-14.7% Drain covers Raritan WH3 - Pressure regulating valve - Raritan FA1031 €73.89 €86.62 Replacement for Boiler Raritan 1700 series. 75 PSI decompression valve. All models use the same pressure relief valve. WH3 is inserted into the tank. To remove, use an adjustable wrench or hose clamp. Add PTFE tape to the new valve and reinstall the new part in reverse order. Add to cart