The body of the PEX ball stop valve comprises two separate halves. The material used for the body is crucial in determining the overall strength and durability of the valve. The two halves of the body are connected by a threaded joint or a welded joint. The material used to make the valve body is generally selected based on its corrosion resistance, strength, and compatibility with the fluid that passes through it.

The most common material used in PEX ball stop valve bodies is brass. Brass has high corrosion resistance, making it a viable option for applications that involve corrosive fluids. Furthermore, it is a strong and ductile material that can withstand high pressures and temperatures. Brass is the most affordable material for valve bodies compared to stainless steel or titanium.

Another material used in PEX ball valve bodies is stainless steel. Stainless steel has good strength and corrosion resistance, making it suitable for high-temperature applications. The strong austenitic structure of stainless steel provides good durability and resistance to cracking. However, stainless steel is expensive compared to brass, making it less commonly used in PEX ball valves.