Introduction: DIY Hardware Trawl

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We will show you how to make a trawl using 40$ supplies from any hardware store.

Step 1: Supplies

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You will need the following supplies :

1) A wooden plank

2) Air conditioner Duct

3) Paint Filters (1 Pack)

4) Worm gear clamp

5) 4 round head screws

6) 4 Bolts

7) Rope

Step 2: Drill Holes Into the Wooden Plank and the Duct

Picture of Drill Holes Into the Wooden Plank and the Duct

Align the duct in center on one side of the wooden plank. Mark four points (two on each side) on the wooden plank and duct to drill the holes. (Image 1 & 2) (insert dimensions)

Drill two more holes in the plank (Image 3) (insert dimensions)

Step 3: Screw in the Duct Onto the Wooden Plank

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Using the screws and bolts, fix the duct on the plank

Step 4: Attach the Filter and Worm Gear Clamp

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Attach the filter to the duct and lock it using the worm gear clamp

Step 5: Tie the Rope

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Tie the rope on to the wooden plank

Step 6: You're Ready to Trawl!

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Step 7: Process Samples

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Check out how to process the samples collected.


arutledge4 (author)2016-09-19

this is brilliant.

Jobar007 (author)2016-09-12

That's an awful small scoop on your trawl. Unless you know that you are running right through what you are trying to scoop, you aren't going to gather much in there. This is a neat concept though that is easily approachable.

Just a point of curiosity, what are you seeking to collect with this? Is it just anything that might come up in the net?

Testourwaters (author)Jobar0072016-09-19


Thank you for your feedback. Our aim is to skim our waters for plastic pollution and to study our findings further. We are in the process of designing more DIY trawls that are affordable so as to encourage more people to trawl. This is our first mockup and we are definitely looking forward to improve it. You can check out more information on our website :

DIY Hacks and How Tos (author)2016-09-11

Fun summer project. I wish I lived near water. I would try this out.

About This Instructable




Bio: Empowering citizen scientists to track and together prevent marine pollution.
More by Testourwaters:Citizen Science ProcessingTrawlbourineFrog Trawl
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