Match the joint size
Common glass joints are 10mm, 14mm and 18mm. A reducer steps a larger opening down; an expansion adapter connects a smaller fitting to a larger joint.
Fit first. Function always.
Glass Adapters for Bongs
Match joint size, gender and angle without replacing the glass you already trust. Shop borosilicate reducers, converters, drop downs, carbon filters and vaporizer adapters for bongs and dab rigs.
- ✓ 10mm, 14mm & 18mm options
- ✓ Heat-resistant borosilicate glass
- ✓ Fast, discreet shipping
19 products
Glass Adapters for Bongs
Sale up to 25%
Vendor:
Boro Syndicate
Male to Female Drop Down Adapters
Regular price From $30.00 Sale price From $30.00 Regular price
Vendor:
Scientific Inhalations
SI Pipes Standard Carbon Filter Adapters
Regular price $38.00 Sale price $38.00
Vendor:
Aqua Lab Technologies
Male to Female Glass Adapter
Regular price From $24.00 Sale price From $24.00 Regular price
Vendor:
Scientific Inhalations
SI Pipes Carbon Filter with Metal Screen
Regular price $38.00 Sale price $38.00 Regular price
Vendor:
Aqua Lab Technologies
Male to Male Glass Adapter
Regular price From $20.00 Sale price From $20.00 Regular price
Vendor:
Aqua Lab Technologies
Female to Female Glass Adapter
Regular price $20.00 Sale price $20.00 Regular price
Vendor:
Boro Syndicate
Female to Female Drop Down Adapters
Regular price $40.00 Sale price $40.00 Regular price
Vendor:
Toxic Glass
Toxic Glass Male to Female Glass Bong Adapters
Regular price $9.99 Sale price $9.99
Sale up to 30%
Vendor:
Aqua Lab Technologies
45º Male to Male Adapter
Regular price $14.00 Sale price $14.00 Regular price
Sale up to 25%
Vendor:
Aqua Lab Technologies
45º Z Male to Male Glass Adapter
Regular price $15.00 Sale price $15.00 Regular price
Sold out
Sold out
Vendor:
Aqua Lab Technologies
Low Pro Reducer Glass Adapter
Regular price $15.00 Sale price $15.00 Regular price
Vendor:
Scientific Inhalations
SI Pipes 14/14mm Mini Carbon Filter Adapter
Regular price $38.00 Sale price $38.00
Vendor:
Scientific Inhalations
SI Pipes Ultra Carbon Filter Adapters
Regular price $38.00 Sale price $38.00Compatibility made simple
How to choose a glass adapter
For connection examples and clearance checks, read our bong joint size and accessory fit guide before selecting an adapter.
Check three things before buying: the joint size on each piece, whether each connection is male or female, and the angle you need. The correct adapter should connect securely without being forced.
Match male and female
A male joint fits inside a female joint. To join two female connections, choose a male-to-male adapter. To join two male connections, choose a female-to-female adapter. Match the size at each end as well.
Choose the angle
Straight, 45-degree and 90-degree adapters change clearance and orientation. Use a drop down when you need to move a bowl or banger away from the main joint.
Glass adapter compatibility chart
| Your setup | Adapter to look for | What it changes |
|---|---|---|
| 18mm female joint + 14mm male bowl | 18/14mm low-profile reducer | Joint size |
| 14mm female joint + 18mm male accessory | 14mm-to-18mm expansion adapter | Joint size |
| Two female connections | Male-to-male converter | Joint gender |
| Two male connections | Female-to-female converter | Joint gender |
| Banger sits too close to the rig | Drop down adapter | Clearance and position |
| Vaporizer needs water filtration | Device-specific glass adapter | Device connection |
Measure before ordering: product titles and variant selectors identify both ends of the adapter. Never force mismatched glass joints together.
Reducers vs. expansion adapters
A reducer lets a smaller accessory fit a larger joint. An expansion adapter lets a larger accessory connect to a smaller joint. Read dimensions in the order shown on the product page and confirm the male/female orientation before checkout.
- Low-profile reducers add minimal height
- Expansion adapters increase joint diameter
- Converters change joint gender
Using a drop down adapter
A drop down moves the heated accessory away from the body of a rig. This can improve clearance, change alignment and help keep reclaim farther from the main joint.
- Confirm joint size at both ends
- Check male/female orientation
- Allow glass to cool before removal
Glass Male to Male Adapter: Connect Two Female Joints
A glass male to male adapter has a male fitting at each end, allowing it to connect two compatible female joints. Check both joint sizes and the required angle before ordering.
Compare the male to male glass adapter and select the variant that matches both connections. An adapter adds height, so check clearance and stability too.
Female to Female Bong Adapter: Connect Two Male Joints
A female to female bong adapter fits over compatible male joints at both ends. It changes the connection gender; it only changes joint size when the selected model is specified to do so.
Shop the female to female glass adapter and confirm its measurements against your bong and accessory before buying. Never force a mismatched joint.
Care and stuck-joint prevention
Keep mating surfaces clean and dry. Insert adapters gently without twisting hard, support the glass close to the joint, and remove residue before it hardens.
- Never force an adapter into place.
- Let glass return to room temperature before cleaning.
- Use glass-safe cleaner and non-abrasive tools.
- Inspect adapters for chips or cracks before use.
Glass Adapter FAQ
How do I know which bong adapter size I need?
Identify the size and gender of both connections. Most glass joints are 10mm, 14mm or 18mm. The product variant must match both ends of your setup.
What is the difference between male and female glass adapters?
A male joint slides inside a female joint. An adapter can change gender when two parts otherwise have incompatible male or female connections.
Can I connect a 14mm bowl to an 18mm bong?
Yes, when the bong has an 18mm female joint and the bowl has a 14mm male joint, use an 18/14mm reducer designed for that orientation.
What does a drop down adapter do?
A drop down extends and lowers the accessory connection, adding clearance and moving heat and reclaim farther from the main joint.
Are glass adapters universal?
No. Compatibility depends on joint size, joint gender, angle and sometimes the specific device. Confirm every measurement before ordering.
How do I prevent a glass adapter from getting stuck?
Keep joints clean, avoid forcing or overtightening the connection, remove residue regularly and let heated glass cool before handling.