6 Proper

Proper ventilation is an important part of a plumbing system. Every plumbing fixture, from a toilet to a

shower, needs to be connected to ventilation piping. The pressure of outside air drawn in from ventilation pipes

helps push waste or used water down through drain pipes. Vent pipes also lead through a roof to expel

harmful gases or unpleasant odors from a home. Try these steps to vent plumbing.

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Choose a pipe material for your venti-

lation system. Consider which pipe material best fits your needs, budget, and any existing piping.

Plan the location and layout of your

piping.Consider asking a professional plumber to help you with this.

Visit a hardware store to get pipe,

fittings, and materials for joining and

supporting your vent stack.Measure and cut the pipe you need.

Connect a stack vent to a soil stack.The soil stack pipe connects to a house's main drain and extends upwards towards

the roof. Secondary pipes carrying waste or used water from plumbing fixtures

run into the soil stack to be emptied.

Run more vent piping as directed by the

configuration of drain pipes or other

requirements.Vertical vents should be as straight as possible to prevent condensation from

building in the pipes. Horizontal vents should slant down toward fixtures so

gravity can assist in moving waste and water..

Mark and drill a hole in the roof to fit

the width of your vent stack pipe. You may be able to hammer a nail through the roof as a general reference for your

drilled hole. A hole saw may be used for making the hole for the vent stack.

Source:http://www.buyerschoiceinspections.com/plumbing-fundamentalshttp://en.wikipedia.org/wiki/Drain-waste-vent_systemhttp://en.wikipedia.org/wiki/Trap_(plumbing)http://www.plumbing-basics.com/drainage/vent-piping.htm

* Familiarize yourself with local plumbing and building codes. The kind of pipes you can use and how they will be structured depends on your local code requirements.

* Pipe options include brass, copper, galvanized steel, cast iron, lead or PVC. Depending on the gases emitted by waste running through your system, some pipe materials can corrode more easily than others.

** The vent stack should be equal in size to the waste trunk or line

you are venting, for instance, a 3 inch sanitary line requires a 3 inch vent.

* Plastic or PVC pipe cannot be used in to go through an attic space that provides return air for an HVAC system due to fire codes in many juridictions.

* Remember th* Remember that you will need to support the weight of your vent stackout, so lighter pipes may be preferred.

The amount of vent piping required may be based on how many cubic feet of air you need to move through the pipes as well as local regulations.

Buy pipe fittings to connect pieces of pipe together. Fittings come in different shapes and sizes depending on the types of pipe being connected and whether turns or bends are

needed.

A stack vent will lengthen the vertical soil stack pipe to help it eventually go through a roof. It should extend above the highest horizontal pipe connected to the soil stack.

* A type of pipe called a common vent may be used to vent 2 fixture drains where they meet and connect.

* Individual vents are pipes that connect with the ventilation system above plumbing fixtures. The individual vents equalize pressure on a fixture trap, a curved piece of pipe that must hold water and prevents gases from building up inside a house.

** Vertical ventilation pipes called vent stacks provide air circulation to any part of the plumbing system. Vent stacks can run parallel with waste pipes to ensure proper ventilation in tall buildings. Sub-vents may be branched together to exit 1 vent stack, allowing for only 1 hole in the roof for ventilation.

Ventilation Plumbing System