How PVC Compression Fittings Work – Plumbing TipsPosted by fastekpl in Plumber Talk, on May 16, 2017
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A brief video about how PVC compression fittings work. Including connection to basin waste and the standard compression fitting. Also how their tapered rubber seal and slip collar create a water tight seal. For more information visit our website at http://www.plumberparts.co.uk
Just watching England play cricket. It’s at times like this that all I really want to do is tell you how PVC compression fittings work. Let’s have a look.
Here is a length of inch and a quarter PVC pipe. Now I’m going to show you the two different types of compression fitting there is for PVC. Firstly, we have a compression fitting that goes onto the bottom of a metal flange. You often see these go onto the bottom of a wash basin or a trap, and they have a small rubber seal just here. The trap or whatever you’re coating to seals on here, and there’s a small, you can see the thread inside this now, that twists up round, and makes a watertight seal. On the other side of this we have the more traditional type of PVC compression fitting. We have our nut, we have our anti-slip collar here, and then the actual tapered rubber seal just here. Now the pipe sits in here just like that, just like so. So let’s have a look at this, the nut slips on first here. The anti-slip collar then goes on. These can be either blue- or red- coloured. Now the object of this is, as that nut turns round, if that was just going onto the tapered rubber seal that would just pull it up and it would never tighten up properly. Now the tapered rubber seal goes on, and then you push it all together, making sure when you do so that the pipe goes fully home, making sure that your tapered rubber seal is happily down within the fitting. Then bring up your nut. Most as long just tighten up by hand, but you can do them with grips. Be careful when you do, because metal grips on plastic, obviously metal always wins, and it will rip apart. And then you just tighten that up, and that there then creates a watertight PVC seal.
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