Plumbing Vent Piping Tips

Vent pipes are needed to supply air to water pipes. Without proper air replacement, your drain lines could create a vacuum in the plumbing system. Be sure local regulations allow anyone other then licensed plumbers to do work on your plumbing vent piping.

Source: http://www.askthebuilder.com/883_Plumbing_Vent_Piping_Tips.shtml

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