A UFO percolator is a disk- or saucer-shaped percolator that, with its side slits, resembles a UFO – hence the name. It is often combined with other percolators and provides additional, even filtration.
How does a UFO percolator work?
The smoke flows into the flat disk and exits through the slits distributed around the edge. This creates many fine bubbles that are evenly distributed. Because of its flat design, the UFO percolator is often used as a second filter stage above another percolator.
The advantages
- Even diffusion – slits all around the edge.
- Flat design – ideal as an additional filter stage.
- Smooth draw – noticeably cools the smoke.
UFO percolator in combination
The UFO percolator often shows its strength in combination: as a lid over a Honeycomb or Tree percolator. This filters the smoke multiple times – for a maximally smooth draw.
Frequently asked questions
Is a UFO percolator alone enough?
It filters well, but is often combined with a second percolator to enhance the effect.
How do I clean a UFO percolator?
Like other percolators: flood with cleaning solution and rinse multiple times.
Why is it called a UFO?
Because of its flat, saucer-like shape with circumferential slits.

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Honeycomb percolator
Filter chamber