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(More customer reviews)My plumber installed a Grundfos comfort system ( pipe and valve) for a guest bath, meaning I had hoped to use the timer on the pump and not have the pump on 24hours a day 7 days a week, but rather on only when I had guests and other wise the pump would be would be off. Turns out my situation is not a good fit for this system's characteristics. Using it the way I hoped to I have ALOT of hot water in the cold supply when the pump is off. When the warm supply is cool to cold the Comfort Valve is Wide open (ie a gallon or so a minute flow) and puts way too much hot water in the cold water supply, for the faucet where it is installed and critically other nearby faucets, which suffer from back flow as well . So now rather than wait for the hot water supply to deliver warm water .We have to wait for the cold water supply to supply cold on nearby faucets. The product reference material from GRUNDFOS doesn't point this out, if it had I would have done something different. My Plumber and I both spoke to Grunfos tech support on this one. THUMBS DOWN to Grundfos for not identifying situations where this system is not a fit.
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Grundfos UP15-10SU7P/TLC Comfort Series 1/25 HP Recirculator Pump (595916)The Grundfos UP15-10SU7P/TLC Comfort Series 1/25 HP Recirculator Pump is a Comfort Series Instant Hot Water System. Includes timer and line cord. Grundfos Pumps is proud to bring the comfort and savings of hot water recirculation to the existing homes market with the Comfort Series Instant Hot Water System. The Comfort System includes a Grundfos UP15-10SU7/TLC circulator and the revolutionary Comfort Valve. The stainless steel circulator, complete with timer and 10-foot power cord, is installed directly to the hot water discharge on the water heater. The Comfort Valve is installed under the sink at the fixture furthest from the water heater, and the system uses the existing cold water line to return hot water to the water heater. The Grundfos circulator pumps, Series UP, are specifically designed for heating systems. The pumps are also suitable for circulation of hot domestic water and for circulation of liquid in cooling and air-conditioning systems.SPECIFICATIONS - Grundfos UP15-10SU7P/TLC Comfort Series 1/25 HP Recirculator Pump:; Flow range: 0 - 6.5 U.S. GPM; Head range: 0 - 6 FEET; Motors: Single Phase, 115 Volts; Maximum fluid temperature: 150;F (66;C); Minimum fluid temperature: 36;F (2;C); Maximum working pressure: 145 PSI; Connection: 3/4-inch M X 3/4-inch FNPT; TLC = Timer, Line CordCONSTRUCTION - Grundfos UP15-10SU7P/TLC Comfort Series 1/25 HP Recirculator Pump:; Stator Housing - Aluminum; Spherical Seperator - Stainless Steel; Rotor Can Complete - Stainless Steel/Tungsten Carbide; Rotor, Impeller - Stainless Steel, EPDM, PRO, PFTE, Graphite; Pump Housing - Brass MS 58; Isolation valve - PPO; Stainless Steel; Terminal Box Cover, Motor Cover- Pa66/6; Light - Lexan; Cable, Cable Relief - PVC; Insulating Cover - EPP 55; Orings - EPDM; Check Valve - POMMOTOR - Grundfos UP15-10SU7P/TLC Comfort Series 1/25 HP Recirculator Pump:; Insulation class: F; Power consumption: 25W; Volt
