Pro-Pal valves are your best choice for efficient installation and system operation and for helping to control costs. Pro-Pal Valves combine commonly used components into a single forged brass alternatives that will save time and space in any installation. Instead of just building your next piping system, innovate it with Pro-Pal Series Valves. The Dielectric Water Heater Supply Valve with Expansion Tank Service combines multiple components into a single, forged DZR brass solution to up-grade your next water heater and expansion tank installation. Designed for use with residential, commercial in residential or commercial residential, commercial systems. Refer to specification sheets for additional technical information. All Webstone products are backed by a limited lifetime warranty.