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Call toll free M-F 7:30-4:30 EST 1.855.373.5623 $5.55 Flat rate shipping US orders under 5lbs (limited to 48 contiguous states)

Due to a high demand expect lead times of 5-7 days on special order Prier and Mansfield items.

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Backflow Preventers

Prevent fluids from re-entering your building’s drainage systems with Complete Plumbing Source’s various backwater valves. We carry a number of industry leading brands and various sizes of backflow valves.

The sewer backflow preventer selection we have offers an economical solution to reduce the possibility of flooding and sewer backups. Many building codes require these backwater valves, but it is in a homeowner or building owner’s best interest to install or replace these in order to protect from backwater.