2 1/2 Inch Drain Rock (Size #2) for Drainage and Run-Off

Also sold as 2 1/2 inch wash or clean rock, Size #2 Drain Rock is crushed stone running from 3 inches down to 3/8 inch with no fines in the mix. Removing the fines is what gives it its purpose: with nothing to bind the stones together, the material drains freely instead of compacting, so water moves straight through it rather than sitting on top. That makes it the right choice anywhere water needs somewhere to go.

It is a true workhorse for drainage work. Crews use it for water run-off areas, leach fields, French drains, and around foundations, and it is a proven fix for driveways and parking areas that turn to mud in wet weather. Laid over problem ground, the clean rock keeps a stable, free-draining surface that does not churn up the way a fines-heavy material would.

Because the stones are larger and uniform, the layer also resists clogging and holds its shape well over time, which is valuable on the wet, windward side of the island where run-off is constant. For the same kind of work at a smaller size, the 1 1/2 Inch Drain Rock behaves the same way, so the choice between them usually comes down to the scale of the area and how much flow you need to move.

Common uses:

• Water run-off and drainage areas
• Leach fields and French drains
• Foundation and footing drainage
• Muddy driveways and parking areas
• Landscaping where drainage matters

Good to know:

• Crushed rock from 3 inch down to 3/8 inch
• No fines, so it drains freely and will not compact
• Resists clogging and holds its shape
• Step up from 1 1/2 inch drain rock for larger areas

In stock now. Request a quote for 2 1/2 Inch Drain Rock delivery on the Big Island.