Water Pipe to Garage help

[Mattatooi]

Previous owner had washing machine at one point in garage. Waterpipe was removed from house to garage. However drainage and electrics still all there.

Currently outside tap is at back side of house. There is an end cap where the original pipe ran;



I want to use plastic pipe instead of copper to run to garage. It is just cold water feed. I have not done any real plumbing before, and I am not sure how you join plastic pipe to this copper pipe.

Also, what size of pipe would you recommend?

And. finally one other question. I have gas combi heating system. If I turn off stop cock, will that mean I need to do something with my boiler or does this have no effect on that?

Thanks

 

[oldbuffer]

If you run the new pipe in plastic, there are those who would say you still haven't done any real plumbing!

More positively:

a. Old pipe looks like 15mm copper. To join to plastic, assuming 15mm plastic, remove end cap, then either:
i) Remove olive and nut then use push fit straight coupler. OR
ii) Leave olive and use compression straight coupler, remembering insert in plastic pipe.
b. I'd use 15mm pipe throughout.

You do need to think about providing a drain off valve at the lowest point so that water can be drained to prevent pipe freezing and bursting. If the pipe ends in a tap, then there should be a double check valve fitted inside the house, with a means of isolation, to comply with water regulations.

 

[Mattatooi]

Pipe will be for washing machine only. No tap going into garage. Putting Isolation valve at washing machine end. I am unable to currently source where the outside pipes come from (out via wall) in the house. There appears to be pipes running down wall in kitchen that have been boxed in that then head to sink and existing washine machine. So far unable to find any type of iso valve for this outside tap that is currently there from previous owner.

Just the other question regarding my heating system. What should I be doing? Do I turn it off, close stop cock, run water out of taps, do pipework join, turn stop cock back on run water, turn boiler back on?

Thanks for speedy reply!

 

[Mattatooi]

Also I should note, main reason using plastic, is less chance of freezing and as I have zero plumbing experience, thinking plastic pipes be easier!

 

[denso13]

less chance of freezing

Same chance of freezing, maybe slightly less chance of bursting. You can leave the boiler alone, it won't do any harm.

 

[Plumb101]

Don't forget to lag all external pipe with a high quality lagging. Good luck