title: Parts Fit Guide description: Which bowl and ash catcher fits which piece, by joint size, male or female, and angle, with a fit chart for 14 mm and one for 18 mm. updated: 2026-11-08
A part fits a piece when two things match: the joint size, and the kind of joint. Ash catchers add a third: the angle.
- Size. Water pipes use 14 mm or 18 mm joints. The two don't fit each other.
- Male or female. A female joint is a socket. A male joint slides into one. A bowl fits a joint of the same size and the opposite kind.
- Angle. Only for ash catchers: 45° for a joint that comes out at a slant, 90° for one that points straight up.
Each lane below is one kind of joint on your piece. Tap it for every part in stock that fits.
- Female joint takes male parts: 14 bowls, 4 ash catchers
- Male joint takes female parts: 0 bowls
- Female joint takes male parts: 6 bowls, 2 ash catchers
- Male joint takes female parts: 0 bowls
The charts
- 14 mm joints: every 14 mm bowl and ash catcher, sorted by the joint it goes on.
- 18 mm joints: the same for 18 mm.
Not sure what you have?
- How to measure a joint: a dime tells 14 mm from 18 mm in a few seconds, no ruler needed.
- Male or female joints: which way round it goes, with a drawing.
- 14 mm or 18 mm bowls: what the numbers mean and what's on the shelf in each.
- Ash catchers: 45° or 90°: how to check your joint's angle before you buy.
Every bong and bubbler page here shows its height and its joint, and lists the bowls and ash catchers that fit it.