Maxi Vent 3 To 4 Inch Air Admittance Valve For Plumbing Venting ABS Plastic Effortless Venting For Single Fixture Or Branch Circuits Up To 500 DFU Meets ASSE 1050 1051 NSF 14 IAPMO Standards
✔️ Vents up to 500 DFU on stack; ABS plastic; ASSE 1050/1051
This compact air admittance valve provides automatic venting for DWV systems, commonly used on single fixtures or small branch circuits to balance pressure and reduce roof venting needs.
✅ For venting single fixture, individual branch, circuit vent or stack
✅ ABS plastic construction for durability
✅ Meets ASSE 1050, 1051; NSF 14; IAPMO standards
✅ 15W940 model includes replaceable cabon filter to reduce odors
✅ Color: White; Package dimensions 5.5" L x 5.5" W x 8" H
✅ 1ATD5 vents up to 500 DFU on a stack; 1ATD6 vents up to 160 DFU on a branch and up to 24 DFU on a stack
💡 What is an air admittance valve used for in plumbing venting and how does it work? An handy device that balances pressure in drainage systems, letting air in to prevent siphon and reduce roof venting needs.
- balances pressure in DWV systems
- allows air entry without roof vents
- complies with ASSE 1050/1051, NSF 14, IAPMO
- suitable for single fixtures, individual branches, or stacks