HOW TO INSTALL A CONCEALED TOILET CISTERN – Back To The Wall – Plumbing Tips

Posted on: February 6, 2017 by in Plumbing Videos
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HOW TO INSTALL A CONCEALED TOILET CISTERN – Back To The Wall – Plumbing Tips


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Hello, and welcome to this plumberparts.co.uk video. Let’s look at how to install a concealed system. It’s super easy, right? The first thing you’ll do, right, is pretty much measure the holes for the back of the loo.
Okay, now, the way to do that is firstly, get the loo up, so it’s roughly in front of where you want to put it, okay? Then, get your tape measure and measure down, okay, so you can’t see your mark. Now, this is 500 across, so that’s 250, right. So, I’m gonna measure down there for my mark. But see, your measurements could be slightly different, right? So that’s my centre line. I’m not gonna try and make many marks above that. Then, what I’m gonna do is, I usually just have a look and see how far up I can cut my hole. Now, I usually do this with an angled pencil, but as long as the hole is lower than the back of this toilet here, so you can’t see it, then that’s fine. So that’s part one. Done.
Next, what you want to do is have a look at the height of your loo and also the width. So you get down here, measure this width here, so that’s 220. I want to measure inside that, but I also want to give myself plenty of room to be able to work with the with the multi equipment that’s going to be in the back a here. So, I’m gonna say we’ll probably make that so it’s pretty wide. We’re gonna go for 1800. So, 180 divided by two is 90. So, down there like so, I’ll show ya. My centre line here. So, one mark there, the other mark there, okay? So we’ve got our pencil marks on there now. Now we know that if I marry this up, I know that that’s enough that you’re not gonna see that or anything. 220, that’s the narrowest point, and that there is only 1800, so we’ve got loads of room. The next thing you want to do is look at how, where the lowest point of the hole needs to be, So, we’re gonna say almost 5, but, basically what we’re gonna do is cut out a rectangular shape, like this, just like that there, and there, that’s the next thing. Hold tight. A must if you’re ever gonna be a plumber. A mold-it master. They are absolutely brilliant for this sort of thing.
Right, so now we’ve got a lovely hole in the back here. Ready to take our toilet a bit to the box. So you should be able to now marry up the loo, and have a quick look down this side here. That’s lined up there. Absolutely loads of room there for our couplings to go in. I’m not gonna show you now, but I’m quickly put on these screws to the floor. Right, so now we can concentrate on our flush. We know that this flush pipe can go up pretty much this high, which is ahead of the high mark. So, we just mark this up quickly now, right. So, our maximum flush height we’ve got, we know is pretty much in line with this pencil line here, okay? So, we know then that we can hang our flush pretty much, always taking to account the actual height of the flush bit, as well. So, what we’ll do here is again measure out my centre, which I know from here is 25, then I just gonna get this so this is centred, as well, and once I know exactly where I’m going I can screw this to the wall. I’m gonna try and leave enough space for the lid to go on afterwards, okay?
Right, now, we’ve got that one we can unscrew these two nuts here and that should pop our flush unit in. Right, so while we’re here we can just get our flush unit put in, get that all tightened up and in. So, there we go. We’ve got our flush unit in and we’ve also got our fill valve in. We’ve got our braided hose just down here, as well. Do that up, while I was filming. About as fun as having your head kicked in by skinhead. So, what we want to do now is, basically, we need to get our flush cut off so it’s fully inside our flush unit, but that will only go that far up at the moment. So, we need to know exactly how much to cut off this first bit here. So, what we’re gonna do here is you measure from the bottom of the loo up to the centre of the hole there, so that’s 350. What I’ll usually do then, is I’ll measure up from the top of here. Mark that as 350 there and then, just line it up. That sticks out 350 there. Then I know exactly where to cut if off. Done that. Then I’ve got my nuts on a slip washer here and then an actual rubber washer. Push that up and into the fitting like so. So then, basically, you know that this is exactly the right height to receive the loo. In a minute, we’re gonna cut this back cause this might stick into the way of the loo. We’ll have to measure, basically, what you do, you measure up until it butts, okay, and then out, and if I was you, I’d add about another 5 mil.

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