What is a riser pipe? A riser pipe is a durable metal or plastic pipe which extends from the water supply line to the water heater and up through the walls to deliver water, steam, or gas to the lavatories, kitchens, and plumbing fixtures on the upper floors of a building and branch to up to two higher levels.

What are plumbing risers used for?

Riser – a vertical metal or plastic supply line that connects a faucet or shower fixture to the water supply stop valve. It is usually made of copper though Metal Flex Risers are corrugated to facilitate bending. Also, the name of a supply line that rises from one story to the next.

What is a riser on a sewer line?

Sewer riser means that portion of the pipe of the sewer lateral which extends vertically to the ground elevation and terminates at each manufactured home or mobile home stand.