Description
BackStop® 10-Gallon Thermal Expansion Tank (Model: 12-A110)
Product Overview
The BackStop® A Series (Non-ASME) thermal expansion tanks are fixed-diaphragm, pre-charged devices designed to protect potable water systems. They safely absorb expansion forces and control the excessive pressure generated inside water heaters.
By utilizing a sealed, compressible air cushion space to temporarily hold the expanded water volume, these tanks prevent the damaging effects of thermal expansion and system waterlogging. Water is entirely contained within a heavy-duty diaphragm paired with a polypropylene liner, preventing tank corrosion.
Technical Specifications
The following specifications apply strictly to Model 12-A110:
| Parameter | Specification |
| Model Number |
12-A110 |
| Total Tank Volume |
10 Gallons |
| Height |
20″ |
| Diameter |
11-1/2″ |
| System Connection |
3/4″ Stainless Steel |
| Product Weight |
13.5 lbs. |
Materials & Operating Limitations
Materials of Construction
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Shell: Carbon Steel
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System Connection: 304 Stainless Steel
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Tank Coating: Triple Layer Electrostatic Almond Paint
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Diaphragm: Heavy-Duty Butyl Rubber
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Liner Material: FDA-Grade Polypropylene
Operating Parameters
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Factory Pre-set Pressure: 35 PSI
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Maximum Design Pressure: 150 PSI
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Maximum Design Temperature: 200F
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Certifications: IAPMO Certified / UPC
Installation Guidelines
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Placement: The tank must be installed directly on the cold water line feeding the water heater.
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Location Selection: Choose an installation area where potential leakage will not cause property damage and where access to ideal water drainage is available.
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