Matco-Norca offers prefabricated boiler header manifolds for use in residential plumbing applications. They are available in 1 1/4-inch and 1 1/2-inch diameters, and come in two-, three- and four-zone configurations. Matco’s boiler header manifolds can be used on the supply and return, eliminating the need to make a boiler header out of pipe nipples and fittings. All Matco boiler header manifolds are shipped with thread protectors on all