Hi, I have to dig a trench for a water supply pipe. My plumber said 900mm deep, but how wide do I need to make it? Thanks
Wide enough to work in to dig trench if digging by hand, about 225mm -300mm minmum should be workable, mini digger would be 150mm.
As is a drainage spade, or a long handle trenching shovel only has 100mm wide blade, but I've never used one, to dig down to 900mm. If your connecting to your water company pipe, check what maximum size supply pipe is allowed, some will allow 32mm (recommended), others 25mm.