The VAP is designed to eliminate back vents by allowing air into the drain lines while the fixture is draining. An economical solution to preventing trap siphonage and backflow of dangerous sewer gases. The VAP can be securely hand tightened.
Designed to prevent trap siphonage at the fixture.
1-1/2 Threaded MNPT
The VAP Automatic Plumbing Vent is certified to NSF-24.