Anti-siphoning device for venting drain lines

摘要: The anti-siphoning device includes a T-shaped valve body having downwardly facing opening, an upwardly opening and laterally opening. Constrained for vertical movement within the is hollow cylindrical float closed lower end normally closing of body, open upper so that air can pass through into interior valve, out circumferentially spaced holes then body. connected to outlet sink or basin be drained. Waste water entering via buoys upwardly, passing outwardly along with When no waste flowing, weight seals against annular seat innerjacent sewer gases will not flow past valve. Also, located in portion preventing from but permitting enter when reduced pressure exists due