Sorry, maybe a stupid question, but here goes anyway...
I am looking to buy one of these:
However, I cannot see where the valve of the lockshield is... I can see the housing in the photo, but is the valve usually included separately in the pack, and assembled on the job (and for some reason omitted from the photo(s))?
There appear to be two elbows, one for each end of the radiator.
The one without the TRV on should be the lockshield, I assume.
Cheers
Dave R
My assumption as well, but where is the valve?
Under the hexagonal cover
They are sometimes identical valves for both sides. The thermostatic bit on one, and a screw on cover for the other. You set the maximum flow by adjusting the screw on cover.
I have a Drayton set like that. A second cover allows you to lock both valves off (after removing the thermostatic head) to remove the rad.
What you see *is* the valve! See
Thanks - never seen one of these before - I am used to the ones that you can adjust by turning it by hand.
According to the instructions: "Adjustment of the lockshield for regulation and isolation is by means of a 6mm Allen key socket in the valve body which is normally covered and protected by a screw-on brass cap."
One of the reviews: "...The 'chinzy' lockshield with the ?hidden? allen key valve looks a lot nicer than the white plastic knob of other valves. However, this might not suit you if a disaster ensues and in a rush you have to find the correct allen key!"
The hexagon cover is unscrewed and the valve is adjusted with a screwdriver.
But the whole point is that you *don't* adjust a lockshield by hand - otherwise every Tom, Dick and Mary will be turning them on and off. You turn them with a spanner when balancing the system - and then leave them alone, fitting a plain cover which doesn't operate the valve.
[If not using TRVs, you may have an identical manual valve at the other end of the radiator except that's it fitted with a knob which *does* connect with the valve spindle, allowing it to be turned on and off by hand.]HomeOwnersHub website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.