Prier® P-RH4 Sanitary Roof Hydrant stores water in a lead-free canister instead of requiring a drain line like traditional roof hydrants. While opening, the stored water re-enters the flow path and is first to exit the hydrant. The P-RH4 uses a piston system, rather than venturi, so it does not require winterization. The roof mounting bracket enables the hydrant to be attached to any structural member with rigid support, instead of to the skin of the building. The bracket requires a single penetration point in the roof of 3-5/8 in and can be attached to concrete, wood or steel, I-beams, trusses, perlins or other structures with standard construction materials (unistrut, threaded rods or other).