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Discuss Going to install a Magnetic filter some help needed identifying pipes in the Central Heating Forum area at

  1. Anthony7193

    Anthony7193 New Member

    Hi, new member but would appreciate any help, I am a DIYer but generally consider myself competent enough to do basic plumbing so am going to put in a Magnaclean Professional 2.

    I want to ensure I put it on the return as I am also going to be borrowing a Magnacleanse for an initial deep clean.

    So I am identifying pipes etc and am a little stuck so before I buy a small camera and/or rip up some floor boards I wanted to fully understand what I was seeing.

    System is gravity fed with a pump and Y plan valve and the tank is an Indirect Open Vented unit, so I have identified the feed which I can only assume comes from the boiler, this then goes as usual, pump then 3 way valve.

    I can see the return from the H/W tank and can see it disappear into the floor at the back of the airing cupboard which is making me fearful that the Return from the central heating must under the floor join into this before making its way back to the boiler, does that seem normal behaviour, I can see the top of the boiler there is 2, 22mm pipes so can only assume that one is feed and one is return, there is about 3m between the point the H/W return and the boiler (the boiler is downstairs with the airing cupboard upstairs).

    I do however have some confusion and unfortunately do not have many pictures of what I mean on me.

    Firstly there is a 15mm pipe with an isolating valve (not a gate but the type I use to isolate taps etc) that runs from the H/W return and the feed after the pump, reading online it suggests it might be a release valve in case all TRV's are closed (I have 2 towel rails so not an issue) but obviously as it is an isolating valve that does not really make sense, I confirm that the top half is red hot while the below is only warm as expected I guess as it is the return.

    Second thing is I have a some extra pipes that feed into something I have never seen before, picture attached.

    And to make this even stupider I have totally forgot which pipe goes where and I am not at home at the moment, what I do know though is the one that goes to the left (which is the back of the airing cupboard) ends up also in the floor and is red hot.

    Is there anything else that the boiler should be feeding?

    Thanks and apologies for the vagueness, if I need to I will take some more pictures later.

  2. gmartine

    gmartine GSR

    Cut your post by 2/3, we are only simple folk.
    • Funny Funny x 1
  3. Anthony7193

    Anthony7193 New Member

    Not sure what I should remove, no idea if the background is important.
  4. Gasmk1

    Gasmk1 GSR

    a better picture would help that weird looking thing is called an air separator. or airjec[​IMG]
  5. Anthony7193

    Anthony7193 New Member

    Thats perfect, thanks, so from what I am reading that is entirely to do with the feed and therefore not going to be the magic answer to my attempt to locate the heating return valve somewhere other than buried under the floor!

    Thanks again though, much appreciated.
  6. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Can you place right above the boiler ?
  7. steadyon

    steadyon Active Member

    1. The hot water connection SHOULD be the last one on the return circuit before the boiler. However, it might no be.
    2. With the system cold, turn your system on. Feel both 22mm pipes going in to the top of your boiler. The one which gets hot first is the flow, the other is the return to the boiler. Insertion into the return at this point guarantees the Magnaclean is in the right place. If necessary and possible, consider diverting the return in a small loop to the side of the boiler and insert the Magnaclean in that loop. Best not to try this if you have a lot of radiators, as it might restrict the flow more than the system will take.
    • Like Like x 1
    • Agree Agree x 1
  8. Anthony7193

    Anthony7193 New Member

    Unfortunately not there is literally an inch of pipe before it goes into the wall.
  9. Anthony7193

    Anthony7193 New Member

    Hard to describe why but don't think it is in my case as I can see the pipe clearly coming out of the cylinder and running into the floor with no connections to that pipe at any point (other than my weird 15mm join) so can only assume that it joins this pipe somewhere under the floor.

    The boiler is in the utility room and not really in a good place to change the pipe if I can avoid it, would mean ripping out a fair amount of the plasterboard etc.

    I have ordered a boroscope type camera so will try and see what happens with the H/W return when it arrives tomorrow, if not then I guess my best bet is to take a few pieces of floor up that run between the area above the boiler and the airing cupboard, can only assume that is where it would join.

    Thanks for the reply though all of you have been really helpful.
  10. Ric2013

    Ric2013 Plumber

    If you're going to spend money on tools, why not just get a professional in? And I don't say this often.
    • Agree Agree x 1
  11. Anthony7193

    Anthony7193 New Member

    The camera is only £19, If I can find the common return pipe then I can fit the filter, seems pointless paying a plumber to come and take up some floorboards when I can that myself, don't get me wrong if this was anything related to the boiler I would not touch it.

    If all else fails I will just wait until the boiler finally packs up and get it cleaned and filter added when I get them to move the boiler slightly.
  12. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Problem is you can't fit the filter under the floor :)
  13. Anthony7193

    Anthony7193 New Member

    I am working blind at the moment but am thinking if the join is not too far away I could move it back into the airing cupboard, if not then maybe build some kind of access hatch, if my guess is correct it will be right inside of the built in wardrobe so aesthetics are not an issue.
  14. Ric2013

    Ric2013 Plumber

    . . . and you'll have lots of fun with the boroscope.

    Well, if the pump and three port valve is inside the cupboard, then one can hope that the point at which the CH and the DHW returns meet is unlikely to be far away. I suppose if you want to bring the combined returns up through the floor and then return down through the Magnaclean, then that may work. It is, in fact, what I had to do in my own house for similar reasons to yours. With any luck you can get that in the airing cupboard.
  15. SimonG

    SimonG Trusted Plumber

    I'd be adapting pipework and fitting by the boiler. But then it's rumoured I know what I'm doing.

    To be fair this type of job could be a piece of cake or an absolute nightmare. Even for a pro.

    From your posts I think you may struggle. No fun if you screw it up, flood the house, airlock the pipework etc.

    Cheaper and easier to get a pro now rather than if it goes breasts up.

    • Funny Funny x 2
    • Like Like x 1
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