Glass Ash Catchers

Confused about joint size or 45° vs 90°? Our ash catcher guide explains exactly how to match one to your bong, including how to install and remove it without cracking the glass.

Ash Catcher Bong Attachments for Cleaner Glass and Smoother Hits

An ash catcher bong attachment is one of the most practical upgrades you can add to any water pipe. It sits between your bowl piece and your bong's joint, acting as a first line of defense against the ash, resin, and debris that would otherwise flow directly into your main water chamber. The result is cleaner glass that stays cleaner longer, fewer deep cleans, and noticeably better-tasting smoke because you're not pulling through days of accumulated residue every time you take a hit.

There are 29 ash catchers in this collection starting at $15, across both joint sizes, both joint angles, and every perc style we make. Three specs decide which one fits your bong: size, angle and gender. Get those right and the rest is preference.

Ash Catcher Joint Sizes: 14mm and 18mm

Joint size is what decides whether the ash catcher physically connects to your bong. It has nothing to do with performance — a 14mm and an 18mm version of the same catcher filter identically. You just need the one that matches your piece.

14mm ash catchers fit the majority of modern bongs. If your piece is a standard beaker or straight tube and you have never checked, 14mm is the safe assumption. It is also the standard on dab rigs and smaller glass.

18mm ash catchers fit larger and heavier builds — big beakers, thick 7mm and 9mm glass, and high-capacity tubes. An 18mm joint has a wider opening and a correspondingly wider bore, which means slightly less restriction on the pull. Several AFM catchers, including the Lucky Goat dry range, ship as 14mm male and 18mm male options of the same piece, so you can match whichever your bong uses.

One combination worth knowing: an 18mm to 14mm catcher seats in an 18mm bong but accepts a 14mm bowl on top, which lets you keep using bowls you already own. If you end up mismatched in either direction, a glass adapter bridges most size and gender combinations for a few dollars rather than replacing the catcher.

Joint Angles: 45 Degree and 90 Degree

Angle is what decides whether the catcher sits upright once connected. Get it wrong and the piece leans, water pools against one wall and spills into your bong, and the joint takes strain it was not built for.

45 degree is what you need for almost every beaker bong and most straight tubes — the joint angles outward from the body and the downstem slides in diagonally. 90 degree is for pieces whose joint points straight up, parallel to the neck, which shows up on some scientific and lab-style builds with a vertical intake. If you are looking at a beaker, you almost certainly want 45. Our 45 vs 90 degree guide has a quick-reference table by bong style.

On gender: your bong joint is female, so the ash catcher goes in male side down. The top of the catcher is female, so your existing bowl drops straight in with nothing else to buy.

Dry Ash Catchers

A dry ash catcher holds no water at all. It is a chamber that traps ash, resin and debris by gravity before any of it reaches your bong, and that is the whole job. No percolator, no second water stage, almost no added drag.

Dry is the right choice in two situations. First, if your bong already runs two or more percolators, you are near the drag limit and adding another water chamber turns every hit into work — a dry catcher gives you the cleanliness benefit for free. Second, if you smoke from a straight tube and value how fast it clears, a perc catcher slows down exactly the thing that makes a straight tube worth owning. Dry catchers are also the lightest option, which matters on thinner 5mm glass where a heavy catcher hanging off the joint is a crack waiting to happen.

AFM dry catchers start at $15, with the Lucky Goat clear, colour and vortex styles available in both 14mm and 18mm male.

Perc Ash Catchers

A perc ash catcher holds its own water and diffuses smoke through it before the main chamber, giving your setup two genuine stages of filtration. On a simple beaker or tube with a single downstem, this is the single most noticeable upgrade available. The trade-offs are more drag, more weight on the joint, and a second small chamber to clean.

• Showerhead perc — a slitted dome that pushes bubbles out in an even ring. The best all-rounder: strong diffusion, moderate drag, easy to clean. The widest style in this collection.
• Honeycomb perc — a flat disc drilled with many small holes, producing the finest bubbles of any design with surprisingly little added resistance. Choose this if smoothness is the priority.
• 6-arm tree perc — six slitted arms diffusing at once for maximum surface contact. The smoothest option here, and the one that rewards regular cleaning.
• Reclaim catcher — a dry, angled chamber for dab rigs that collects concentrate residue instead of ash.

