Wholesale Hardscapes
Corrugated Pipe - 4 x 100 Flexdrain Corrugated Pipe
$145.00
4" x 100' Flex Drain Corrugated Pipe
Flex Drain 4" corrugated pipe is the industry standard for residential and commercial drainage systems in hardscape installations. This 100-foot roll of solid single-wall corrugated pipe is designed for gravity-fed water management, carrying runoff away from patios, pool decks, retaining walls, driveways, and foundations. It's lightweight, flexible enough to navigate around obstacles, and easy to cut to length on the jobsite.
For hardscape contractors, proper drainage is non-negotiable — water is the number one enemy of any paver or wall installation. Running corrugated pipe behind retaining walls, beneath patios, and along grade transitions protects the investment and prevents settling, erosion, and hydrostatic pressure buildup.
SPECIFICATIONS
Specifications
- Diameter: 4 inches
- Length: 100-foot roll
- Wall type: Single wall, solid (non-perforated)
- Construction: Corrugated HDPE
- Connection: Soil-tight split, internal coupler, and snap fittings available
- Flow type: Gravity-fed drainage
- Flexibility: Bends around obstacles without fittings on gentle curves
- Common applications: Downspout extensions, French drain outlets, retaining wall drainage, patio runoff, gutter discharge lines
HOW TO USE
Installation Tips
- Maintain a minimum 1% slope (1/8" per foot) for proper gravity flow
- Use solid pipe for carrying water away; use perforated pipe for collecting water in French drains
- Wrap connections with landscape tape or use snap fittings for soil-tight joints
- Bed pipe in drainage gravel when running behind retaining walls
DETAILS
Complete Your Project
- Catch Basins (collection points for surface water)
- Pea Gravel or Drainage Stone (pipe bedding)
- Geotextile Fabric (prevents soil migration into gravel bed)
- Channel Drains (surface collection for patios and pool decks)
- Fittings: Tees, elbows, couplers, and pop-up emitters