installing a shower pump

[dadthesplunge]

I am installing a shower pump (twin impellor) to an independant mixer shower over the bath. Water pressure is low but there is a good supply of cold water in loft and hot water tank is in the airing cupboard next to the bath itself. Do I need to empty the hot water tank before tapping into the hot supply as I don't want a flood, or can I just turn of the feeder supply to the tank (which stops the hot water running throughout the bungalow quite quickly). also what sort of cutting tool is best for the 22mm pipe as the working space is very tight
many thanks for any suggestions

 

[kevplumb]

1 yes you can turn off the feed you will still get a small amount of water when you cut the pipe (put a towel under it)
2 monument pipeslice

 

[kevplumb]

you will need to drain the tank to cut the cold feed in

 

[dadthesplunge]

many thanks for your advice
cheers