The McAlpine ST90CP10-NRV 90mm x Spring Loaded Non-Return Valve with 1.5" Solvent Weld Outlet Socket is a plumbing fitting that is designed to prevent backflow of wastewater. The valve features a spring-loaded mechanism that allows water to flow in one direction but prevents it from flowing back in the opposite direction. The valve has a 90mm diameter and a 1.5" solvent weld outlet socket, making it compatible with a wide range of plumbing systems. Its overall height is 53mm, which makes it compact and easy to install in tight spaces. One of the key benefits of the McAlpine ST90CP10-NRV valve is its ability to prevent backflow of wastewater. Backflow can occur when there is a sudden change in water pressure, which can cause contaminated water to flow back into the clean water supply. This can pose a health risk, making it important to have a non-return valve installed in your plumbing system. The spring-loaded mechanism in the valve ensures that it operates smoothly and efficiently, even in high-pressure situations. The valve is made from high-quality materials that are designed to withstand the rigors of daily use and to provide long-lasting reliability. Overall, the McAlpine ST90CP10-NRV 90mm x Spring Loaded Non-Return Valve with 1.5" Solvent Weld Outlet Socket is a high-quality plumbing fitting that can help to prevent backflow of wastewater and ensure the safety and cleanliness of your plumbing system. Its compact design and easy installation make it a popular choice for both DIY enthusiasts and professional plumbers alike. 90mm Shower Trap with Non-Return Valve 90mm x Spring Loaded Non-Return Valve with 1.5" Solvent Weld Outlet Socket Overall height 53mm The valve acts as a non-return valve, the weight of the water discharge will open the valve and it will reseal when the discharge has ceased thus prohibiting foul air from entering the dwelling The valve eliminates the release of foul air due to back flow The valve can be easily removed to facilitate easy cleaning of the trap

It is designed and manufactured by McAlpine, a UK-based company that specializes in plumbing products.

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