I have just constructed an outbuilding and now require water and electrics to flow from my cellar to my outbuilding which is approximately 3 feet away. i plan to bury the pipes underground, the electrics going through plastic 15mm pipe and water being carried through copper pipe.
i have searched on this group and understand to stop the copper pipe rusting or becoming weathered etc as it will be buried underground i need to coat it with denso tape.
if the copper pipe is 15mm, what size drill bit will i need to ensure the denso coated pipe will fit through the drilled holes in my celler and through the concrete block of my outbuilding. Also how much denso tape do i need to apply, just 1 layer or several?
Many thanks in advance.