WI-HP-SECURE-1.5 Water Inc HousePure Secure Tankless Water Heater Filter System LEVEL 1 Tankless Water Heater Scale Prevention. Provides annual protection against costly water heater scaling and sediment build-up. Siliphos® Polyphosphate Media prevents water hardness from scaling on flash heating surfaces. A 5-micron filter reduces sediment, which can cause additional scaling throughout the hot water line. The unique micro-fiber filter construction delivers higher filtration efficiency and flow rates. Ideal for indoor and outdoor installations. Features a 3/4” NPT inlet/outlet with a differential filter change gauge for peace-of-mind.Installation Flexibility of RIGHT or LEFT water inlet: Specify R or LFilter Capacity: One year or when gauge indicates change neededMax Flow Rate: 7 gallons/minuteDimensions: Width: 5.25” Height: 25.75” Depth: 5.5”Includes mounting bracket and filter change spanner wrenchWater, Inc electronic filter change monitor includedTemperature Range: 40ºF to 100ºFTools Required: Teflon® tape, adjustable wrench, tube cutter, suitable pipe fittings and inlet gate valveComponent Tested to NSF/ANSI Standard 42 for material requirements.