A useful rule for deciding: count the water chambers you would end up with including your bong. Two is the sweet spot. Three suits people who prize smoothness over effort. Four is a chore.

Which Ash Catcher Fits Your Bong?

Matching a bong ash catcher to your piece comes down to three things, and all three are printed on every AFM product page.

1. Joint size. Measure or check the listing for your bong. 14mm is the most common size across beakers and tubes. 18mm shows up on larger and heavier pieces. Your ash catcher needs to match.
2. Joint angle. Look at how the joint leaves the body of your bong. Angled outward is 45 degrees, which covers most beaker bongs. Pointing straight up is 90 degrees, common on scientific and straight-neck builds.
3. Gender. Your bong joint is female, so the ash catcher goes in male side down. The top of the catcher is female, so your existing bowl drops straight in with nothing else to buy.

Why Every Bong Needs an Ash Catcher

• Traps ash and debris before it enters your main water chamber
• Keeps your bong cleaner between full cleans
• 45 and 90 degree angles for different bong joint styles
• 14mm and 18mm joint sizes to fit most standard bongs
• Dry catchers from $15 and perc styles for a second filtration stage
• Free US shipping on orders over $75

Browse all 29 ash catchers below. For a complete look at all bong upgrade options, check out our bong parts and accessories collection, or pair your ash catcher with a new bowl piece and downstem for a full upgrade.

Ash Catcher FAQs

What does an ash catcher bong attachment actually do?
An ash catcher sits between your bowl piece and your bong's joint, trapping ash, resin, and debris before it reaches your main water chamber. Your bong stays cleaner for longer, deep cleans are less frequent, and your smoke tastes better because you aren't pulling through days of buildup every hit.

45 degree vs 90 degree ash catcher: which do I need?
Match the angle to your bong's joint. If the joint angles outward from the body so the downstem sits diagonally, which covers almost every beaker bong and most straight tubes, you need a 45 degree ash catcher. If the joint points straight up, common on some scientific pieces, use 90 degrees. The wrong angle puts the catcher at a tilt and water can spill.

What size ash catcher fits my bong, 14mm or 18mm?
Check the joint size on your bong (it's listed on the product page). 14mm is the most common and the safe assumption on a standard beaker or tube. 18mm is found on larger and thicker pieces. AFM ash catchers come in both, and several styles ship as 14mm male and 18mm male versions of the same piece.

Is an 18mm ash catcher better than a 14mm one?
No, they filter identically. Size is purely about fit — buy whichever matches your bong's joint. The only practical difference is that an 18mm joint has a wider bore, so there is marginally less restriction on the pull. If your bong is 18mm and you want to keep using 14mm bowls, look for an 18mm to 14mm catcher.

Do you put water in an ash catcher?
Only if it has a percolator. Fill it just enough to cover the perc slits, usually a quarter to a third of the chamber. Too much water and it will pull into your bong when you clear the piece. Dry ash catchers take no water at all.

Dry or perc ash catcher: which should I buy?
If your bong is a simple beaker or tube with one downstem, buy perc — the second water stage is the whole point and you have filtration headroom. If your bong already runs two or more percolators, or you smoke from a straight tube and value fast clearing, buy dry. You keep the debris-catching benefit without paying for it in drag.

Does an ash catcher actually make hits smoother?
Yes, especially the ones with built-in percs. A perc ash catcher gives smoke a first round of water filtration before it even hits your main chamber, adding a full second stage of cooling and diffusion. Dry catchers help mainly with cleanliness rather than smoothness.

Will an ash catcher fit any bong?
Any bong with a standard 14mm or 18mm female joint and a removable downstem, which covers almost everything we sell. What has to match is size and angle. Bongs with fixed built-in downstems do not accept one, since the joint is already occupied.

How often should I clean an ash catcher?
Every 1 to 2 weeks for daily users, or whenever you can see residue building up on the glass. Soak in 91 percent isopropyl with coarse salt for 20 minutes, shake, and rinse. Because the catcher is small, cleaning takes about a third of the time of cleaning the bong itself.