Floor Drain With Vent

Vents are a major component in a home s drainage system.

Floor drain with vent.

Roof flashing made from heavy grade rubber lead or sheet metal holds the vent pipe in place. You must slope the drainpipe at 1 8 to 1 4 inch drop per. This is the purpose of a venting system. A true vent is a vertical pipe attached to a drain line that travels through the roof with no water running through it.

Venting allows water to pass out of the drains easily. It may be possible to simplify supply runs by moving a vent pipe over a few inches. If a fixture is close to the stack and on the top floor the upper part of the stack serves nicely as a vent. As water goes down a drain air is needed to equalize the pressure in the drain line.

The true vent is aligned vertically and attaches to your drain line through the roof. Drain pipes take the wastewater to the soil stack. Drain and vent lines must be positioned precisely so you should install them before the supply pipes. Today houses are vented through the roof.

The re vent or revent pipe is routed upwards above the fixture and then horizontally over to a tee that attaches it to the main stack vent pipe. A re vent or revent pipe in a plumbing drain waste vent or dwv system is an auxiliary vent that is attached to the drain pipe close to an individual plumbing fixture. All the faucets and water appliances in a house use this same system of drains pipes and vents. Through the stack sewer gases are carried up to the roof through vent lines.

If you must run drainpipes across a floor carefully calculate the amount of vertical space available. This is best implemented if a fixture rests close to the stack and the top floor of your home allowing the stack to serve as a vent.