Hydro-Core® is the ideal solution for near boiler piping or secondary loops. By combining the Webstone Isolator and Ball Drain with closely spaced tees, the Hydro-Core® Manifold system eliminates costly field fabrication, avoids precise calculations and simplifies future service. 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.