped for maximum corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Gray-Painted Steel
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Tank Side Connection Pipe Size | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Capacity, gal. | Dia. | Overall Lg. | Lg. (A) | Lg. (B) | Tank End Connection Pipe Size (E1)  | (S1) | (S2) | Pipe Connection Thread Type | Pipe Connection Gender | Wall Gauge, ga. | Max. Temp., °F | Max. Pressure, psi | Expansion Tank Type | Each | |
| 8 | 9" | 32" | 5" | 11" | 3/4 | 1/2 | 1/2 | NPT | Female | 14 | 450° | 75 | Bladderless | 000000 | 0000000 |
| 15 | 12" | 30" | 4" | 11" | __ | 1/2 | 1/2 | NPT | Female | 14 | 450° | 75 | Bladderless | 000000 | 000000 |
| 18 | 12" | 36" | 4" | 14" | __ | 1/2 | 1/2 | NPT | Female | 14 | 450° | 75 | Bladderless | 000000 | 000000 |
Galvanized Steel
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Tank End Connection Pipe Size | Tank Side Connection Pipe Size | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Capacity, gal. | Dia. | Overall Lg. | Lg. (A) | Lg. (B) | Lg. (C) | (E1) | (E2) | (E3) | (S1) | (S2) | (S3) | Pipe Connection Thread Type | Pipe Connection Gender | Wall Gauge, ga. | Max. Temp., °F | Max. Pressure, psi | Expansion Tank Type | Each | |
| 8 | 12" | 19" | 4" | 4" | 8 13/16" | 1/2 | 1/2 | 2 | 1 1/4 | 1/2 | 1/2 | NPT | Female | 14 | 450° | 75 | Bladderless | 0000000 | 0000000 |
| 15 | 12" | 33" | 4" | 11" | 8 13/16" | 1/2 | 1/2 | 2 | 1 1/4 | 1/2 | 1/2 | NPT | Female | 14 | 450° | 75 | Bladderless | 0000000 | 000000 |
| 40 | 14" | 63" | 4" | 26" | 8 13/16" | 1/2 | 1/2 | 2 | 1 1/4 | 1/2 | 1/2 | NPT | Female | 14 | 450° | 75 | Bladderless | 0000000 | 000000 |