Expansion Tanks for Drinking Water
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These tanks meet NSF/ANSI Standard 61 for use with drinking (potable) water. Use them to accommodate the expansion of heated water and provide a cushion of compressed air in closed water-heating systems. All of these tanks have a diaphragm, which completely separates air and water. They prevent water loss by eliminating the need to expel hot water from systems during each heating cycle.
For technical drawings and 3-D models, click on a part number.
Tank End (E1) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Capacity, gal. | Dia. | Overall Lg. | Connection Pipe Size  | Pipe Connection Thread Type | Pipe Connection Gender | Wall Gauge, ga. | Max. Temp., °F | Max. Pressure, psi | Diaphragm Material | Specifications Met | Each | |
Beige-Painted Steel | ||||||||||||
| 2.1 | 8" | 11" | 3/4 | NPT | Male | 16 | 200° | 150 | Butyl Rubber | NSF/ANSI 61 | 000000 | 000000 |
| 4.5 | 10 1/2" | 13 1/2" | 3/4 | NPT | Male | 16 | 200° | 150 | Butyl Rubber | NSF/ANSI 61 | 000000 | 00000 |
| 8.5 | 12 1/2" | 19 3/16" | 3/4 | NPT | Male | 16 | 200° | 150 | Butyl Rubber | NSF/ANSI 61 | 000000 | 000000 |
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.
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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 |
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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 |
ASME-Code Expansion Tanks for Water
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Manufactured in accordance with ASME BPVC.VIII.1, these tanks 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.
For technical drawings and 3-D models, click on a part number.
Tank End Connection Pipe Size | Tank Side Connection Pipe Size | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Capacity, gal. | Dia. | Overall Lg. | Lg. (A) | Lg. (B) | Lg. (C) | (E1) | (E2) | (S1) | (S2) | Pipe Connection Thread Type | Pipe Connection Gender | Wall Gauge, ga. | Max. Temp., °F | Max. Pressure, psi | Expansion Tank Type | Each | |
Gray-Painted Steel | |||||||||||||||||
| 15 | 12" | 34 1/4" | 7" | 19" | 8" | 1/2 | 1/2 | 1 | 1 | NPT | Female | 13 | 450° | 150 | Bladderless | 00000000 | 0000000 |
| 30 | 14" | 49 9/16" | 8 3/8" | 31 1/4" | 10" | 1/2 | 1/2 | 1 1/2 | 1 1/2 | NPT | Female | 12 | 450° | 150 | Bladderless | 00000000 | 000000 |
| 40 | 14" | 64 5/8" | 8 3/8" | 46 1/4" | 10" | 1/2 | 1/2 | 1 1/2 | 1 1/2 | NPT | Female | 12 | 450° | 150 | Bladderless | 00000000 | 000000 |
| 80 | 20" | 66 1/8" | 10 3/4" | 42" | 16" | 1/2 | 1/2 | 2 | 2 | NPT | Female | 11 | 450° | 150 | Bladderless | 00000000 | 000000 |
Pressure-Rated Water Tanks
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These tanks can be used as water heaters when used with a heat source, such as an immersion heater. Also known as boiler tanks, they are designed to handle water pressure changes. Use them with hot or cold water. All are galvanized inside and outside for corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Tank End Connection Pipe Size | Tank Side Connection Pipe Size | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Capacity, gal. | Dia. | Overall Lg. | Lg. (A) | Lg. (B) | Lg. (C) | Lg. (D) | (E1) | (E2) | (S1) | (S2) | (S3) | (S4) | (S5) | Pipe Connection Thread Type | Pipe Connection Gender | Wall Gauge, ga. | Max. Temp., °F | Max. Pressure, psi | Each | |
Galvanized Steel | ||||||||||||||||||||
| 15 | 12" | 30" | 18" | 6" | 8" | 6" | 1 | 1 | 1 | 1 | 1 | 1 1/4 | 1/2 | NPT | Female | 14 | 450° | 75 | 0000000 | 0000000 |
| 30 | 12" | 60" | 18" | 6" | 8" | 6" | 1 | 1 | 1 | 1 | 1 | 1 1/4 | 1/2 | NPT | Female | 14 | 450° | 75 | 0000000 | 000000 |
| 40 | 14" | 60" | 18" | 6" | 8" | 6" | 1 | 1 | 1 | 1 | 1 | 1 1/4 | 1/2 | NPT | Female | 14 | 450° | 75 | 0000000 | 000000 |
| 82 | 20" | 60" | 18" | 6" | 8" | 6" | 1 | 1 | 1 | 1 | 1 | 1 1/4 | 1/2 | NPT | Female | 14 | 450° | 75 | 0000000 | 000000 |