Drawing on the dismal failures of some of the stand-alone bioretention "tree box" systems, Katchall recently designed a single-vault system that includes ALL of the following features:

1.    A properly designed BioFiltration System,

2.    Filtered high-flow bypass chamber, (eliminates the need for secondary inlet structures),

3.    Pre-entry trash net device across the entire throat opening,

Hydraulic capacities have been substanually increased, (from as little as .126 Cfs to 35.0 Cfs),

Draw-times have been substanually decreased, (from 24-48 hours) to as little as 4-hours.

Katchall Bio-Filtration Chambers can be as small as 6' x 4' to as large as 20' x 8'. All units are cast-in-place, insuring proper fitment with surrounding sidewalks, curb and gutters using monolithic pours.

A large selection of tree grate covers are available in several different materials and finishes, along with several selections of tree guards, (Refer to Grate Covers--Tree Guards).

Simply click one of the links below for more information about which specific series will best fit your application. Data Sheets include dimensions, flow-rates, pipe sizes, etc.

36 different vault sizes are currently manufactured -- custom sizes / grate openings available

600 Series           6-foot Lengths     Filtered flow-rates from 7.5 Cfs--10.2 Cfs


800 Series           8-foot Lengths     Filtered flow-rates from 10.0 Cfs--13.7 Cfs


1000 Series       10-foot Lengths     Filtered flow-rates from 12.5 Cfs--17.1 Cfs


1200 Series       12-foot Lengths     Filtered flow-rates from 14.9 Cfs--20.6 Cfs


1400 Series       14-foot Lengths     Filtered flow-rates from 17.4 Cfs --24.0 Cfs


1600 Series       16-foot Lengths     Filtered flow-rates from 19.9 Cfs--27.4 Cfs


1800 Series       18-foot Lengths     Filtered flow-rates from 22.4 Cfs--30.8 Cfs


2000 Series       20-foot Lengths     Filtered flow-rates from 25.0 Cfs--34.2 Cfs


Available Grate Configurations     Single, Dual, Triple