B & I Plumbers are installing a water closet carrier system which will support a row of wall-hung toilets in a large gang bathroom. The system is comprised of a variety of different piping materials.

CPVC Sch80 (dark gray pipe) and CPVC Flowguard-CTS (light yellow with yellow stripe) plastic piping deliver water to the copper stubouts, which will connect to the toilet flush valves.

The white piping is PVC-DWV Sch40, for drain waste and vent. The larger pipes at the bottom of the carriers send the waste to the building sewer. ; the smaller pipes rising above the carriers are for venting, to allow air flow through the drain pipes to prevent stoppage.

The blue cast iron Zurn water closet carriers serve as structural supports for the wall-hung toilets, as well as piping into the PVC drainage system. The piping system without the carriers (on the left of the last photo) will serve a row of urinals in a men's bathroom.