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 E-Tank Service Assembly is a hydronic expansion tank support arm that centralizes several system functions within a neat, compact footprint. Designed for use with water, oil, glycol mix in residential or commercial heating systems. Refer to specification sheets for additional technical information. All Webstone products are backed by a limited lifetime warranty.