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A fitting or adapter is used in pipe systems to connect straight sections of pipe or tube, adapt to different sizes or shapes, and for other purposes such as regulating (or measuring) fluid flow. These fittings are used in plumbing to manipulate the conveyance of water, gas, or liquid waste in domestic or commercial environments, within a system of pipes or tubes.
Fittings (especially uncommon types) require money, time, materials, and tools to install, and are an important part of piping and plumbing systems. Valves are technically fittings, but are usually discussed separately.

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  1. A

    What fittings are these?

    I'm in the process of converting my garage. I've been looking for the existing radiator feeds. I came across these. Are they reducers? Don't know why they would be insulated?
  2. Muskopia

    Chasing CH pipes using speedfit

    I'm chasing some walls and using speedfit for pipes to the radiators. I'll be using conduit and want to transition to copper ends which will connect to the rads. Can I bury the speedfit fittings (elbows etc)? What are the options for pipe exiting the wall and connecting to the rads? Do I...
  3. B

    Fittings for drinking water

    Hi Have a little job under kitchen sink and need to know how to identify fittings (valve, tee, coupler) suitable for drinking water. Should I be looking for only EN-1254-1 or EN 1254-2 or something else? For example, is this one good for drinking water...
  4. R

    M-Press fittings experience

    Looking at replacing a stainless steel welded 90 metre water system in press fit. Its going to cost about £18k in Mapress but I have seen M-Press are alot cheaper on their fittings. Has anyone got any experience with M-press 89mm fittings. Just wondering if they are cheap for a reason.
  5. A

    Grey Hep2O Fittings Unscrewing!

    I've searched this forum but cannot see anyone else reporting a similar problem with the last generation grey Hep2O fittings: they unscrew! Our whole house was re-plumbed in 1999/2000 and Hep2O fittings were used throughout for all out-of-sight fittings - just over 200 of them. One evening...
  6. S

    Where to obtain Marley plumbing fittings

    I've recently cleared a fatberg from the drain pipe underfloor and am now in the process of fitting everything back together. The cropped out pipework is easy enough; a couple of Flexseal PF56 couplings which are just the right size for the 56mm OD pipe. The boiler condensate drain I will...
  7. J

    Plastic push fittings on oil boiler?

    Was at a house today and their new oil boiler was installed in a pretty shoddy fashion. Aka Plastic tiger loop screwed to the boiler casing. And the main thing was really untidy pipework. Thrown together with a pile of grey plastic push fittings and copper / plastic pipe mix. For example...
  8. Achille Becker

    Plumbing for rocket engine,

    Hello all our university is doing a project to build a rocket engine, we would need somewhere where we could learn how to choose the fittings, valves, fuel lines, and what attributes each have. we will be using two propellant to feed the engine the first one is liquid oxygen which is a cyrogenic...
  9. D

    URGENT Shower riser bar leaking & unable to remove fittings.

    We have located a leak from a shower enclosure...culprit is the riser bar, as soon as water is hitting the bar it's coming through into our kitchen ceiling. Having difficulty getting the fittings off the wall too to investigate .
  10. B

    Hep2o fittings failing

    I see there are various previous threads on this and other sites which discuss Hep2o fittings, I use these fittings and have not had any issues with any that I have fitted, however I have become aware of a few recently which have failed, I know of a block of 45 flats ( 7 years old) where each...
  11. B

    Help finding pipe diameter fittings

    Hi Could someone help please. I live in an old house and I'm refurbishin the bathroom, the mains water connection is an odd size and need to convert to 15mm pipe. I have tried 22mm pipe too big and tried 20mm pipe too small, I have been reading up and I think it's 3/4 imperial pipe so about...
  12. M

    Zero Lead Brass Compression Fittings

    I understand that, at least in the USA, the term "Lead Free" means "not more than a weighted average of 0.25% lead when used with respect to the wetted surfaces of pipes, pipe lead-free compression fittings, plumbing fittings and fixtures." In other words, Lead Free does not necessary mean Zero...
  13. D

    Are support sleeves necessary for copper pipe compression fittings

    Hi, This must have been discussed in the past but with a quick search I couldn't find the answer I wanted. What is the view of using support sleeves inside copper pipes for compression joints. (The pipes in question are 28 mm and 35 mm diameter so I'd expect them to be pretty strong anyway.)...
  14. L

    Sewage pump pipe and fittings.

    Hi all, I have a sewage pump that I want to add hard pipe to to allow easy fitting and removal. The picture shows the fitting that is screwed into the pump, I need this fitting on the end of a 1.5m pipe at right angles to the pump. I have seen a heavy duty grey type pipe used for this but I...
  15. M

    Compression fittings

    Have noticed my success rate with compression fittings fall over the last year or so. Am getting a few that weep. When I back to nut off to have a look the olive isn't over tighthed and I always clean the pipe first. Wondering if anyone else has noticed this whether it's just me or the quality...
  16. S

    Replacing Kitchen Tap - what is the minimum insertion depth for push fittings?

    Evening all, Basically my question is how deep must a 15mm copper pipe be inserted into a push fitting for it to function properly without leaking? I Bought this Tap Tail Adapters from Toolstation this morning and I am wondering if they are deep enough. I tried to install a new mixer tap this...
  17. J

    Correct way to connect two compression fittings

    Apologies for the stupid question, I'm just a newbie playing under the sink. I have an isolation valve and an elbow, both of which have compression fittings that would normally fix to copper pipe. I need to connect both together directly. What is the correct fitting to do this? Surely I don't...
  18. M

    Polyfit pipe fittings?

    Hi guys. Do any of you know whether the grey poly plumb fitting and inserts can be used the white polyfit pipe? Can’t seem to find a local stockist of the older white polyfit fittings.
  19. M

    Parralell thread end feed fittings

    Morning all. Just about to install a crosswatwr shower valve and want to connect in the valve with end feed 22mm x 3/4 male. Manual says not to use tapered threads. Cannot find parallel out there that come with end feed. Any ideas Thanks
  20. B

    Replacing Shower Diverter Valve / 15mm to 1/2" BSP fittings

    Afternoon, all. Currently have proprietary diverter valve on shower riser with handheld outlet standard 1/2" BSP male and inlet also 1/2" BSP male. The outlet to overhead shower is custom female fitting and feeds a larger diameter chrome covered plastic pipe feeding large and inefficient...