I have one ditch dug and one more to go for the 4" drain pipes under the slab. I have more trim digging to do depending on what the distance should be between the top of the horizontal 4" drain and the bottom of the slab. My plan is to dig the ditch deep enough to put a thin layer of sand in the ditch for the pipe to lay on and then cover the pipe in more sand and small river rock (pee gravel)...Im shooting for a 3" space between the top of the drain pipe and where the bottom of the slab will sit. Does this sound like enough space ?
Thanks
Thanks