Which flexi hose for new bath taps?

[Harvest Fields]

I have never seen a full bore flexi mate. Think he meant a full bore leaver isolation valve.

 

[fixitflav]

Hi brendanxx
I was only referring to SS sinks , which aren't very rigid. In any case, it's not a show-stopper, just doesn't feel as good in use.
In your case, are the existing taps rigid-piped? If so you presumably need to cut the pipes to insert flexis. Need to get the right fittings to connect the flexis - compression, pushfit etc. I would take your new taps to the shop and ensure the flexi fits the connector and the other end fits the taps.
I recently changed sink taps for one of my sons. New and old both had flexis, I hoped to re-use the old flexis as it made life easier at the pipe end, but the tap threads were different and I had to change the pipe fittings.

Another thing - you said inlet pipe is 21mm. I would measure it carefully, if it's an old system it might be 3/4", which is about 21.5mm OD if I remember right. Affects which fitting you need.

 

[Welder]

Just my two penneth.

Firstly, there are currently NO full bore flexis. NONE.
The 13mm referred to is the internal bore of the rubber hose but DOES NOT take account of the 8mm max internal bore of the very restrictive ends.
Hoses deteriorate for many reasons but WRAS approval makes ZERO difference to their life. WRAS approval does not determine fitness for purpose nor longevity. It simply assesses likelihood of contamination of the water supply from the materials used - end of.
Shaun's advice is simply the best.
Hard pipe (plastic is better than flexis) for longevity and reliability along with good quality valves to isolate.

 

[Ric2013]

While I would agree with the above, in practice, though, I wonder how great an effect on flow a flexi would have, and how much it matters? The taps themselves normally have a point where the bore is greatly restricted, and how often is a tap opened fully because we actually need the full flow rate?
That said, on a bath, we do tend to open taps fully, because we want the bath to fill quickly, but depends how much slower we are talking.
I've never carried out a direct comparison between the same tap on the same pipe with and without a flexi, but could be an interesting experiment...

 

[Deleted member 96738]

Thanks a lot, lads, all very helpful and hopeful! I've now with some very loud swearing and battered hands (spanners slipping, stanley knife slipping while cutting off the 1" thick sealant gunk the previous idiot had smothered everywhere!) installed the nice new glittering taps. Couldn't have done it without your fine community! Cheers

 

[Ric2013]

Did you make up any good new swearwords? I didn't quite manage when I moved into my new house and decided to remove the taps and reinstall them so they didn't spin, but I got close!

 

[Deleted member 96738]

It was all a bit hectic, during my efforts at DIY my wife prefers to go and visit friends. All quiet now - until the next little job - my speciality is putting up shelves that aren't quite straight.