EA Class Anti-contamination Check Valve, 1 1/2 inch with threaded union RV281-11/2A

Protects drinking water from backflow of contaminants

The RV281-11/2A anti-contamination check valve prevents reverse water flow – i.e., situations where contaminated water from the installation could return to the potable water network. This is a critical function in locations where drinking water safety is a priority: in homes, commercial buildings, hospitals, or industrial facilities. It complies with the requirements of standard EN 1717 and is classified as category 2 protection, meaning it guards against moderate contamination risks – for example, from heating systems, taps with chemical additives, or cooling systems.

Construction that operates silently and without pressure loss

Constructed from dezincification-resistant brass (DZR), the valve is corrosion-resistant and durable for long-term use. The seal made of EDPM (ethylene-propylene-diene) maintains flexibility even at temperatures ranging from 2 to 65 °C – without risk of cracking or loss of tightness. The cracking pressure is only 50 mbar, meaning the valve opens at very low pressure – it does not overload the installation while effectively blocking backflow.

The BSPP-G (ISO 228-1) threaded connections are standard and compatible with most piping systems. Each connection length is 85.5 mm, facilitating installation even in tight spaces. The 90° angle allows mounting in any position – horizontal, vertical, or inclined – without affecting performance.

Does not cause water hammer and has low pressure losses

The valve does not generate characteristic "hammer" noises upon closure – thanks to its designed construction and closing spring, the movement is smooth. The Kvs = 38 value indicates high flow capacity with minimal pressure loss – the installation operates more efficiently, and pumps do not need to run at full capacity. It also meets the requirements of noise protection class 1, which is important in residential buildings.

All materials comply with UBA (German Federal Environment Agency) guidelines and meet DVGW standards for drinking water – confirming their safety for human use. There are no UL, FM, or KIWA certificates – but this does not change the fact that it is approved for use in water supply systems in Europe.

The manufacturer's warranty is 5 years from the date of production – underscoring its durability and quality of workmanship.