Speedfit pipe sizes for bathrooms

[turtlesnuts]

good evening,

i'm moving my sink to a different wall. i've bought 15mm speedfit layflat for my basin taps, it's quite expensive and i'm not going to use the majority of it. the more i research, the more confidence i get that i may be able to take out the electric shower and put in a mixer tap.

am i better off returning the 15mm and going for 22mm speedfit to connect the basin and shower supply's together or would 15 do both? i can't think of a situation where someone's going to be using sink and shower at the same time.

the cold tap is off mains and the hots off a new combi boiler that i oversized in case i was ever able to put in a mixer.

the mixer valve has 1/2 inch fittings and speedyfit only do 15mm with 1/2 inch and 22mm with 3/4 inch. so if i went for 22mm ild have to reduce down to fit into the valves anyway.

thank you for reading

 

[SimonG]

Wasting your time with 22mm pipework for hot water off of a combi.

 

[WC1]

Might be best getting a spark in to disconnect and remove the cable feeding the elec shower once it's out. Could spoil someone's day if it got accidentally switched on by mistake in future. I have seen the cable switched off at the iso and just tiled over...
Good luck.

 

[Murdoch]

Might be best getting a spark in to disconnect and remove the cable feeding the elec shower once it's out. Could spoil someone's day if it got accidentally switched on by mistake in future. I have seen the cable switched off at the iso and just tiled over...
Good luck.

hit,nail and head spring to mind.

very common in kitchen refits, taking off tiles and finding taped up live cables in back boxes ...