This system prevents the undesirable backflow of contaminated water from a washer’s drain hose again into the clear water provide. It capabilities as a one-way valve, permitting wastewater to exit however blocking any potential reverse circulation. A typical instance is an air hole, a small vertical pipe put in above the very best potential water degree of the washer’s standpipe or laundry tub. Different designs would possibly contain built-in examine valves throughout the drain hose connection.
Stopping backflow safeguards public well being by eliminating the chance of cross-contamination between wastewater and potable water sources. Traditionally, the absence of such protecting measures led to cases of contaminated water coming into the ingesting water provide, posing vital well being hazards. These units are actually mandated by most plumbing codes to make sure the protection and integrity of home water techniques.
