Need to know everything about tap tails...

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I will need to change shower bath mixer tap and kitchen mixer tap. Both connect to 15 mm pipes. I have bought the shower mixer already but not the kitchen tap. The connection to the shower mixer seems very large and has threads. I could post a link t o the product (on ebay) if I'm allowed but it's a very typical and cheap mixer.

So my first question is:
Will I need the same size of flexible tap tails for both kitchen and shower mixers? If not, what is the typical size of tap tails for shower mixers?

Second question.
I have a conventional radiator very close to a vertical pipe from the ceiling that feeds it. The radiator valve needs a pipe that goes vertically into it and comes from the bottom. I hope you get the picture. So essentially, the pipe from the ceiling needs to do a 180 deg turn to fit the radiator valve. Normally, you'd do that with 2 elbows but the pipe and radiator are very close to each other and there's not much space to put 2 elbows there.

So I was thinking of putting a flexible pipe. I asked the guy at the plumbing shop then but he told me the temperature of the water in the central heating system is too high for the rubber in the flexible pipe. Then this morning I realised tap tails also carry hot water so I could use that to connect to my radiators.

What do you guys think? Is this appropriate?

Any additional info and experience on tap tails will be appreciated.
 
Tap tails max 60°C... central heating could be up to 80°C. Flexible couples would look awful. Do it properly with copper pipe.
 
I doubt copper pipes would bent by 180 degrees. The correct way to do this would be to move the radiator further to the side to give more space for the pipes and fitting.
 
No space for any fittings.

What my first question: would I need a bigger tap tail for the bathroom?
 
Let's try this:


ebay.co.uk/itm/281847931191?euid=9abb78ca7a234ffbb5740dd7940acd36&cp=1

Just remove extra space
 
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Twist the valve upside down and drop the pipe straight into it:LOL:, it will still work even if it looks sh*t, and won't look as sh*t as a flexy.
But seriously most radiators will slide along a bit on the brackets, can you not do that? Even if it means altering the pipework on the other side a little.
 
I'm struggling to come up with one possible configuration on wall/pipe /radiator /valve /corner where a Flexi is going to be better /more compact /reliable /tidy /professional looking


Nope. Can't think of any. Not to mention finding one that can take the heat /chamfer /bend radius etc.
 
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