Pipe Bedding - Material Guide
Picking the right gravel for a pipe bedding project? This guide covers the materials that fit best, how much you need, and what it costs delivered.
Picking the right material for pipe bedding starts with one question: is this surface going to carry traffic or carry water? Load-bearing jobs want fines that compact. Drainage jobs want clean stone with open voids. Below are the specs, install steps, depths, and regional prices we run on real pipe bedding jobs every week.
Best materials for pipe bedding
What pipe bedding needs in a material
- Size and shape: 3/8 inch washed stone or coarse mason sand.
- Drainage: high, supports pipe with even contact.
- Compaction: lifts of 6 inches on each side of pipe.
The three specs above drive every other choice on a pipe bedding job. Order the wrong size and the surface fails fast. Pick a material that drains the wrong way and you fight standing water or washouts. Get these right and the install steps below take care of the rest.
How to install pipe bedding
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1
Dig to the right depth
Trench to design grade, hand-grade the bottom for an even bed.
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2
Spread bedding stone
Place 4 to 6 inches of washed 3/8 inch stone or coarse sand.
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3
Lay the pipe
Set pipe on the bedding, line up joints, check fall with a level.
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4
Haunch and cover
Shovel stone under the haunches, then cap with 6 inches over the pipe.
How much pipe bedding material do you need
| Project size | 3 inch depth | 4 inch depth |
|---|---|---|
| 100 sq ft | 0.9 cu yd / 1.3 tons | 1.2 cu yd / 1.7 tons |
| 300 sq ft | 2.8 cu yd / 3.9 tons | 3.7 cu yd / 5.2 tons |
| 600 sq ft | 5.6 cu yd / 7.8 tons | 7.4 cu yd / 10.4 tons |
Quantities above assume crushed stone at roughly 1.4 tons per cubic yard. Pea gravel and river rock run a bit lighter, decomposed granite a bit denser. Add 10 percent waste for irregular shapes and edge losses.
What pipe bedding costs in 2026
| Region | Delivered per ton | Typical 300 sq ft project |
|---|---|---|
| Northeast | $44 to $76 | $154 to $266 |
| Midwest | $34 to $59 | $119 to $207 |
| South | $32 to $57 | $112 to $200 |
| West | $50 to $92 | $175 to $322 |
These ranges hold for full-truck delivered prices in 2026. Diesel surcharges, distance from the quarry, and load size all shift the number. Quotes get sharper once we know your ZIP and the tonnage you need.
Pipe Bedding mistakes to avoid
- Native soil instead of bedding stone, which leaves voids under the pipe.
- Compacting directly over the pipe before haunching the sides.
- Bedding too thin, which lets sharp soil punch into the pipe wall.
- Skipping the haunching pass, so the pipe bends under load.