Watts 0067371 Expansion Tank

For professional contractors managing thermal expansion in closed potable water systems, the Watts 0067371 (model PLT-12) is the industry-standard solution for maintaining system equilibrium. This 4.5-gallon tank is engineered to absorb the increased water volume generated by direct-fired water heaters—gas, oil, or electric—preventing the dangerous pressure spikes that trigger T&P relief valves. As the direct updated replacement for the 0067701, DET-12, DET-12-M1, and previous PLT-12 iterations, it ensures seamless compatibility for retrofit or new residential expansion tank installations.

The unit features a rugged butyl diaphragm and an FDA-approved polypropylene liner, creating a dedicated potable water expansion chamber that prevents water-to-metal contact for superior corrosion resistance. Rated for a maximum pressure of 150 PSI and temperatures up to 200°F, this thermal expansion tank comes with a factory pre-charge of 20 PSI, which is field-adjustable to match the site's static supply pressure. The 3/4-inch MNPT stainless steel connection provides a robust, lead-free interface for high-performance plumbing stacks.

• Direct Replacement Compatibility: Specifically designed to replace obsolete 0067701, DET-12, and DET-12-M1 models with no piping reconfiguration required.
• High-Temperature Durability: Rated for 200°F maximum temperature, making it ideal for high-recovery residential water heaters.
• Corrosion-Resistant Design: Features an FDA-approved polypropylene liner and a stainless steel inlet to prevent internal tank degradation.
• Field-Adjustable Pre-charge: Standard Schrader valve allows for precise air-side adjustment (up to 80 PSI) to match system supply pressure.
• Code Compliance: Certified to ANSI/NSF 61 and IAPMO listed, satisfying local plumbing codes for potable water safety.

Can the Watts PLT-12 be installed horizontally?
Yes, this model is approved for both in-line vertical and horizontal mounting, provided the piping is adequately supported to handle the weight of a full tank.

What is the correct pre-charge setting for this tank?
The tank pre-charge must be adjusted to match the incoming city water pressure before installation. Failure to equalize these pressures significantly reduces the tank's 3.42-gallon acceptance volume.

Is this tank suitable for hydronic heating systems?
No, the PLT-12 is specifically for potable water expansion applications. For non-potable hydronic or closed-loop heating systems, a standard ETX series tank should be used.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.