Style reference
French Drain
3/4" washed drain rock over perforated pipe, wrapped in filter fabric — the classic residential detail.
⛏ Crushed Aggregate
Drain Rock
Washed aggregate sized to move water freely without carrying fines. In California most yards sell 3/4" drain rock as the standard French drain and dry well material, with 1 1/2" available for higher-flow applications.
Available sizes
3/4"1"1 1/2"
Gallery
Material pile
Installed
Wet
Close-up
Representative visualizations. Actual color, texture, and size vary by supplier and lot.
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Order Drain Rock — delivered.
- Delivered to your project
- Contractor pricing available
- Managed by Yardexa end-to-end
- One point of contact
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Availability
In stock- Available in Southern California
- Available in Northern California
- Delivered pricing available
- Heavy equipment delivery available
Typical lead time
1–3 business days
Delivery options
End dumpSuper sacksTruck & transfer
Yardexa coordinates pricing and delivery — you order through Yardexa, not through individual yards.
Why order through Yardexa
A real materials company — coordinated for you.
- Material expertiseEvery product page written by people who spec and deliver materials for a living.
- Managed procurementOne request per project. Yardexa handles pricing, sourcing, and delivery — no calls to five yards.
- Professional supportA specialist follows every order — before, during, and after delivery.
- Delivered pricing, preparedYardexa prepares delivered pricing that includes truck, fuel, and site coordination — not a surprise on the invoice.
- Fulfillment network handledYardexa coordinates sourcing behind the scenes — you never contact yards directly.
- California coverageLive routes across LA, OC, San Diego, Riverside, Inland Empire, and Ventura.
- Project planning toolsCalculators, bundles, and a project cart that mirror how contractors actually order.
Style references
Installed examples
Where Drain Rock shows up in real landscape work. Each reference links to its project guide and calculator.
Style reference
Retaining Wall
Dry-stacked segmental block on a compacted aggregate base with washed drain rock and pipe behind.
Style references illustrate the intended installed look. Verified photography is added as it becomes available.
Advantages
- Washed clean of fines
- Locks in perforated pipe
- Standard for French drains and dry wells
Applications
- French drains
- Dry wells
- Foundation drains
- Behind retaining walls
- Trench drains
Specifications
- Density
- 1.35–1.4 tons per cubic yard
- Void space
- ~35%
- Wash
- Rinsed to remove fines
Coverage per cubic yard
| Depth | Coverage |
|---|---|
| 4" | 81 sq ft |
| 6" | 54 sq ft |
| 12" | 27 sq ft |
Common uses
French drainsRetaining wall backfillFoundation drainsBioswale ballast
Installation tips
- Wrap the trench in filter fabric before placing drain rock — this is the single biggest failure mode of French drains.
- Backfill a minimum 4" below and 4" above perforated pipe.
- Slope perforated pipe 1% (1/8" per foot) minimum toward daylight.
Ordering tips
- Buy the size that matches your pipe perforations — 3/4" for standard perf pipe.
- A 100 ft x 12" wide x 12" deep trench needs ~3.7 yd of drain rock.
Common mistakes
- Using unwashed base rock as drain rock — fines clog the system.
- Skipping filter fabric — soil migrates in and the drain fails within a few seasons.
Compare with
Related calculators
Related materials
3/4" Crushed Rock
Angular crushed aggregate — driveways, drainage, and base.
Landscape Fabric
Woven or non-woven fabric that suppresses weeds under mulch and rock.
Perforated Pipe
Slotted or perforated pipe for French drains.
Catch Basin
Grated inlet that collects surface water into a piped system.
River Rock
Smooth, rounded decorative stone in multiple sizes.
Frequently ordered together
French drain bundle
French Drain Bundle
Everything a standard residential French drain needs.
- Filter Fabricdrainage
- Perforated Pipedrainage
- Catch Basindrainage
Retaining wall bundle
Segmental Retaining Wall Bundle
Block, drainage, and base for an engineered segmental retaining wall.
- Allan Blockretaining
- Road Basecrushed
- Filter Fabricdrainage
Related guides
Frequently asked
- What size drain rock for a French drain?
- 3/4" is standard for residential French drains. Larger sizes are used for higher-flow civil work.
- Is drain rock the same as pea gravel?
- No. Drain rock is washed and sized specifically for drainage; pea gravel is round decorative stone that packs too tight for high-flow drainage.
- How many tons of drain rock do I need?
- About 1.35 tons per cubic yard. For a 40 ft trench at 12"x12" you'll need ~1.5 yards / 2 tons.