Question: How often should trees be replaced in a Filterra system?

Answer: The trees and plants in a Filterra bioretention system do not need to be replaced on a fixed schedule. With proper species selection and maintenance, trees can last 10–20+ years.

They should only be replaced when they show signs of disease, pest infestation, or decline that cannot be treated.  For a complete list of recommended plants, please visit https://www.conteches.com/technical-guides/search/?filter=OOIA4XCWXG

Question: Does the modular wetlands linear system come in prefabricated sizes?

Answer: Yes, the Modular Wetlands Linear system is available in various prefabricated sizes.  The sizes available depend on the configuration (open planter, underground). Custom sizes may also be available.

Prefabricated sizes include:

• 4' x 4'
• 4' x 6'
• 4' x 8
• 4' x 13'
• 4' x 15'
• 4' x 17'
• 4' x 19'
• 4' x 21'
• 6' x 8'
• 8' x 8'
• 8' x 12'
• 8' x 16'
• 8' x 20'
• 8' x 24'
• 4' x 4'

These sizes provide flexibility to meet specific site constraints and installation requirements.

Question: What is the difference between the Filterra and the Modular Wetland System

Answer: The Filterra and Modular Wetland System (MWS) are both proprietary stormwater treatment systems that use biofiltration but differ in treatment processes, configurations, and size.

Both products are approved through numerous local, state and federal verification programs, including the New Jersey Department of Environmental Protection (NJ DEP)  and Washington Department of Ecology (GULD) – Basic, Enhanced, Phosphorus, and Oil.

Filterra

• Type: High-flow biofiltration system
• Design: Compact, tree-box-style system with engineered media in a concrete vault
• Treatment Process:
• Stormwater enters the unit through an inlet
• Flows through a specially designed biofiltration media
• Captures pollutants like sediments, nutrients, heavy metals, and hydrocarbons
• Treated water exits through underdrains
• Configurations
• Filterra Offline
• Filterra Peak Diversion
• Filterra Internal Bypass Curb
• Filterra Bioscape Vault
• Filterra Bioscape Vault Basin
• Filterra Bioscape

Modular Wetland System (MWS)

• Type: Horizontal flow biofiltration system
• Design: Multi-stage treatment train that integrates media filtration, wetland vegetation, and subsurface flow
• Treatment Process:
• Stormwater enters a sedimentation chamber for pretreatment
• Passes through a horizontal biofiltration chamber with engineered media and vegetation
• Treated water exits through underdrains

·         Configurations

• •         Curb Inlet
  •     Vault
  •     Downspout

Question: Where can I find a user manual?

Answer: User manuals for all Contech products can be found in our technical documents library at https://www.conteches.com/technical-guides/search/

Question:  How do I become certified to perform maintenance on Filterra?

Answer: Companies interested in becoming a Contech Certified Maintenance Provider should contact Kristin Jewell Inside Sales Coordinator – Activation & Maintenance, at [email protected] 

Question: What is your warranty?

Answer: Contech warrants that the products sold hereunder are substantially free from defects in manufacturing and workmanship and shall conform to the specifications described in this quotation for a period of one (1) year from the date of delivery. This limited warranty does not apply to any products sold hereunder which have been modified or disassembled, that have been subjected to misuse, misapplication, neglect, alteration, accident or act of God, or that have been improperly installed, operated or maintained.

For more information, please review our Terms and Conditions of Sales at https://www.conteches.com/cos/

Question: How much does a Contech stormwater system cost?

Answer: Prices of Contech stormwater products vary based on several variables, including size, standard vs. custom designs, flow rate capacity, delivery location and other factors. For pricing information, we recommend you contact your local Contech representative. 

Question: What is the minimum height for the Kraken Filter?
Answer: Assuming 10” tall cartridges and 18.5” minimum drop from inlet to outlet, the Kraken vault could be as short as 3’-0” from rim to system invert.