Warranty
5-year warranty
A manufacturer defect warranty, with proof of regular maintenance.
Retain Drain · Catch basin inserts
The only good thing in stormwater is water.
Retain Drain is a patented stainless steel insert that sits under your existing grate and catches trash, sediment, oil and metals before runoff reaches local waterways.
Grab the litter and toss it. Click to drop more.Tap to drop litter.
- Caught on this page
- 0
- Raindrops through
- 0
A demo for fun, not test data. Tap the lot to drop litter.
Trash stays on the tray. Water drains through the slots and the coir filter.
Illustration, not to scale
What a lot sheds
Stormwater catch basins are the point of entry for debris and contamination that end up in our local waterways.
Every storm rinses the parking lot. This is what washes off with it.
Brake pad dust
CopperTire wear
ZincDrips from parked cars
OilSediment and fines
GritOrganic debris
LeavesCups, cans, butts, wrappers
Litter
Caught before the creek.
Retain Drain catches it at the catch basin, the first stop on the way to the water.
How it works
It fits under the grate you already have.
Retain Drain is a patented, modular insert made of 304 stainless steel. It sits inside your existing catch basin, under the existing grate, without construction.
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The grate stays.
Your grate stays where it is. Retain Drain's wide flange rests in the grate frame, right underneath it, so there's nothing to dig up or pour.
Illustration -
A laser-cut trash tray.
The perforated stainless tray holds trash, leaves and litter. It also takes energy out of the water, so less sediment stays suspended and moves on.
Lower turbidity · Less TSS (total suspended solids)
Illustration -
Side panels with windows.
Modular side panels in 304 stainless steel. Low windows let the green filter show through.
Illustration -
A coconut coir filter.
Sustainable filter mats made of 100% coconut coir. With the filter and the tray working together, Retain Drain traps hydrocarbons, metals, sediment and debris.
- Tan coir
- Green
- Navy
- Black
Illustration -
A stainless base plate.
The filter mat sits on a 304 stainless steel base plate at the bottom of the insert. Water passes through the coir and drains out below.
Illustration
5–10 min
Retain Drain assembles in 5 to 10 minutes with a couple simple tools.
Add-on
ADSORBIT Hula Bug
Adds oil protection when used with Retain Drain. ADSORBIT products remove up to twenty times their weight in oils, and we're an authorized ADSORBIT distributor.
Maintenance
Can you see green?
Check each insert at least once a month. Here's what to look for.
- Clear the trash tray
When you can't see the stainless steel perforated grate anymore, or if it's holding water.
- Swap the filter
If you can't see green. How often depends on your region, rainfall and contamination.
- Toss the old one
Used filters go straight into the regular trash. They aren't considered hazardous waste.
Regular checks mean less frequent vactor service, fewer vault system failures and longer cartridge filter life.
Filter, seen through a side window · Illustration
Proof
Tested with a full load.
450gal/min
For five minutes with a full debris load, in independent testing by a local water district.
10×
On average, trial filters trapped ten times their weight in contamination over a monthly maintenance period.
- Up to
50%
Maintenance may cut vactor and vault servicing costs by as much as 50% over five years.
Test results and estimates from Stormwater Controls' July 2019 product launch.
Port of Seattle Sustainable Century Awards
2024 winner
Environmental Innovation category.
“He's set himself apart for how much his drains can filter out.”
Where it works
From Clackamas to Bellingham.
Retain Drain launched in 2019 at several major retail locations along the I-5 corridor, between Clackamas, Oregon and Bellingham, Washington.
Home base
Silverdale, Washington
We're a Kitsap County company, based in Silverdale.
The 2019 launch
Busy retail lots
Retain Drain went in at several major retail locations along I-5, from Clackamas, Oregon up to Bellingham, Washington.
Trials
Costco warehouses
Retain Drain was trial tested at select regional Costco warehouses.
Our team
A Kitsap County crew.
A small team that knows parking lots. Plus one very good dog.
Boomer
Environmental Mascot
Consecutive winner of Employee of the Year.
Ken Perry
Founder & Managing Director
Entrepreneur, patent holder and developer with 30 years in facility management. His first company, founded in 1990, served large industrial and commercial properties, including parking lots. A lifetime Kitsap County resident and Western Washington University graduate.
Susan
Administrative Director
Spent 26 years as a marine pipefitter at Puget Sound Naval Shipyard. Volunteers with the Great Peninsula Conservancy and Puget Soundkeeper.
Alexander Perry
Systems Administrator
Keeps our systems secure and reliable.
Get pricing
Let's price your lot.
Tell us about your property and how many catch basins you have. We'll put together pricing for your site.
(360) 340-5810