Non Return & Pressure Relief Valve Non return & pressure relief valve is to prevent water back flow and release pressure of the water heater tank.This valve is used on hot water tanks less than 50L, used on compact water heater like Duoetto 12v / 240v and Aqueous hot water heater, installed on the cold water inlet of the water heater, in order to ensure normal use of the water heater tank, to prevent cracking, improve the service life of the hot water heater tank(according to different production batches, the color of the handle is different, the color will be shipped randomly)Pressure reducing valve Non return one way1/2″ Male inlet, 1/2″ Female outlet
