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I'm planning to build a 10x8 shed that will house the pipework and electrical equipment for a new well I recently had drilled. I would like the shed to sit on a concrete slab just for the quality of life it provides. My well contractor suggested that I pour the slab first, leaving 1x1 holes roughly 1' in from the corners where I can run pipework through afterwards.

  • Once the slab is finished with the holes, does it compromise the integrity of slab if I were to dig out the dirt between the hole and the edge of the slab to run the pipes?
  • How best to fill/pack dirt back in after the pipes are put in place? Should I fill the holes with concrete, or just pack in gravel to be flush with the surface of the slab?

Rough drawing of what it'll be like: enter image description here

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  • Run rope through the pipes befire burying and concreting. – Solar Mike Jun 1 at 5:51
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You could use large Schedule 40 PVC as conduit for the pipes. You'd use large radius bends. Will the pipes be PEX or copper? I think soft copper could be fed through a large radius bend and I am sure PEX could be. This would make replacing piping much easier if you ever needed to replace the piping under the slab.

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  • The pipe is going to be poly pipe, so it should be very easy to work with. There will also be an electrical conduit going to the wellhead. I suppose that doesn't need to be in the slab; it can run down the side of the building. – atanamir May 31 at 23:55
  • Could you be more specific in your term "poly" pipe? – Jim Stewart Jun 1 at 1:54
  • How large conduit are you thinking? 2" or bigger? – JPhi1618 Jun 1 at 3:13
  • 250PSI rated polyethylene 1-1/4" CTS pipe – atanamir Jun 1 at 3:25
  • I am not familiar with the bending properties of 1-1/4" CTS pipe. I suppose normally it goes more or less straight from a water main to a meter in a box or can in the ground and is direct burial. Using PVC as a conduit might not be feasible. – Jim Stewart Jun 1 at 10:17

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