Feature: 1. EFFICIENT AND ADJUSTABLE LEVEL: Circulation pump can effectively improve the working efficiency of the heating system. Support 3 level adjustment, 3 for the lowest, 1 for the highest 2. QUIET DESIGN: The water circulation pump has low noise during operation and will not affect family life. Save energy consumption and conform to the concept of green environmental protection 3. STRONG STABILITY: Hot water circulation pump support stable operation, high reliability, long term use not easy to malfunction, can be used for water heater 4. SAFE MATERIALS: 3 speed water circulating pump is made of copper, plastic, stainless steel, metal connecting parts, strong structure, not easy to rust, to ensure water safety 5. TECHNICAL PARAMETERS: Hot water pressure booster pump operating voltage is 1‑220V, the actual power is 70W, the maximum flow is 65L/min, the maximum head is 6 meters, the maximum working pressure is 10bar Specification: Item Type: Circulation Pump Material: Copper, plastic, stainless steel Thread Interface: Outer Diameter: Approx. 19mm / 0.75in, Inner Diameter: Approx. 17mm / 0.67in, 1/2in-14 UNC 60° Plug Type: US Plug Operating Voltage: 1-220V Actual Power: 70W Maximum Flow: 65L/min Maximum Head: Approx. 6meter / 19.7ft Adjustable Levels: 3 Levels adjustment, with 3 as the lowest and 1 as the highest Connect water pipe according to product instructions, do not run dry Maximum Working Pressure: 10bar Controller Bearing Temperature: -10℃ to +50℃ Pump Body Maximum Bearing Temperature: 110℃ Color: Red. Package List: 1 x Pump 2 x Extension Pipe 2 x Nut 2 x Washer 1 x PTFE Tape 1 x Wrench 1 x User Manual