  
 Crown Vent Guards are quick & easy to install and they prevent birds, squirrels and other small animals from entering ventilation pipes and drainage systems. This eliminates clogging of main lines and vent lines and keeps sewer gases from being trapped & backing up into the house. Crafted of PVC, it is all-season weatherproof. Suitable for: PVC high-efficiency furnace vents, newer water heater PVC vents, radon vents, sump pump vents, and PVC dryer vents. Fits 3" PVC roof vents (can be made to fit larger/smaller sizes with adaptors available at any local plumbing supply store). Note: Price is for 2 guards.
JMC Plumbing
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