POLYCAST® 400 Series


Typical Applications

  • Shopping Malls
  • Grocery Stores
  • Tennis Courts
  • Swimming Pools
  • Walkways
  • Patios


Hubbell’s POLYCAST® 400 Series is a residential-grade, polymer concrete trench drain system designed for light traffic applications such as sidewalks, patios and tennis courts. The POLYCAST® 400 Series channels are non-sloping. Channels are fitted with galvanized steel slotted grates that can withstand the weight of light vehicles such as lawnmowers and golf carts. The slotted steel grates are pedestrian-friendly and bicycle-safe.


Installing the POLYCAST® 400 Series is made easier with installation chairs, which screw snugly into dimples located at the ends of each channel. Staked to the ground with rebar, POLYCAST® installation chairs allow contractors and homeowners to secure and adjust channels on-site for an easier installation. Solid end caps and 3” diameter pipe outlets come standard with the 400 Series. You can also drill out the channel bottom “knock-out” to attach a pipe as a bottom outlet.


Though originally designed as a low-cost option for the homeowner or light-duty drainage project, POLYCAST® 400 has limitations. TDS recommends the POLYCAST® 600 series which has a wider selection of grating as opposed to the one-slotted galvanized steel option for this system. With the 400 series, you get a neutral channel and one grate option. The POLYCAST® 600 is comparable in price, has a higher flow rate and is a pre-sloped system.

400 Series Trench Drain System Details

POLYCAST® 400 Series Drainage Channel

Polycast 400 Series Fact Sheet

Channel Length: 4′ (48″), 2′ (24″)
Channel Width (OD): 5″
Channel Width (ID): 4.25″
Inlet Depth: 4.5″
Outlet Sizes: 3″ end, 4″ bottom

Installation Chair

Installation chairs are the most efficient and economical means of setting a precast trench system. The installation chair supports the ends of the channel, aligns and locks the joints rigidly together, and prevents the channels from floating. Adjusting channel elevation is easy. One chair is required for every joint. The chair is made from 1018 hot rolled steel and has a zinc plated finish.

POLYCAST® Installation Chair

Pipe Adapter End Caps

Polycast end caps are used to enclose or provide piping transitions to outlet or inlet ends of the channel whenever catch basins are not being used. End caps output to a 4″ pipe. Material is ABS plastic.

Polymer concrete end caps are also available.

POLYCAST® 400 Pipe adapter and endcap