A percolator, or perc, is a glass piece inside a water pipe that splits smoke into many small bubbles as it passes through water. Smaller bubbles mean more contact with water, which cools the smoke for a smoother draw. The trade-off is drag: more percolation makes you pull harder and makes the piece harder to clean.
Key takeaways
- A percolator increases diffusion: it breaks smoke into smaller bubbles so more of it touches water.
- Common types are tree, honeycomb, showerhead, inline, matrix and fritted disc.
- More percs and finer slits add cooling but also add drag and cleaning time.
- A downstem is the simplest diffuser. Many water pipes use a slitted downstem with or without a perc.
What does a percolator do in a water pipe?
It diffuses the smoke. Instead of one big bubble, the perc creates dozens of small ones, so more of the smoke is in contact with water before it reaches you.
That extra contact cools the smoke and gives a smoother feel. It also makes a water pipe bubble and sound differently. A perc does not change what you are using, only how the smoke travels through the water on the way to the mouthpiece.
What are the main types of percolators?
Each perc style balances diffusion, drag, durability and cleaning in its own way.
Tree
Tree perc
Several vertical arms with small slits. Strong diffusion, but thin arms can snap.
Honeycomb
Honeycomb perc
A flat disc with many small holes. Even diffusion and stackable.
Showerhead
Showerhead perc
A tube with a slotted base. Sturdy, easy to clean, light drag.
Inline
Inline perc
A horizontal tube with slits along it. Smooth with moderate drag.
Matrix
Matrix perc
A cylinder with many small slots. Good diffusion in a compact space.
Fritted disc
Fritted disc
A porous glass disc. Very fine bubbles but clogs easily.
| Perc type | Diffusion | Drag | Durability | Cleaning |
|---|---|---|---|---|
| Tree | High | Medium | Lower (thin arms) | Medium |
| Honeycomb | High | Medium | Good | Medium to hard |
| Showerhead | Medium | Low | High | Easy |
| Inline | Medium to high | Medium | Good | Medium |
| Matrix | High | Medium | Good | Medium |
| Fritted disc | Very high | High | Good | Hard |
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Honeycomb vs tree perc: which is better?
A honeycomb perc is sturdier and gives very even diffusion. A tree perc gives similar diffusion with a classic look but is more fragile. For durability, choose honeycomb; for a light draw and visible bubbling, choose tree.
You can see both styles in our range, such as the 9 inch water pipe with honeycomb perc and the 9 inch water pipe with an 8-arm tree perc.
What is drag on a water pipe?
Drag is how hard you have to pull to draw through the piece. Every perc adds a little resistance, and more percs or finer holes add more.
Some people like light drag for an easy, open pull, while others accept more drag for extra cooling. If a water pipe feels hard to pull, lower the water level slightly or choose a piece with fewer percs.
Are percolators hard to clean?
The more detailed the perc, the harder it is to clean. Showerheads are easy; fritted discs and stacked honeycombs take longer soaks.
- Empty the water and rinse with warm water.
- Add coarse salt and 91% isopropyl alcohol so the perc is covered.
- Plug the openings and shake gently, letting the mix flow through the perc.
- For detailed percs, let it soak for 20 to 30 minutes or use a soak cleaner.
- Rinse thoroughly and let it air dry.
Our guide on how to clean a bong covers soak cleaners for delicate percs.
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What is a downstem?
A downstem is the glass tube that carries smoke from the bowl down into the water. Many have slits at the bottom, called a diffused downstem, which act as a simple percolator.
- Size: downstems are measured by length and joint size, for example 14mm to 18mm.
- Fixed or removable: removable downstems are easier to clean and replace.
- Water level: fill until the downstem slits are just covered.
Do you need a percolator?
No. A simple beaker with a diffused downstem already filters through water. A perc adds extra cooling and smoothness, which many people enjoy, but it also adds drag and cleaning time.
How do you fill a water pipe with a percolator?
Add water until the percolator is just covered, usually about an inch above its slits or arms. Too little water skips the diffusion; too much can splash up into the neck.
- Pour fresh, room-temperature water in through the mouthpiece or the joint.
- Stop when the perc and the downstem slits sit just under the waterline.
- Take a test pull without anything in the bowl. If water reaches your lips, pour a little out.
- Check any upper chambers. Some multi-perc pieces need water in more than one chamber.
- Change the water after every session, or at least daily, to keep it fresh.
A good rule: if pulling feels hard and splashy, lower the water. If you hear little bubbling and the hit feels hot, add a bit more.
Can you add a percolator to a water pipe that does not have one?
Yes. A percolator ash catcher fits into the bowl joint and adds a perc chamber before smoke reaches the main piece. Match its joint size and angle to your water pipe, either 14mm or 18mm and 45 or 90 degrees.
An ash catcher perc is the simplest upgrade because it adds diffusion and keeps the main chamber cleaner. The tradeoff is extra height and a bit more drag, so smaller pieces can feel top-heavy with a large one attached.
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Frequently asked questions
What does a percolator do in a bong?
A percolator splits smoke into many small bubbles as it passes through water. More bubbles mean more contact with water, which cools the smoke for a smoother draw. The trade-off is that percs add drag, so you pull a little harder, and they take longer to clean.
What is the best type of percolator?
There is no single best perc. Honeycomb and matrix percs give strong, even diffusion and are fairly durable. Showerheads are the easiest to clean with light drag. Tree percs look great but can break. Choose based on how much drag you like and how much cleaning you want to do.
Does more percolators mean better?
Not always. More percs add cooling, but each one also adds drag and water splash risk, and the piece becomes harder to clean. Many people find one or two well-designed percs are enough. Very heavily percolated pieces suit people who want maximum smoothness and do not mind the pull.
What is the difference between a downstem and a percolator?
A downstem carries smoke from the bowl into the water and often has slits to diffuse it. A percolator is an extra glass chamber, usually higher in the piece, that diffuses the smoke again. Many water pipes have both, while simple pieces rely on the downstem alone.
How much water do you put in a bong with a percolator?
Add enough water to cover the downstem slits and the perc openings by a little, but not so much that it splashes into the mouthpiece. Fill slowly, take a test pull without lighting and adjust. Too little water reduces diffusion, while too much increases drag and splash.
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Pick a showerhead for easy cleaning, a honeycomb for durable diffusion or a tree for the classic look, and set the water just above the slits. Compare every style in our water pipes collection.
