Lockshield?

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.