Err... I took a couple of pics, uploaded them to my profile and expected to see them in the post...
How can I show them?
Under the editing window while typing, you'll see a blue link that says "Show My Images", if you click it you'll see a drop down menu of your albums and a row of images for the selected album - just click on an image and the code will be added to the text box.
Or above the images in the image viewer, there are two boxes containing the code that you can copy and paste to get the image inline like this :
and this
And if you struggle to see what your posting will look like, you can click on Preview and you'll see a preview of what you've entered so far, with an editing box below it. Don't forget that you won't have put the posting on the board at this point - you still need to click Submit for that to happen.
As to your question, if you could find a rail wide enough, then you'd remove the two valves (would need at least a partial system drain down) and replace them with straight valves that would go directly into the bottom of the rail. But as CBF has suggested you won't find one wide enough, then that's out.
Looking at things, it'll make a mess to start pulling the floor up - which as suggested would be the correct way to do it. So I can see a few ways of doing it, which if done by a skilled plumber might not look too bad.
1) Form the pipes to an off set ("swan neck" bend) - for a 900mm wide rail you'd be looking at something like a 50-60mm offset each side. Since I don't think it'll be possible* to do that in 15mm in-situ, it would probably mean shortening the pipes and using an inline joint to fit a new piece that's been bent in the bender. The joint can be reasonably inconspicuous if done neatly with endfeed fittings of by swaging the end of one pipe to form a socket.
* I wouldn't try, but no doubt someone will tut and say it's easy if you know how to work pipe and have the right tools.
2) If that won't work, take one pipe straight into the rail, and offset the other with two elbows. It will be obvious that it's not been done "right", but could be neat enough if done skillfully.
3) Fit an elbow on the top of each pipe, a short length of pipe, and angled valves with the stems horizontal underneath the rail. Ie, using the same valves, turn them through 90˚ so the pipe entries are horizontal, and the rad connections are vertical.
It would look "odd" to say the least !
Doing soldering on those pipes without damaging the wall, floor, or sealant will need care.
Just for reference, rad and towel rails normally have 1/2" BSP tapped holes - and you fit your choice of valves. Unless you buy a "package", then normally the valves don't come with either. Radiators usually have connections on the sides and use angled valves, towel rails normally have the connections on the bottom and can use straight valves to connect to vertical pipes.
