Water supply to garage. Isolation?

[pattison87]

Hello,
I have run a water pipe (25mm Mdpe) in a trench from house to garage. Connected up in garage using 25mm to 15mm stopcock. Going to use a JG reducer to connect in the property.
Just wondered if 1) this all sounds ok? 2) should I add an isolation valve where I am creating the connection in the property?

Thanks for any help.
Chris

 

[Madrab]

How deep is the trench? Ideally it should be at least 750mm deep. This is to help in avoiding the pipe from freezing in winter and any damage from above.
Depending on what it is being used for, backflow prevention should be added (checkvalve).
I'd add a means of isolation at the take off point in your house

 

[pattison87]

Yeah trench is atleast 750 so that is all good. That's great, I will put an isolation valve is property.
The supply is for a new sink in garage and outside tap on the wall of the garage. The outside tap I have got has a double check valve in it. Do i need to fit another aswell?