The previous page is sending you to https://www.alamy.com/principles-and-practice-of-plumbing-the-highest-fixture-where-it-mayagain-connect-with-the-stack-or-extend-separately-throughthe-roof-no-soil-or-waste-matter-discharges-into-this-pipeits-function-is-to-provide-a-supply-of-air-to-the-outlets-offixture-traps-to-prevent-the-water-seal-being-broken-eitherby-siphonage-or-by-back-pressure-those-portions-of-soiland-waste-stacks-above-the-highest-fixtures-may-be-consid-ered-as-vent-stacks-a-vent-pipe-is-a-short-branch-extending-from-the-ventstack-to-the-trap-it-ventilates-two-pipe-system-of-plumbingthere-are-three-sys-tems-of-roughing-in-image372545275.html.

 If you do not want to visit that page, you can return to the previous page.