New connections

[DaveH]

I have 2 new water connections going in before Christmas - a 25mm house supply and an unmetered 32mm firefighting supply for a sprinkler system. I want to tee off the house supply to send water to the detached garage too (obviously the tee will be inside the house and not underground). The pipes will be laid without ducting but could I send 2 or 3 pipes together through a short duct into the property or will I struggle once the pipes are lagged? Would they be better in individual ducts? Once inside the property can I tee and then add a stopvalve or is that asking for trouble? There will be a separate stopvalve in the garage and obviously one externally in the meter chamber. There will be drain off points by the main house stopvalve and garage stopvalve but do I need anything else? Check valve / non return valve?

 

Thanks

[Temp]

I'd just stick in another duct.

 

I'd have three valves. One on each of the incoming and one on the outgoing to the garage.