I am about to refit a bathroom and the two 3/4" pipes to the bath each have an earth wire attached. I am going to convert to 22mm and use a push fit flexible hose for ease as time is short. Are there any issues with the earthing, as the push fit looks to be plastic and will prevent the braid from earthing the taps. Do I have to run another earth wire to the "other" side of the flexible hose (300mm)?
TIA John
No.
Just refit or replace the earth clamps to the new 22mm pipes. There is no need to cross the flexihose with an earth wire if the hose is the final connection to the tap.
Adam
The best solution is to run plastic for a metre (or more), if you can cut back the copper further and use plastic pipework. Then remove all supplementary bonding from the bath (if metal) or taps themselves. This is safer than running with copper and supplementary bonding.
Christian.
300mm (a foot or so) is not generally regarded as being enough of a break to completely isolate one side from the other due to the water inside the pipework. As Christian suggests, the best thing would be to use a meter or more of plastic which is likely to be enough.
Be careful though; if this is a metal bath (pressed steel or cast iron for example) then you may get stray earthing through non-indended paths such as the metal pipework touching a leg, or the bath being fixed to structural metalwork in the building. Under these circumstances (i.e. where you are not able to guarantee that the bath is completely isolated from anything "earthy", then supplementary bonding is the only option, and yes, I'd jumper the plastic sections. Don't forget the wire to the bath itself as the earth through the taps (and plastic washers / enamel etc.) may not be up to much.
Hwyl!
M.
Agreed, but we are (I hope) talking about flexible push fit tap connectors for the final connection from copper pipework to the taps. If the pipes supplying the plastic/flexible hose are bonded then you can ignore the jumping of the hose with an earth lead to the taps. If it is a metal bath then this would of course also need to be bonded to the pipes.
Yes. A metal bath should be bonded to the new 22mm supply pipes (unless as said earlier it is supplied by plastic pipes longer than 1 metre)
Under these circumstances (i.e.
How do you bond a tap on a bath? There is no room to get anything other than a 22mm basin wrench into the small void.
Adam
I'm not sure you can imply this from the OP. FWIW, my initial mental picture was of the OP leaving the existing taps with a short tail of
3/4" and then using a flexi to connect to the new 22mm incoming. Under these circumstances I'd suggest it is both possible and debateably desirable to jumper a short length of plastic.And of course under most circumstances it's nigh on impossible to bond that close to the tap anyway, as you say later :-)
Interesting question that then... it is entirely possible, under circumstances where the final connection to the tap is a short length of plastic, for the tap to be "earthy" via the conduction of the water, but not part of the supplementary bonding due to a: impossibility of attaching an earth to the tap and b: plastic washers and so on isolating it from the bonded body of a metal bath.
Hmmm... Even if the bath were plastic/GRP etc. it wouldn't work unless the plastic section of pipe was, as suggested, some 1m or so.
Hwyl!
M.
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