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Oatey Rain Collar For No-Calk Roof Flashings can be used as a secondary seal for commercial and residential applications that require a watertight seal for roof penetrations around the plumbing vent pipe.
From the Manufacturer
Oatey products can be found in residential and commercial applications and have achieved excellent brand name recognition with consumers. All products are backed with the highest quality technical and customer support programs in the industry
Mark Miller
August 12, 2025
This rain cover is simple in operation, easy to install, fits several size pipes, and is reasonably priced. The cover stretches over the vent pipe. I bought the up to 3" rain cover. It stretches open unmodified for pipes up to 2" in diameter. For 3" you'll need to cut out some material. The area to cut away is already molded into the rubber (look on top and the under side). The instructions are also molded into the rubber of the rain cover itself (top side), and you can even see it in the photos posted by Amazon and users. This boot does not require sealant because it fits tightly on the pipe; however, if the cover will be in contact with any sealant, make sure it's not petroleum based as petroleum will degrade the rubber. Silicone will work fine. I was very pleasantly surprised by how easy it was to install, especially considering I was 3 stories up on a very steep roof and anxious to get down.
B.T.L.
August 8, 2025
These are perfect for fixing those sun / U.V. damaged vent stack seals until you can replace the entire flashing / seal. Our roof has 4-6 years or so "left". At that point, I'll replace the vent stack flashing completely, but in the meantime, these fit snugly over the PVC and slight right down over the old shrunken, deteriorated seal. A real timesaver for sure. They work "As-Is" for 1.5"-2" pipe and for larger 3" pipes, they have an "embossed" seam that can be easily trimmed evenly to fit perfect.
Darryl Kuhrt
July 28, 2025
These are a great, inexpensive way to repair the seals around your plumbing vent pipes on the roof. Add a tube of black roof caulk to get a good water-tight seal.
KaptSlow
July 5, 2025
I installed these rain collars on five vent pipes. The outside air temperature was 48 degrees. Two pipes were 2.5" OD (2-3/8 measured), and three were 2" OD (1-7/8 measured). The 2" vent pipes were easy. The 2.5" pipes were a little more challenging, but follow the tips below, and you too will be successful.Installation:1. Get yourself a bucket of Very Hot water and toss the rain collars in - letting them soak a bit to soften them up before installation.2. Find an empty spray bottle and fill it with .5oz of dishwashing liquid and 8oz of water. Don't shake it; just swish it around to mix the water and soap.3. Climb up on the roof with your bucket (collars still soaking inside) and spray bottle. It helps to have someone hand you the bucket and bottle once you're on the roof.4. Spray a liberal amount of soapy water onto all sides of your vent pipe. On 2.5" pipes, be sure to get some all the way around the top of the vent pipe opening.5. The collars will slide right on and down a 2" pipe. Be sure not to force it down too far, as you want a nice smooth surface for the water to run off.6. 2.5" pipes are a bit more fiddly. Carefully stretch the collar opening over the top of the vent pipe using just enough force to get it on. Don't pull too hard, or you'll deform the shape of the collar on the bottom, and then it won't seal well to the flashing. If you do make this mistake, as I did, get it seated as best you can. Then, go back inside the house and refill your bucket with some really hot water. Climb back up onto the roof with your really hot water and pour about 1/2 of it onto the collar. Then, gently prod it back into the correct shape. If it still isn't sitting correctly after the first try, pull it up an inch or so, then use the rest of your hot water to get the collar very warm and take another crack at it. It's easier the second go-round.7. Carefully climb back off the roof, put your bucket, bottle and ladder away. Grab your beverage of choice, go back outside and admire your handiwork - knowing that you just saved yourself a minimum of $150.00!
Daily review
June 2, 2025
My roof still has some life left, but my old rain collars did not. I noticed daylight coming through in my attic, and when I went up top, all five of my rain collars were cracked and deteriorating. They're about 20-25 years old, so that's allowed. If you can hear water trickling when it rains but you can't see any leaks in the ceiling, it might be that one of these has worn out and it's running down the pipe.I ordered three of these plus a couple of larger sizes for my other vent pipes, and got to work. I made sure the pipes were smooth, cut or pulled the rings out for fit on a couple, and slid these on, followed by a couple of beads of caulk. I would recommend measuring your pipes as well as the old rain collars to select the appropriate sizes. For me, I ordered the largest ones that would fit each pipe, and they were a perfect match, since the old ones were also from Oatey.It's an easy repair and can extend the life of your roof or for whatever emergency repair you might need to do.
H3
May 12, 2025
Well did not use them for there intended purposes but worked out great for filling in the void when installing 4inch fog lights on a hummer h3
Billy D.
March 25, 2025
Shipped quickly & with NO issues. Pleased with the quality & price of product. Fit was accurate & it was super simple to install. It serves it's purpose well but longevity/durability of product are yet to be determined (time will tell). Would purchase again if needed.
John W. Walker
February 7, 2025
Forget replacing the vent, just slip this over the top of the pipe and slide it down. Works great, cheap and easy. If your vent is bad, your roof is going to need replacing at some point, wait till then and replace all your vents.
Remi
January 22, 2025
Seems very well made. It is reasonably thick and very flexible. It was super easy to install by stretching the center hole over the pipe. I used some soapy water so that it slid on easily. It sat perfectly on the collar of the damaged boot with no air gap. Only time will tell how long it will last.
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