Sand, washed stone and select fill: what goes around a pipe, what goes above it and why the wrong choice leads to sinking and breaks.
What surrounds a pipe matters nearly as much as the pipe itself. Even support under and beside the pipe spreads loads. Rocks in the fill point-load it and cause cracks. Wet clay never compacts and a trench full of it sinks for years.
Bedding is the first layer: clean sand or fine washed stone under and around the pipe. Above it goes backfill in compacted layers, using the soil from the trench if it is good or imported material if it is not. The top layer is finished to match the surface: topsoil for lawns, base stone for pavement.
Clean sand or fine stone.
Compacted layer by layer.
Fill must be near optimum moisture.
Plates, jumping jacks or rollers.
No sharp stones on the pipe.
Topsoil or base to suit.
French DrainsFrench drains, swales and downspout lines that move water away from foundations, patios and soggy lawns.Explore 
Culvert InstallationCulverts under driveways and roads that pass water safely, sized and set with headwalls and stone so crossings…Explore 
Utility TrenchingStraight, clean trenches for water, sewer, electric, gas and communication lines, cut to depth and width by machines…Explore 
Rock TrenchingCutting trenches through limestone and hard rock where a standard excavator bucket gives up, common across Middle Tennessee.Explore 
Excavation and BackfillDigging, bedding and backfilling done in layers with proper compaction, so the ground does not sink after the…Explore 
Stormwater DetentionDetention basins, outlet structures and inlets that hold back runoff from new development and release it at a…Explore 
Surface RestorationSod, seed, topsoil, concrete and asphalt patching so your yard and driveway look good again after the trench…Explore Size a trench, plan a pipe slope or ballpark the cost.
Trench Volume and Spoil CalculatorEnter trench length, width and depth and see cubic yards of soil, truckloads and bedding stone to plan for.Try it 
Pipe Slope and Fall CalculatorEnter run length and slope and see the total fall and the invert elevation at the far end.Try it 
Underground Utility Cost EstimatorPick a project and a size and get a ballpark planning range.Try it Sometimes. Clean soil without large rocks or too much clay can be used above the bedding.
Washed stone has no fine dust, so water drains through it freely.
A layer of backfill placed and compacted before the next layer goes on.
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Material guideHDPE PipeFlexible black polyethylene pipe for bores, pipe bursting, force mains and water lines, joined by heat fusion into…Learn more 
Material guideCopper Service LinesCopper tubing for water services: why it is still widely used, how it is joined and where it…Learn more Quick scheduling, careful work and a clear price before we start.
