How To Measure Downstem Size and Buy a New Downstem - G2VAPE

How To Measure Downstem Size and Buy a New Downstem


The downstem is an essential part of a bong, and it is important to find the right one for your setup. Several factors matter when buying a new downstem: its length, material, and joint size.

Length is perhaps the most important factor in choosing a downstem. The downstem should extend from the bottom of the bowl into the water chamber so that smoke can be filtered and cooled before inhalation.

If the stem is too short or too long, it won’t function properly. Be sure to measure your bong’s height before buying a new downstem so you know what length to look for.

What is a Downstem Size

A downstem is a glass piece that fits into the joint of a water pipe or bong, creating an airtight seal. The bottom slits or holes cool and filter smoke before it reaches lungs. The downstem connects the water chamber to the outer world, keeping smoke in.

Downstems come in various shapes and sizes. They fit any water pipe or bong on the market today. They are usually made of glass or metal. But, silicone options are becoming popular. This is due to their durability and ease of cleaning.

When choosing a downstem for your water pipe, make sure it fits snugly. It should not have any sharp edges that can cut or damage your bong's walls.

Why is it Important to Get the Right Downstem?

When looking to buy a new downstem, measure its length and size. This way, you can find one that fits your smoking device.

Using a size guide for downstems can help you figure out what size will work best for your bong or pipe.

A short downstem may cause smoke to leak out. A long one might not fit your device's opening.

  • Improve the flow and filtration of smoke
  • Enhance the flavor of your smoking experience
  • Easily customize your pipe setup for different types of bowls or bongs
  • Can be used to adjust the height and angle of your bowl piece

Measuring for the Right Downstem Size

Measuring your downstem size is crucial when shopping or replacing it. This size depends on two things: joint size and stem length, which ensure a proper fit in your bong.

Determine Your Bong’s Joint Gender & Size 

The joint size is measured by its diameter, which corresponds to different joint sizes such as 14mm or 18mm. The standard male joint is 14mm while female joints are 18mm.

To measure the diameter of your downstem’s joint, use a ruler or caliper to find out how wide it is at its largest point.

Measure Your Bong’s Internal Height and Diameter 

The second measurement needed to find a compatible downstem is its length. Measure from the top opening (where it connects with the bong) to the end of the downstem.

With these two measurements, you’ll be able to determine whether a potential replacement stem will fit in your bong.

Consider Which Diffuser Setup You Want

When buying a downstem, there are different diffuser setups. They include slitted and non-slitted types.

Depending on which setup you prefer, make sure that it corresponds with what type of diffuser holes available in the downstem you choose.

Types of downstems

Once you know your bong’s joint size and gender, it is time to decide which type of downstem will best suit your needs. There are several types available including

  • Straight Downstems (for improved air flow without any extra attachments),
  • Bent Downstems (for an angled draw),
  • Angled Downstems (to reach further into corner pieces),
  • Diffused Downstems (with multiple slits cut into it for increased filtration),
  • Removable Downstems (easily taken apart for washing),
  • Fixed-Style Stemless Bongs (no removable parts at all),
  • Recycler & Multi Chamber Bongs (for filtration & cooling)
  • Percolator and Honeycomb Bong Attachments (to break up smoke particles).

Also, some downstems come with extra parts, like diffusers or percolators. Check if there is space for these in the design before you buy.

Choosing the Right Downstem for Your Bowl

Once you have measured your current downstem, think about any improvements. They could make your smoking better. If your downstem is too long, impeding airflow, try a shorter one instead.

Choose a diffuser or percolator type stem for better filtration and larger bubbles when smoking.

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