The Oatey Mushroom Vent Cap is made of high-impact PVC and requires no assembly

It includes 3 hex-head bolts for ease of installation

The fully assembled mushroom vent cap fits 3 in

and 4 in

vent stacks to prevent debris, water and various critters from entering the vent pipe

Oatey products have earned the trust of plumbing professionals for over 100 years