Brass Foot Valve 1-1/4 inch NPT Heavy Duty Spring Check Valve Female Connection One Way Foot Valve Backflow Preventer for Well Jet Pumps Foot Valve Fetures: The NPT one way check valve is made of heavy duty premium solid brass material, which make the brass check valve more strong and durable, for long time working. Working Pressure: 16bar (232 psi) Working Temperature: from -10 ℃ to +120 ℃ (from 14℉ to 248℉) Thread: 1-1/4-11.5NPT Specification: -Package including a brass foot valve - Please note that the dimensions marked in the picture are measured manually and may be slightly different from the actual size - NPT Thread Size is a nominal pipe size and it does not represent the actual diameter. Please look the size chart for the specific thread diameter 【Brass Foot Valve】The NPT thread foot valve is designed with many min round hole which can filter out many large impurity particles. The round hole design of the brass bottom valve is not only beautiful but also very practical. The hexagonal edge design makes this brass foot valve easier to install and take off. 【Qualified Material】The spring check valve body is made of heavy duty brass, the spring is stainless steel with stable performance, the gasket material is NBR, long service life and not easy to leak. 【Brass Spring Check Valve】: The thread of our brass check valve is NPT which is taper thread, has a good sealing, the working Pressure is 16bar (232 psi), the working temperature from -10 ℃ to +120 ℃ (from 14℉ to 248℉), allow it can be used in different environment. 【Function】The basic function of the water foot valve is to prevent water from flowing back down the pipe. They have two ports, one as an inlet for the water and one as the output for the water. The brass check valve can also be described as a brass one way valve or brass non return valve that would only allow the pump to pull water up but does not allow the water to flow back down. The main purpose of the 1-1/4'' NPT check valve is to prevent backflow in the system. 【Wide Application】The brass non return valve is usually used for pumps, pipe systems, wells, and anywhere else you use a pump with check valve and pressure relief valve function.