How To Vent Shower Drain

If the drain lines in your home have poor venting as in figure a for example water rushing down the drains will pull water from nearby p traps.

How to vent shower drain. The plumbing vent pipe is a vertical pipe that attaches to the drain line and runs through the roof of a home. Toilet vent option 1. If the drain line runs away from the wall where you want the vent use a reducing y and a 45 degree street elbow to point the vent line toward the wall.

As water goes down a drain air is needed to equalize the pressure in the drain line. Above the intersection with the sink the vent pipe simply acts as a vent for both fixtures and so can be smaller 1 5 in diameter. The pipe leading to the main roof vent is called the vent stack.

Between the intersection with the sink s drain pipe and the toilet s waste pipe the vent pipe is acting as the sink s drain and the toilet s vent and so must be 2 in diameter. When installing your vents it s highly recommended that you plan out your drain lines to minimize the risk of clogging. If the toilet drain does not connect directly to a vent you must find another way to vent it.

This is the purpose of a venting system. They lead into larger branch drain pipes which lead into the 4 inch stack. In a drain one of the primary purposes of a fixture vent is to break the siphon.

Because a standard sink drain exits through the wall behind the sink it sits higher than the tub shower and commode drains making it an optimal spot for a vent. This method is mostly used when the shower or the sink is sitting far apart or when either the shower or the toilet sink fixtures drain pipe is not connected to the main drain pipe of your bathroom. Yet another method that you can use to vent your bathroom sinks and shower is separate vents.

Figuring out your drain waste vent lines dummies the drainpipes collect the water from sinks showers tubs and appliances the waste pipes remove water and material from the toilet the vent pipes remove or exhaust sewer gases and allow air to enter the system so that the wastewater flows freely the drainpipes are made of cast iron galvanized pipe copper or. It helps maintain proper atmospheric pressure in a building s waste system and channels the exhaust gasses to the vent. If the entire cross section of a drain is able to fill with water downstream of the trap a siphon can be created for a sufficient period of time to pull enough water out of the trap to render it ineffective.