Warwick XL Shower Riser Rail

The adjuster handle that allows the shower head to be raised/tilted has sheared off, does anybody know how the feet of the riser rail are attached to the bulkhead so I can swap it out for a replacement.

I have this riser attachment fitted to the towel rail in our Stanway as the shower head was too far back in the corner. If you can move the broken one down the rail and add this one, it should do the job. I also added a trigger spray head.
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Big thank you, what a superb solution, for info should anyone else need one, the riser rail has an 18mm diameter.  I carefully cut the old one off with a junior hacksaw.  I also ordered a trigger spray head as this is likely to save water. 

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I had a look in our van and the way in looks too be behind a mirror which would need removing

Hi, on the Warwick XL the shower riser rail is attached to the rear bulkhead which is the left hand side or the wardrobe, I took a good look and there are no screws or bolts, I'm reaching the conclusion that it must be glued on.  I have a solution anyway thanks to Robstopaz. Thanks for looking all the same.

The top and bottom of the riser rail has a small cap which can be prized off, it holds the rail and its chrome cover to the wall and is a push in fit like a plug. Even though the wall brackets inside are fixed securely to the wall the rail will always have a little give and twist when moved because the plugs have a little play in them. Nothing to be concerned about and not detrimental to use. Provided the wall brackets have a little silicone on them when fixed there will be no leaks.

Hi Ian, that's what I expected to find, I have just had another inspection and there definitely are no caps fitted, I guess they have changed the rail for a cheaper stick on job for a 2020 XL.