24 mm downstem


Are you looking for a downstem to complete your waterpipe setup? Downstems come in a variety of sizes, so getting the right size is important! Biohazard Inc. will guide you in finding the perfect downstem fit with three simple steps!

What you will need:

  • Ruler
  • A pencil (but any thin, straight object will do)
  • The waterpipe
  • A dime (if needed)
Step 1: Measure the waterpipe’s inner chamber

Insert a pencil into the waterpipe’s female joint opening. Leave about a half-inch of space between the pencil and the bottom of the waterpipe’s base. Mark the pencil where the end of the joint meets the inside of the waterpipe.

Step 2: Measure the length of the downstem

Measure the length (in inches) from the mark to the tip of the pencil. This is the length of the downstem you will need.

Note: Biohazard Inc. follows the industry standard of measuring our downstems from the end of the ground joint to the tip of the downstem.

Step 3: Measure the inner diameter (ID) of the female joint

Measure the width of the inner diameter of the female joint in millimeters. The three most common joint sizes are 10mm, 14mm, and 19mm.

Rule of thumb: A dime fits through a 19mm joint. A pencil fits through a 14mm joint. If a dime or pencil can’t fit through the joint, then it is likely a 10mm joint.

Once you figure out the downstem length and joint inner diameter, you are ready to shop for a new downstem!

We offer wholesale glass downstems available in many sizes and colors. We carry 14mm, 19mm, 18mm in all 2", 3", 4", and 5". Many more items relating to downstems, waterpipes, and bongs on our Master Catalog. We're located in Los Angeles, California. Free Shipping on orders over $500


Purchase a Glass Downstem for Your Bong

If you’re looking for a bong stem with plenty of airflow, we have you covered. At Thick Ass Glass, you’ll find the best bong downstem selection online. These highly-durable and smooth glass downstems are perfect for your water pipes and dab rigs. From our 5 Arm Glass Downstem and Closed-End Multiplying Showerhead Downstem to our Titan Stem Aluminum Metal Adjustable Length Downstem, our products are unrivaled. And, to fit each unique bong, each glass downstem we sell is made with varying joint measurements, from 18/18MM to 18/14MM.

How to Shop for a Downstem

If you’re interested in purchasing a glass downstem, there are some important things to consider prior to purchasing. Make sure you think about the following questions before adding one to your cart:

“What Size Downstem Should I Order?”

Generally, a bong downstem will have a joint size of 14MM, 18MM or even 10MM. The joint size must be a snug fit that keeps an air-tight seal while smoking. However, you should also consider the length of the bong downstem itself. Your downstem should be long enough to hit the water and produce bubbles upon inhalation. If it also hits the base of the bong, this is too long and you won’t get the same effects from using the right size.

“Should I Order a Downstem Diffuser?”

A diffuser is optional, but it can attach to your downstem to produce smaller bubbles. These tiny bubbles create smoother draws, so you can enjoy each puff with less harsh results.

“Can My Water Pipe Use a Downstem?”

If you have a pipe with a male joint, you cannot add a downstem. These will only fit into bongs with female joints.

Don’t skimp out on subpar quality– our TAG downstem products are designed for reliability and customer satisfaction. Shop our bong stem inventory today!

Purchase downstem & bong stem products online at Thick Ass Glass. Whether you're interested in buying a glass bong downstem or titan-stem aluminum metal downstem, you can't go wrong with our high-grade products!