Product parameters: 3/8 inch fitting. Voltage: 36 volts. Inlet pressure: 15 - 50 psi. Waterproof Level: IPX4. This iSpring PMP53 booster pump is the replacement pump for the RCS5T Reverse Osmosis water filter system. With the pre-wired quick-connection, it can be easily connected to the transformer. Please note: Transformer is not included. If you need one, please search iSpring ATRF53. Instead of replacement, if you want to add a booster pump to the RO system, you may also need other accessories to automatically turn on / off the system, such as a Low- & High-Pressure Switch, a Feed Water Solenoid Valve, an Auto Flush Solenoid Valve, and a Transformer.