Compact Mini Vent Air Admittance Valve With Pvc Adapter Delivers Zero Drama Venting And Nailed It Installation For DIY Crews Craving Smooth Plumbing Fixes With Gravity Seal That Locks Water Traps Secure While Keeping Waste Flow Sweet

Single Sealed Drain Air Admittance Valve With PVC Fitting
✔️ Fits 1.5 inch pipe 38mm Holds 160DFU gravity closed

This handy air intake valve slots right behind your vanity sink, utility tub, or bar countertop without running any pipes uphill. Homeowners swap it for clumsy roof flashing because it stops stinky methane from drifting into living spaces while keeping drains flowing smooth. The unit comes packed as a single piece ready to drop into your existing rough-in setup.

✅ Handles 160 drain fixture units on branch lines and 24 on stacks
✅ Seals shut via internal weight to block sewer gas and insects
✅ Rated for temperatures from minus forty to 150 degrees Fahrenheit
✅ Compatible with standard 1.5 inch 38mm and two inch 50mm ABS plastic drain tubing

💡 How do gravity drain valves prevent sewer gas from entering my home?

A proper air admittance mechanism balances negative pressure inside your waste lines to maintain clear drainage paths.
- Internal disc opens automatically when water flows down your main stack
- Ambient air enters the plumbing network to equalize suction instantly
- Weighted plate snaps shut the second flow stops to trap methane fumes
- Eliminates the need for expensive drywall cuts or roof penetrations