With a pressure relief valve included, the tankless water heater kits consist of separate hot and cold valves. The hot and cold valves are available in union x threaded or union x solder ends with an integral ¾-inch FNPT relief valve port. Made of brass and steel with an EPDM O-ring, they carry a 600# nonshock rating. Both valves have a full port, ¼-turn design, blow-out proof stem, and an integral hose end drain/purge port and cap. The companion ¾-inch pressure relief valve is a 150#, and designed specifically for protection of hot-water supply systems. Compact and economical, the pressure relief valve is installed directly on the tank or in a tee and can go on either side of the water heater. It automatically resets after providing pressure relief. Made of bronze, brass, and stainless steel, with a silicone seat disc, the pressure relief valve carries ASME Section IV, ANSI Z21, and CSA 4.4 certifications.
Caleffi manufactures innovative components for hydronic heating and cooling, plumbing, and heat metering systems for domestic, commercial, and industrial buildings.
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