Feature 1、Specially designed for hot and cold bathtubs, with excellent performance and complete functions. 2、Thermostat water heater, perfectly suitable for massage bathtubs, hot tubs, SPA pools. 3、Widely used in the circulation system of a pressurized hot tub to maintain and heat the water temperature. 4、Cold water can also be heated, mainly for heating and constant temperature functions. 5、It does not require any special maintenance or programming, and is easy to install and operate. Item Type: Thermostat Water Heater Material: Stainless Steel Model: H10-R1 Product Power: 1KW Working Voltage: AC220-240V Waterproof Rating: IPX5 Current: 4.5A Applicable Bathtub Water Capacity: 220L Purpose: Constant Temperature Heating Heater Type: Water Heater Applicable Places: Massage Bathtub, SPA Bathtub Weight: Approx. 1550g / 54.7oz Product Size: Approx. 27x13.5x5.5cm / 10.6x5.3x2.2in Fitting Pipe Joint No. 1 Size: Thickness: Approx. 4mm / 0.16in Height: Approx. 4.4cm / 1.7in Outside Diameter without Thread: Approx. 5.7cm / 2.2in Fitting Pipe Joint No. 2 Size: Thickness: Approx. 3mm / 0.12in Height: Approx. 4.4cm / 1.7in Outside Diameter without Thread: Approx. 5.7cm / 2.2in Installation: The bathtub water heater should be connected to the tubing circulation system pipeline, and can also be connected to the inlet and outlet of the bathtub pump to ensure that the water flow direction complies with the instructions on the bathtub water heater; 1. The heater must be installed horizontally. 2. The heater can be installed with the inlet or outlet of the bathtub pump. (Note: Cannot be fixed by binding) 3. PVC pipe: cut a specific length of polyethylene from the pump outlet and connect to the nozzle. (Note: The size of the pipe joint should be the same as that of the bathtub pipe) 4. Pipe joints: clean the PVC pipe joints, and then use glue to connect the PVC pipe and joints together. (Note: installation distance between heater and pump) 5. Heater installation: Separate the connecting nut and connect the PVC pipe to the heater (Note: O-ring). Make sure the connection is tight enough. (Note: The connecting nut is made of plastic material, too much force will cause damage). 6. Connect the knob to the thermostat heater at the threaded diameter of the fitting, and then apply glue to the inside of the fitting connector without thread, and then insert the pipe that needs to be connected (in addition, the outer wall of the pipe is also coated with glue, so that it is more firm); 7. After the bathtub heater is installed, it must be checked: If the pipe or connection is leaking: Pour water into the bathtub and run the pump for 30 minutes to ensure that the circulating water system, no leakage. If the heater does not start, try to find the problem among the most common faults provided and their possible solutions. Package List 1 x Water Heater Thermostat 1 x English Manual 2 x No. 1 Fitting Pipe Joint 2 x No. 2 Fitting Pipe Joint 2 x Joint Black Gasket Note 1. Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 3. To avoid damage caused by inadvertently resetting the thermal circuit breaker, no external switching devices (such as timers) should be used to supply power, nor should they be connected to circuits regularly switched on and off by utilities. 4. 2 gaskets are commonly used for 4 joints. When using the thermostat, connect 2 of the joints and install the gaskets according to your own pipe size requirements; screw them to both ends of the thermostat. 5. Please note that the new type and old type of this product will be sent randomly,and make sure you will not mind before ordering.