Pros
- Simple installation under 1 hour for most users
- Extremely quiet with minimal noise
- Reliable hot water delivery in under 5 seconds
- Customizable timer saves energy
- Durable aluminum and stainless steel construction
Cons
- Cold water line may run warm initially until flushed
- Slight humming audible to sensitive ears through pipes
- Not compatible with tankless water heaters
The Watts Heat H2O Hot Water Recirculation System is designed for homeowners frustrated by long waits for hot water, especially in larger homes or those with distant fixtures from the water heater. It uses a pump at the heater and a thermostatically controlled sensor valve under the sink to create a pressure differential, bypassing cooled water into the cold line and maintaining hot water readiness throughout the house without needing a dedicated return line.
Standout features include thermal bypass technology for instant hot water in seconds, a programmable 24-hour timer for energy-efficient operation during peak times, and straightforward DIY installation with all necessary parts provided. Real-world performance shines in reviews, with users reporting hot water at far sinks in under 5 seconds, significant water savings, and quiet, reliable function even after months of use.
Build quality is solid, featuring a heavy-duty stainless steel pump head in an aluminum housing, 120V plug-in power, and 3.4 GPM flow rate in compact dimensions. It's maintenance-free post-install, though some note minor pipe humming or initial warm cold water as typical recirculation traits.
Drawbacks are few: sensitive users may hear faint operation sounds, and it's unsuitable for tankless heaters. Overall, this system delivers exceptional convenience and savings, earning high marks for ease and effectiveness. Ideal for tank-based setups seeking hassle-free hot water.
Power: 120 Volts, Corded Plug
Flow Rate: 3.4 Gallons Per Minute
Dimensions: 8.3"L x 7.8"W x 7.8"H
Weight: 3 Kilograms
Material: Aluminum, Stainless Steel
Included: Pump, sensor valve, 2 adapters, mounting screws, 2 supply lines
Warranty: 3 Years
Step 1: Mount pump on hot water outlet from heater using 3/4" connections and adapters.
Step 2: Install sensor valve under the farthest sink, connecting to hot and cold lines with supplied hoses.
Step 3: Plug in the 10 ft cord, set timer, and test. Use pipe dope on certain fittings; add valves for multiple loops if needed.
No soldering required for most; basic tools suffice. Professional help advised for complex plumbing.