How to Measure and Buy a Downstem

The right downstem is essential for getting the most out of your bong. Choosing the correct size and shape can be a difficult process, but this guide will help you through it. 

Learn how to measure the inner chamber, outer diameter and bowl size of your bong in order to find the perfect fit glass downstem for all your bong.

Measure the Bong’s Inner Chamber

Once you have determined the size of your bong’s joint, use a ruler or measuring tape to measure the length of the bong’s inner chamber. This measurement is important because it will determine Find The Right Downstem Size

The last thing you need to do is find a downstem that fits your measurements. If your inner chamber measured 4 inches, for example, then you would want to look for a downstem with a “4-inch” label. Also keep in mind that most downstems come in two different sizes: 14mm and 18mm. Make sure to get the right size for your joint!

Measure the Joint’s Outer Diameter

The next step is to measure the outer diameter of your bong’s joint. This measurement will tell you what size glass downstem to buy. The most common sizes are 10mm, 14mm and 18mm. 

It’s important that the joint you get is EXACTLY one of these sizes: wider joints obviously won’t fit and narrower joint won’t create the air-tight seal you need. You can use a caliper or an ID gauge to measure the outer diameter accurately.

Find the Right Bowl Size

The downstem you pick also depends on the type of male bowl you plan to use. Like joints, glass bowls come in 10, 14 and 18mm, so make sure to get the right size downstem for your bowl.

Pick a New Downstem

Now that you know the right size for your bong and bowl, all that’s left to do is pick a downstem! G2vape smoke shop online carries many different sizes and styles of glass downstems, as well as adapters and other accessories. Choose the one that best suits your needs and enjoy smoking from your custom-fit bong.