Rinnai / Grundfos GTK03U — Circ-Logic™ External Pump Kit (115 V) w/ Union Connections 3-Way 26Watt high performance LEDs

26Watt high performance LEDs

Is this a reverse osmosis system

What is it made from

captive bonnet bolts

Rinnai / Grundfos GTK03U — Circ-Logic™ External Pump Kit (115 V) w/ Union Connections 3-Way 26Watt high performance LEDsRinnai 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