15-55-HWR-D-COMFORT Grundfos ALPHA Wireless Push Button Activated Recirculation System (99793173) The ALPHA 15-55 HWR-D is a wireless push button activated recirculation system that provides comfort in homes with no need for a return line or electricity under the sink. System includes line cord, two (2) activation push buttons, four (4) thermal bypass valves, four (4) hose kits, and one (1) set of 3/4" bronze union isolation valves fittings. SHARE DOWNLOAD ADD TO COMPAREPRINT Head max : 18.05 ft TF class : 110 Approvals on nameplate : ETL, FCC, NSF Pump housing : Stainless steel Pumped liquid : Water Liquid temperature range : 35.6 .. 230 °F Selected liquid temperature : 140 °F Density : 61.35 lb/ft³ Power input - P1 : 2 .. 45 W Main frequency : 60 Hz Rated voltage : 1 x 115 V Maximum current consumption : 0.02 .. 0.65 A Enclosure class (IEC 34-5) : IP42 Range of ambient temperature : 33.8 .. 104 °F Maximum operating pressure : 145.04 psi Pipe connection : 1 1/4 Pressure stage : PN 10 Port-to-port length : 5 15/16 in