Rinnai / Grundfos GTK03U — Circ-Logic™ External Pump Kit (115 V) w/ Union Connections Size_3/4" 120/208–240 VAC universal auto-sensing input

120/208–240 VAC universal auto-sensing input

This listing is for the 3208-WRFS sensor

Residential and light-commercial gas equipment installations

Site conditions affect radio performance

Rinnai / Grundfos GTK03U — Circ-Logic™ External Pump Kit (115 V) w/ Union Connections Size_3/4" 120/208–240 VAC universal auto-sensing inputRinnai Grundfos GTK03U Circ Logic External Recirculation Pump Kit Brand: Rinnai Grundfos SKU: GTK03U Product Overview The Rinnai Grundfos GTK03U is an external recirculation pump kit for compatible Rinnai tankless water heaters that support Circ Logic control. It adds a Grundfos circulator with an internal check valve to an approved recirculation layout, allowing the heater's Circ Logic settings to control scheduled or demand based circulation