PVC Rain Caps 2" to 30" Rain Cap Dimensions and List Prices. Inventory is sold and received continuously throughout the day; therefore, the quantity â¦ Oatey® 3" or 4" Vent Pipe Cap. New RadonAway GP301 Radon Fan 23006-1 56-100 Watt â¦ Radon Away Easy Read Manometer. Aura PVC Vent Cap, 4â³ inch diameter exhaust vent with an adapter to fit over a 4â³ inch PVC Pipe The Aura PVC Vent Cap, model AV-4-PVC, is the perfect solution to exhaust and cap a 4â³ inch schedule 40 or 4â³ inch schedule 80 PVC â¦ $259.99. Please Note: Prices, promotions, styles and availability may vary by store and online. Free shipping . 4" PVC Duct Rain Cap A, 1034-WCA-04 1034-WCA-04. $11.95. $23.95. 4" PVC Duct Rain Cap B, 1034-WCB-04 1034-WCB-04. Add to Cart + Add to List | + Compare. Free shipping . PVC rain cap fittings are made from Type 1 Grade 1 PVC â¦ 5" PVC Duct Rain Cap â¦ Add to Cart + Add to List | + Compare. 3 inch PVC Rain Caps Radon Fans. $289.99. Harrison Machine & Plastic can fabricate your PVC duct rain cap fitting upon Harrison specifications or customer specifications.