Main Drains

Fluidtrol Offers three materials of construction.

PVC, FRP and 304 Stainless.

Standard grates are PVC but are also offered in Fiberglass.

PVC grates are constructed from high-impact PVc tubing 3/8" x 3/4". Pultruded fiberglass bars (specify polyester of vinyl ester resin) are used to construct fiberglass grates

Anti-vortex covers are available.

Included in the prices standard packaging: Hydro-static relief valves, slotted pipe connectors, and flanged or slotted outlets.

Normal Max Flange Size (1)	Grate Open Area (2)	Flow Rate (@ 1.5 fps water velocity) (3)	Dimensions			PVC Part Number	FRP Part Number	Stainless Part Number
Normal Max Flange Size (1)	Grate Open Area (2)	Flow Rate (@ 1.5 fps water velocity) (3)	Grate Width	Grate Length	Box Height	PVC Part Number	FRP Part Number	Stainless Part Number
4 in	72 in²	330 gpm	12 in	12 in	12 in	MD-1-121212	MD-8-121212	MD-6-121212
4 in	72 in²	330 gpm	12 in	12 in	18 in	MD-1-121218	MD-8-121218	MD-6-121218
8 in	162 in²	750 gpm	18 in	18 in	18 in	MD-1-181818	MD-8-181818	MD-6-181818
8 in	216 in²	2010 gpm	18 in	24 in	18 in	MD-1-182418	MD-8-182418	MD-6-182418
8 in	288 in²	2685 gpm	24 in	24 in	18 in	MD-1-242418	MD-8-242418	MD-6-242418
12 in	288 in²	2685 gpm	24 in	24 in	24 in	MD-1-242424	MD-8-242424	MD-6-242424

General Dimension Restrictions (flange OD clearance). not based on flow recommendations.
Based on 50% open area. If your particular codes/application requires different - Contact a Fluidtrol
Dealer Calculations performed using 50% open area grate spacing. When 40% and other open area specifications are met - velocities are changed.

Grate width and length dimensions are based on the open grate inside of all support structure. Therefore, add 2 1/2" to grate width and length for box outside dimensions. PVC grate assemblies are 1 1/16" tall and are contained within the drain box height. Water stops extend 2" outside of the drain box perimeter. The height of the water stop is 2" below the grate surface.

Drawing