HOW TO INHIBIT A HEATING SYSTEM – ADD TREATMENT – Plumbing Tips

Posted on: January 12, 2017 by in Plumbing Videos
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HOW TO INHIBIT A HEATING SYSTEM – ADD TREATMENT – Plumbing Tips


This video covers the procedure of how to add inhibitor and treatment to your heating system the easy way! This will work for all heating systems, including combi systems, sThis video covers the procedure of how to add inhibitor and treatment to your heating system the easy way! This will work for all heating systems, including combi systems, sealed systems and gravity fed systems. We cover adding the inhibitor to the radiator directly using a simple home made tool. We cover turning off the radiator, draining it down and adding the inhibitor plus refilling and commissioning the system.

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Hold tight and I bet you think that mental plumber blokes back to tell you more insane stuff about plumbing that’s madly fun. Sorry about the delay from the last video. At the moment, work is completely crazy. So today we’re gonna look at how you inhibit a heating system if you
don’t have one of those pressure pumps, this’ll work for pressurised
system and a gravity system, and it’s my little way of doing it. In fact, I prefer to do this. I invented this actually. This is a blue Peter moment comin’ right up. So, here we go, take notice. Oh yeah. This is an old tub of inhibitor. Now one thing I thought, I thought hmm, all inhibitor caps are the same. So this will work throughout, but what I usually do is this. Get myself, you can either use a straight 15 mil compression coupling with each side. This is a 15 mil compression with a half inch male thread on the other side. What I’ve done, I’ve popped in, if you can see there, a small rubber o-ring on there, on that. Cut a small hole, push that, put that on there, and then ’cause I didn’t have any normal flat nuts like you’d use for say, a tank insert, I had to use a normal compression nut on there to tighten that up and make that water tight. Then I’ve put a larger rubber seal in there. Basically that then means that I’ve got one of these that can go across all different types of inhibitor tubs.
Now, I can screw it onto the top. Now what I have done, I’ve actually got this one tub, it’s there all the while. And what I’ve done is I’ve cut a bit of the back so then I can pull the inhibitor in there, and the best thing about it is this. Got myself a little flexible tap connector with a little valve on here. That will go into the radiator
and also a rubber connexion on there. That just pops on there like this. Basically we’re ready to go.
We’ve got our thermostat and radiator valve here, and then also we’ve got a lock share to the other end, so we’ll take the cap off that and shut that. ♫ I’m shutting the lock shield ♫ And then we’re gonna go and dissipate ♫ the pressure from the radiator. Now we’re gonna need a little dull. Right, so we got the radiator turned off. Now I’m gonna grab myself a little wee towel. Get that around the bottom of your
work area. Get yourselves a radiator key, and then dissipate the pressure in the radiator. No water should be able to get in there
’cause you’ve turned off each end of the rad. Right, see there’s hardly any water coming out. Right, so now that we’ve got this open and the pressure’s dissipated, what we do is we go down to the valve and crack the nut that is on the radiator side of the valve. Get a tub under there, and basically what you wanna do is let enough water out the radiator to allow in a tub of inhibitor. Here we go.
You might want to put a set of grips on here, just depends. You just slack this here, like that, nice and easy. And basically ’cause we’ve got our air vent up there open, it will allow water to come out this radiator. Once you’ve let out, say one of these tubs, you’ll know then that easily, that’s gonna take a whole tub of inhibitor. So, let’s let some water out. So there we go, if you know what you’re doing, you know, you can control the flow coming out quite nicely, and easily catch that inside your little tub. And we’re controlling how fast it comes out using our air vent up there and also how far our nut is slackened off here.
Right then, so once we think we’ve taken enough water out to take our inhibitor, do our nut back up here. Right, so now we’ve got a radiator
that’s pretty much empty. There’s probably a bit of water in the bottom here, but now we know ’cause we’ve got a lovely full tub of water here that’s just come out of this rad, that it’s easily gonna be able to take a whole tub of inhibitor. Now what I would do is usually, I’ve got the other end.

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