Channel and trench drains capture runoff across a continuous surface before water reaches garages, entrances, patios, and other areas that need protection. Contractors represented by Drainage Pro LA install linear drainage systems for Los Angeles properties where a single drain inlet cannot effectively intercept water moving across a wider area.
The drain must be positioned across the runoff path and set at the correct elevation. Channel size, grate type, surface slope, expected water flow, outlet capacity, and traffic exposure all influence the installation.
Where Trench Drains Are Used
Linear drains are suited to paved areas where runoff travels across a broad edge or toward an opening. The grate intercepts that flow along the length of the channel instead of relying on water to reach one collection point.
Common installation areas:
- Driveways sloping toward garages
- Patios with surface runoff
- Garage and property entrances
- Walkways, courtyards, and hardscapes
Channel & Grate Selection
A trench drain is more than an open channel with a grate. The system needs enough capacity for the runoff reaching it, while the grate must suit the location, surrounding surface, and loads expected over the drain.
Channel Capacity
Channel dimensions and outlet connections are selected to handle runoff entering the drain along its length.
Grate Selection
Grates are matched to the application, including pedestrian areas, driveways, and surfaces exposed to vehicle traffic.
Trench Drain Installation
Installation requires accurate elevation and secure integration with the surrounding pavement. The finished grate should intercept runoff without creating an unnecessary obstruction across the surface.
Map the Runoff
Surface slope and water direction are checked to determine where the drain should intercept runoff.
Set the Channel
The drain is positioned at the required elevation and connected to the planned drainage outlet.
Finish the Surface
The surrounding area is restored so runoff can enter the grate cleanly across the finished surface.
Trench Drain FAQs
Trench drains are useful where runoff moves across paved surfaces or toward openings. Driveways, garage entrances, patios, courtyards, and walkways are common applications.
When a driveway slopes toward a garage, a properly placed trench drain can intercept surface runoff before it reaches the garage opening. The system still needs adequate drainage capacity and a suitable outlet.
A channel drain collects water across a linear area, while a catch basin collects runoff at a single low point. The better option depends on the surface, grade, and way water moves across the property.
Yes, when the channel, grate, support, and installation method are designed for the expected load. A driveway application requires different considerations than a pedestrian patio or walkway.
Yes. Leaves, sediment, dirt, and other debris can restrict the grate or accumulate inside the channel. Periodic cleaning helps keep the drain open and maintains its ability to collect runoff.