Mitered Drain - 4" Drain with HDPE Black Grate, 3:1 Slope

The Mitered Drain™ 4" Drain with HDPE Black Grate and a 3:1 slope offers a highly efficient drainage solution for flat or hard-to-drain areas. Its sloped design allows water to flow directly into the pipe at grade, eliminating standing water common with conventional drop inlets. Designed to function as both an inlet and an outlet, this pre-assembled unit is ideal for detention ponds, culverts, downspouts, bioswales, and more. The durable HDPE grate is secured with stainless steel screws and attaches to a Schedule 80 mitered pipe section, providing fast installation and long-lasting performance with minimal maintenance requirements.

Key Features:

• Sloped grate design improves drainage where grade difference is minimal
• Functions as both an inlet or outlet for maximum application flexibility
• Minimizes standing water—ideal for mosquito abatement zones
• Optimized for bioswale usage to enhance natural filtration and infiltration
• HDPE grate with UV inhibitors resists corrosion and environmental wear

Technical Specifications:

• Grate Material: High-Density Polyethylene (HDPE) with UV inhibitors
• Attached Pipe: Schedule 80 PVC, mitered at 3:1 slope
• Opening Area: 17-7/8"
• Grate Width: 5"
• Pipe Diameter: 4"
• Installation: Pre-assembled with attached pipe, no concrete or forms required
• Made in the USA

Installation & Application:

• Perfect for flat sites, bioswales, detention ponds, culverts, and downspouts
• Pre-assembled unit allows for fast, tool-minimal installation
• Improves drainage without drywells, pop-up emitters, or freeze-sensitive parts

Compatibility & Optional Accessories:

• Adaptable to most pipe materials using a standard coupling
• Stainless steel screws allow for grate removal and cleaning

Improve drainage and minimize stagnant water with the engineered performance of Mitered Drain™. Designed for tough installations, it’s the low-maintenance solution for sustainable stormwater management.