What a percolator does
In a basic bong, smoke leaves the downstem and rises through the water in a few large bubbles. A percolator adds a second stage of water where the smoke is forced through many small slits or holes. Small bubbles have more surface area, so the smoke touches more water and comes out cooler. The trade-off is a little more drag when you inhale and more glass to clean.
Common percolator types
| Type | What it looks like | Diffusion | Drag | Ease of cleaning |
|---|---|---|---|---|
| Tree (arm) | Several thin vertical tubes with slits | High | Medium | Medium; arms are fragile |
| Showerhead | A tube ending in a bell or disc with slits around the base | Medium to high | Low | Easy |
| Honeycomb | A flat glass disc full of small holes | High | Medium | Harder; holes clog |
| Inline | A horizontal tube with slits along its length | Medium to high | Low | Easy |
| Matrix / stereo matrix | A cylinder covered in small holes | Very high | Medium | Medium |
| UFO / dome | A dome with slits near the base | Medium | Low | Easy |
| Recycler | Tubes that loop water back down through a chamber | Medium | Medium | Medium |
Do you need one?
It depends on how you use the bong. A percolator is worth it if you want a cooler, more diffused pull and do not mind a few extra minutes of cleaning. A plain beaker with a diffused downstem is easier to keep clean, cheaper, and plenty for most people. One good perc beats three stacked ones: every extra chamber adds drag and more places for residue to collect.
How percs change your setup
- Water level: the perc slits must be fully under water. See how much water to put in a bong.
- Cleaning: residue hides in slits and holes, so soak before you shake. Steps in how to clean a bong.
- Add-on percs: an ash catcher with a built-in perc adds a diffusion stage to a bong that has none.
Common mistakes
- Underfilling. If the slits sit above the water line, the perc does nothing.
- Overfilling. Too much water over a perc causes splashback into the neck.
- Buying on perc count. More percs is not automatically better. Check the glass thickness and the joint, too.
Pro tip
For a first percolator bong, an inline or showerhead perc gives good diffusion with the least drag and is the easiest to clean. Our percolator bongs guide compares models in depth.
