This is a domestic hot water recirculation pump designed for residential use to provide instant hot water at faucets and showers, reducing wait times and water waste. It uses a comfort valve (bypass/sensor valve, NOT INCLUDED) that allows recirculation through the cold water line in homes without a dedicated return line—common in older plumbing setups.Key Features and Specs
Type: Hot water recirculating circulator pump system (not a standard heating circulator like Grundfos UPS/ALPHA series).
Operation: Includes a built-in programmable 24-hour timer (with 15-minute increments, ON/OFF override modes) to run only during high-use periods (e.g., mornings/evenings) for energy savings.
Power: 115-120V AC, 60Hz; low energy use (comparable to or less than a 25W bulb when running).
Performance (based on equivalent Grundfos COMFORT systems and similar Watts models):
Max flow: Around 6-9 US GPM.
Max head: Around 5-6 feet.
Max operating temperature: Up to 150°F (60°C); not compatible with tankless water heaters.
Installation: Plug-and-play for retrofit; includes pump, timer; indoor use only; no dedicated return line needed.
Benefits: Saves water (up to thousands of gallons/year), quiet/maintenance-free, thermal bypass technology.
Common Notes from Users/Reviews
It's reliable for many, but some report failures after 1-2 years (e.g., pump stopping or timer issues).
Often compared or identical in function to Grundfos COMFORT Pump or model 595916.
For programming the timer: Unplug first, set current time on the 24-hour dial, push tabs out for "ON" periods, plug back in.
It's manufactured by Grundfos for Watts, labeled as "Watts/Grundfos".