Floor Drain With Vent

If you must run drainpipes across a floor carefully calculate the amount of vertical space available.

Floor drain with vent.

Roof flashing made from heavy grade rubber lead or sheet metal holds the vent pipe in place. 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 true vent is a vertical pipe attached to a drain line that travels through the roof with no water running through it. Drain and vent lines must be positioned precisely so you should install them before the supply pipes.

All the faucets and water appliances in a house use this same system of drains pipes and vents. This is the purpose of a venting system. Venting allows water to pass out of the drains easily. The same holds true for plumbing vent pipe.

As water goes down a drain air is needed to equalize the pressure in the drain line. Through the stack sewer gases are carried up to the roof through vent lines. Today houses are vented through the roof. You must slope the drainpipe at 1 8 to 1 4 inch drop per.

True vents also have no water running through them. If a fixture is close to the stack and on the top floor the upper part of the stack serves nicely as a vent. It may be possible to simplify supply runs by moving a vent pipe over a few inches. Drain pipes take the wastewater to the soil stack.

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. 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.