Description
Bell & Gossett 1BN321LF – PT-42V Diaphragm Expansion Tank, 20 Gallon, Lead-Free, Potable Hot Water Use
Product Highlights
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Tank Volume: 20.0 Gallons
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Max Working Pressure: 100 PSI
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Max Operating Temperature: 200°F
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Factory Precharge: 38 PSI
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Construction: Non-ASME
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Application: Potable hot water systems
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Material Compliance: Lead-Free
Product Description
The Bell & Gossett PT-42V Expansion Tank (Model 1BN321LF) is a 20-gallon, lead-free diaphragm expansion tank specifically designed for use in potable hot water systems. It helps absorb thermal expansion in closed-loop domestic water heating systems, maintaining consistent pressure and protecting plumbing components from overpressure.
This model is factory precharged to 38 PSI and is suitable for use where ASME construction is not required. The lead-free design ensures safe operation in potable applications and complies with current low-lead requirements.
Key Features
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Ideal for closed potable hot water systems
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Diaphragm-type construction isolates water from air chamber to prevent waterlogging
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Factory precharged for easy installation
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Lead-free wetted surfaces ensure safe drinking water compatibility
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Durable steel tank with corrosion-resistant internal liner
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Compact vertical design for easy wall or floor mounting (mounting brackets not included)
Technical Specifications
| Specification | Details |
|---|---|
| Model Number | 1BN321LF |
| Tank Series | PT-42V |
| Tank Volume | 20.0 Gallons |
| Precharge Pressure | 38 PSI |
| Max Working Pressure | 100 PSI |
| Max Operating Temperature | 200°F |
| Construction | Non-ASME |
| Application | Potable Hot Water Systems |
| Lead-Free Compliant | Yes |
| Connection Size | 1" FNPT (verify if needed) |
| Orientation | Vertical |
| Material | Steel with Internal Diaphragm |
