Watts 0559129 Valve

The Watts 0559129 (Model 1/2 LF70A-F) is the direct lead-free replacement for the discontinued Watts 0215462. This high-capacity hot water extender tempering valve is designed for residential domestic water supply systems, specifically for installation at or near tankless heaters, solar water heaters, and storage tanks. Featuring a rugged lead-free brass body and 1/2 inch sweat connections, this valve uses a hydraulically-operated thermostat to precisely mix cold and hot water. This process extends the effective capacity of your water heater by allowing the tank to be kept at higher temperatures while delivering safe, tempered water at the outlet. The sweat connection design ensures a leak-free, permanent fit in high-production environments. For serviceability, the replaceable thermostat assembly can be removed as a single unit without disturbing the piping, and the fingertip dial adjustment cap allows for quick temperature calibration between 120°F and 160°F.

• Lead-Free Compliance: Fully compliant with the Safe Drinking Water Act (SDWA) for potable water applications, replacing older non-lead-free models like the 70A-1/2.
• Enhanced System Capacity: Maximizes water heater output by allowing for higher storage temperatures, effectively extending the gallon-per-hour rating of the system.
• Durable Construction: Built with a lead-free brass body and stainless steel springs to resist coronation and scaling in aggressive domestic hot water conditions.
• Field Serviceable: The internal thermostat assembly is easily accessible for maintenance or replacement, reducing long-term labor costs.
• High-Flow Performance: Maintains a 2 GPM minimum flow requirement while providing a 150 PSI maximum pressure rating for consistent performance across residential layouts.

Is the Watts 0559129 a direct replacement for the 70AF-1/2?
Yes, the 0559129 is the current LF70A-F model and serves as the updated version for the 0215462 and original 70AF-1/2. It matches the same 1/2" sweat footprint while upgrading the materials to meet lead-free standards.

Can this valve be used as an anti-scald device at the fixture?
No, Watts 70A series valves are hot water extender valves intended for installation at the heat source. They are not ASSE 1017 or 1070 listed for point-of-use anti-scald protection; for fixture-level tempering, use an ASSE 1070-certified mixing valve.

What is the temperature range for the LF70A-F?
This model features an adjustment range of 120°F to 160°F. If your application requires lower tempering (100°F to 130°F), you should specify the LFL70A-F (Watts 0559131) instead.

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.