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lockshield

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  1. E

    Lockshield replacement advice

    I'm redecorating the front room and have found one of the radiator trv leaking when adjusted, so I have decided to replace the trvs on all three radiators given there age, should I replace the lock shields also?
  2. E

    Lockshield valve removing cap

    Bathroom towel rail with straight lockshield valves as in picture. Can't remove the top to tighten gland nut as it is leaking. Must be possible to remove but I can't and don't want to force it off.
  3. S

    Danfoss Lockshield valves leak after adjusting

    Heating system is 14 years old. On inspection I find that every lockshield valve is fully open. After adjusting some, I find that they weep slightly from the adjustment screw - valve type is as in attached picture, with only the adjustment screw behind the cap. Leak sealant is in the system - do...
  4. P

    Brass "Faringdon" lockshield valves leaking

    I have just tried to balance my heating system (16 cast iron rads, 3 towel rails), all the lockshields were fully open. When I try to close them down, they all leak, from a dribble to a gush. When I say all, I tried 6 and then stopped. The system was installed 9 years ago. Despite extensive...
  5. C

    Lockshield valve working

    New radiator . Not heating up as oh think it should , not very hot and has been bled. Under the lockshield cap of a new Milano Windsor thermostatic valve set , hole with hexagonal gap . Turning the cap screwing anti-clockwise doesn’t seem to catch or do anything . Old radiators had a knob I...
  6. T

    Replacing Danfoss lockshield valve

    Replacing a rusty radiator (installed 2000) the brass head of the Danfoss lockshield sheared off as it reached fully closed. I assumed that it was a 10mm with a 1/2" BSP connection to radiator. Offering up the nut (18.6mm across the flats) on the old 10mm insulated microbore it was found to have...
    • Tom Gebbie
    • Thread
    • america danfoss lockshield replacing usa valve
    • Replies: 1
    • Forum: USA
  7. Radian

    How much torque dare I apply to this lockshield?

    I've bounced off of doing this job for too long now. A towel radiator tail needs re-doing as suggested by the crusty white deposit all around it: But I can't get the lockshield to turn to isolate the radiator for draining. The amount of torque I'm applying with the adjustable seems like it's...
  8. Bogart

    Straight lockshield

    I intend using this manual valve as a lockshield. Its design differs from other straight valves in that it has a sloping bit of metal work on the body whereas others do not. Is it there for a reason?
  9. B

    scalding hot new Danfoss c-2 TRV cold lockshield and new radiator only hot at top .

    I have recently replaced all fourteen Stelrad radiators eight singles four doubles and two chrome towel radiators on small bore 10 mm piping in my four bedroom detached house.The Grundfoss pump is ten years old and sounds good .no bearing rumble.The Ideal classic ff 350 boiler is twenty years...
    • big john hog
    • Thread
    • america cold danfoss hot lockshield new new radiator radiator top trv usa
    • Replies: 32
    • Forum: USA
  10. P

    Removing lockshield extension tail

    Hi, I have a standard radiator (1/2" female bsp) on which I'm installing a new lockshield/TRV kit. The lockshield is similar to this: What happens if I remove the nut and everything on its left in the pic, and screw the valve directly into the radiator (with PTFE)? This would simplify my space...
    • phloaw
    • Thread
    • america compression joint extension lockshield radiator advice radiator valves removing tail usa
    • Replies: 7
    • Forum: USA
  11. S

    How do I turn this type of lockshield valve?

    Unscrewed the cap of the lockshield valve on my radiator, this is what I found underneath: I haven't been able to find any examples of lockshield valves like this on the internet, and I have no idea how I would go about turning it. Can anyone help?
  12. T

    Help with weird old rad valve please!

    Hi all, First post and DIY'er, please be kind! Just moved into a property which needs some work. Have a plasterer coming soon and need to get this rad off. Any ideas how on earth this valve works?! I've never seen one like it before. It's not moving with either a flat screwdriver or spanners...
    • TK10
    • Thread
    • america help lockshield old please rad rad valve usa valve weird
    • Replies: 2
    • Forum: USA
  13. milleniumaire

    Unusual radiator lockshield valve

    Hi guys, I'm sure this isn't unsual to you, but as 90% of the radiators in my home have 15mm valve fittings on both sides (flow and return) it is a little confusing for me. Around 15 years ago a couple of radiators were installed in a loft extension and I'm currently trying to unblock the pipes...
  14. A

    Does my system need h-piece and lockshield valves?

    Hello 2 storey building 3 apartments per floor Waterborne heating system description: Each apartment has separate heating distribution manifold cabinet. Manifold based distribution system where each panel is served by its own circuit. STAD valve in the second floor manifold cabinet for the...
  15. B

    How far open should lockshield valves be?

    I was told by a plumber that the lockshield valve on my radiators should be 'just cracked open slightly', from my understanding you dont want the LS valve open too much as the water will flow through the radiator too quickly and not heat it up fully is this correct? I took this plumbers advice...
  16. I

    Lockshield valve bigger than tail on new rad

    Total amateur giving it a go .. We are trying to replace our radiator and came up against an issue. The tail piece in the original rad is jammed in and won't budge. We have bought new rad with a 15mm tail however it seems the pipe into the lockshield valve is 3/4 inch. Does such a thing exist...
  17. M

    radiator only getting warm

    Hi, I have gas central heating with a conventional boiler with a cold water tank and a hot water storage cylinder. One of my radiators towards the end of the run used to get hot and I would then control the temperature with the TRV valve. Someone has turned the lock shield valve on the...
  18. @

    Should I try to adjust the lockshield valve of a radiator with a TRV?

    When British Gas installed my new boiler, they also put TRVs and new lockshield valves on the radiators in the bedrooms of my house. I’ve not been very happy with the performance of one of the radiators since then. Even when the TRV is on its highest setting, the radiator does not get very...
  19. B

    Danfoss drain off lockshield

    So I'm trying to drain down the central heating system to change a valve out. Problem is the drain off valve is seized. Tried using a bleed key/radiator key but it isn't moving, now I don't want to round it. The valve I'm talking about is the one below. Now I know my options are to isolate...
  20. T

    Lockshield - no stem

    I am obviously missing something, this one radiator in our house has a lockshield with what appears to be no valve stem. Looks like a hexnut female. But I'm not sure. Can anyone tell me what I'm missing, this has to be standard, and I must need a key or something. Any advice appreciated...
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