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I posted earlier , i thought it was a shower valve , but now i realise i have no hot water at the bath and sink taps . When i turn off the shower mixer valve there is a smallish bang like air trapped could this be the problem if so how do i bleed the system or is it something else pcb etc ??

Is it possible to repair the valve once removed ??

Is it possible to get a replacement thermostatic shower valve as my shower has no hot water its fed from a combi boiler and their is hot water at the sink and bath , i do not know the make of it , thanks.

The plastic conduit is on the surface of a wall , thanks

what is the best product or chemicals for cleaning oven rings , alluminium rings etc on a gas hob.

I thought anything outside the house that is electrical ie cable should be protected by a rccd , what if the garage supply cable whic is a 6.00mm twin & earth protected by plastic conduit was damaged and it was'nt protected by a rcc back at the house.

Sorry , i was thinking about a garage supply cable at the time as i was trying to make the relation with outdoor circuits ie the sockets could be used outside. So could i use a single pole rcbo to protect my garage supply cable or does it have to be a double pole rcbo ??

So still confused -i am thinking it has to be a double pole rcbo to protect the garage supply cable as with sockets in the house the rcd will switch off both the live and neutral at the same time .

spark 123 , I assume you meant if it was a single pole rcbo at the consumer unit - i still thought it had to be double pole to satisfy the 17th ??

Thanks for your reply RF the cross polarity makes perfect sense !!

I am trying to understand what difference does it make if you only cut the live conductor (if you used a single pole rcbo) as the live would be dead in the event of a earth fault and the danger should be gone . Why is it any safer if the neutral is cut as well ???

I assume that you have to fit a double pole rcbo at the consumer unit to protect your sockets as they may be used outside in the garden , ie in the event of a fault both the live and neutral are isolated , would you be allowed to fit a single pole rcbo for sockets ??

I thought thats what i said or are you implying that the rccd would take to longer to trip

If i ran an earth wire from the metal bath to the MET at the consumer unit would this be wrong because the bath would still be earthed and a fault current would still flow down this route , so tripping the rccd

Is supplementary bonding =cross bonding hot and cold pipes to the bath. And is equipotential bonding=bringing metalwork to the same potential as the room ie , connecting a metal fitting with built in mirror and lights in a bathroom and connecting it to your shower circuit and light circuit...

Many thanks i will try tomorrow for a pic if i get time as i am working nights !!!!

i will try and get a pic later i am at work at the moment but it takes up 2 ways in the board, thanks

Thanks for your reply any views on the other query i had where the electric board replaced my dads 32A breaker for a rcd is this correct as now he has no over current protection or am i missng something ??

yes the consumer has a double pole switch on the main switch , but my question was can i use a rcbo for both types of protection if i install it in the house consumer unit as its a single pole ( I suppose it must be ok as you can use them for downstair sockets )

Sorry the garage is detatched.