
Donaldson|P566037
DONALDSON TRAP DN20 Tank/Drum Breather 3/4" M BSP P566037
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Email sales@goind.com.au or call 07 3204 2240 for live availability.
Ships from Brisbane warehouse. Standard delivery 2-5 business days Australia-wide.

KEEP MOISTURE OUT OF YOUR TANKS WITHOUT OVERPAYING
Donaldson breather trap for diesel and oil tanks. 3/4" BSP male thread. Reduces moisture and contamination in stored fuel at a modest price point.
What it does
Tanks breathe as fuel is drawn and temperature changes. Every breath pulls in air, and with it, moisture and dust. The P566037 screws into your vent port and filters that air before it enters the tank. Less moisture means fewer water slugs at the bottom of your tank and cleaner fuel at the pump.
Who this suits
Workshops, farms, and small fleets running standard diesel or oil storage. If you have a 3/4" BSP vent port and you want basic protection without spending on high-end filtration, this does the job. It is not certified for aviation or pharma-grade applications, and it is not trying to be.
Features & Benefits
Key Features
- 3/4" BSP male thread
- Weight 0.2 kg
- Fits diesel, oil, hydraulic tanks
- Reduces moisture ingress
- Thread-in replacement for vent caps
- Value-priced contamination control
Benefits
- Cleaner fuel means fewer filter changes downstream
- Fits standard tank fittings, no custom plumbing
- Low upfront cost for basic tank protection
- Lightweight unit, easy to install by hand
| Efficiency 98% | 3 micron |
| Outer Diameter | 80.8 mm (3.18 inch) |
| Thread Size | 3/4 BSP/G |
| Brand | T.R.A.P.™ |
| UPC Code | 742330178867 |
Shipping & Dimensions
Ships from Brisbane warehouse. Standard delivery 2-5 business days.
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3 micron
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80.8 mm (3.18 inch)
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3/4 BSP/G
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T.R.A.P.™
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742330178867
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Compatible Products
Frequently Asked Questions
Can't find your answer?
Contact UsWhat is the Donaldson breather trap?
A threaded vent cap that filters air entering your tank, reducing moisture and dirt contamination in stored diesel or oil.
Will this fit my tank?
It has a 3/4" BSP male thread. Check your tank vent port is 3/4" BSP female. Most Australian diesel tanks use BSP fittings.
How often do I replace the element?
Inspect every service interval or when you notice restricted breathing. Dusty or humid sites may need more frequent replacement.
Is this top-spec filtration?
No. It is a value-tier breather that does basic moisture and dirt control. For high-spec or certified filtration, contact us for alternatives.
What warranty and support do I get?
12 months on defects. Filter element is a consumable. For technical advice or bulk orders, contact sales@goind.com.au or 07 3204 2240.











