Water pipes & bongs
by EHLE
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The Screen Notch Bowl is a borosilicate glass bowl piece by EHLE that uses a precision-machined groove to hold a standard flat pipe screen firmly in place. If you've ever had a screen pop loose mid-light and sent a hot ball of ash straight into your water pipe, you already know why this exists. Available in 14.5 mm and 18.8 mm joint sizes, it drops straight into any standard ground glass bong or water pipe for an airtight, wobble-free fit.
Measure the female joint on your water pipe — that's the opening the bowl slots into. A 14.5 mm joint is roughly the diameter of your little finger; an 18.8 mm joint is closer to your index finger. Still not sure? Pull out your current bowl piece and check the stamp on the joint. Most standard-size bongs from EHLE, Weed Star, and similar brands use 18.8 mm. Smaller or more portable rigs tend to run 14.5 mm.
| Variant | Joint Size | SKU | Best For |
|---|---|---|---|
| 14.5 mm | 14.5 mm male joint | HS1227 | Smaller bongs, bubblers, compact rigs |
| 18.8 mm | 18.8 mm male joint | HS1228 | Full-size bongs, beaker bases, straight tubes |
The EHLE Screen Notch Bowl is made from borosilicate glass with a ground male joint available in two standard sizes. Below is the full spec breakdown.
| Spec | Value |
|---|---|
| Brand | EHLE |
| Material | Borosilicate glass |
| Joint type | Male, ground glass |
| Available sizes | 14.5 mm / 18.8 mm |
| Key feature | Engineered screen notch groove |
| Screen compatibility | Standard flat pipe screens |
| Category | Water pipe bowls / Bong accessories |
Complete your setup: grab a pack of Steel Pipe Screens in the right diameter so you've got spares on hand — screens wear out faster than you'd think, especially if you're cleaning with a lighter flame. If your water pipe could use a general refresh, a set of Bong Cleaning Plugs and some Isopropyl Cleaning Solution will have the glass looking brand new in minutes. You might also want to browse the Bong Bowls and Accessories category for downstems and adapters that pair well with EHLE glass.
A screen notch bowl addresses the single most common frustration with standard glass bowls: screens that shift, tilt, or pop out during use, letting ash and herb pull straight through into your water pipe. Here's how that problem usually plays out.
Standard bowl pieces have a flat bottom with a hole (or a few holes). Drop a screen in and it sits there loosely. Poke at your herb with a lighter or a poker tool and the screen tilts. Pack the bowl a bit too firmly and the screen gets wedged at an angle. Over a few sessions, the screen warps from heat and stops sitting flat altogether. The EHLE Screen Notch Bowl addresses this with a single design change: a machined groove that the screen edge clicks into. The screen stays level, stays centred, and doesn't shift when you're loading or lighting. It's a small detail, but it's the kind of thing that makes you wonder why every bowl piece isn't built this way. According to harm-reduction guidance from the EMCDDA, using proper filtration and well-maintained equipment is a basic step toward reducing the intake of combustion byproducts when smoking through water pipes.
One honest note: this bowl doesn't come with screens included. You'll want to pick up a set of flat brass or stainless steel pipe screens in the correct diameter. The groove is designed for standard round screens — nothing proprietary, nothing expensive. Also, because the notch holds the screen so firmly, you might need a poker or paperclip to pop the screen out when it's time for a swap. That's the trade-off for a screen that actually stays where you put it.
Using the screen notch bowl takes about 30 seconds to set up and requires no tools beyond a standard flat pipe screen and your water pipe. Follow these steps.
EHLE's Screen Notch Bowl is a well-made, single-purpose upgrade that does exactly one thing and does it properly — it keeps your pipe screen seated and level. We've sold EHLE glass since the early days of the shop. German-made, no-frills, built to spec. The joint on this bowl piece is ground with tight tolerances — you can feel the difference when you twist it into a downstem compared to a cheaper import bowl that rattles around. The glass itself has a solid weight to it; it doesn't feel fragile in your hand. That said, it's still glass. Drop it on tiles and it's done. Order a spare if you're clumsy before your morning coffee.
Compared to a standard EHLE bowl without the notch, this one costs a bit more but saves you the hassle of constantly readjusting your screen. If you've been using the old trick of bending screen edges down to wedge them in place, you can stop — the notch does a better job and keeps the screen perfectly flat, which means more even airflow across the bowl. We tested it side by side with a generic Chinese-made bowl piece from our bargain bin: the generic bowl's joint had visible play when seated, and the screen sat crooked from day one. The EHLE sat flush, sealed tight, and the screen clicked in with an audible snap. For a bowl piece you'll use daily, the build quality difference is obvious.
One limitation worth mentioning: the notch is sized for standard flat round screens. If you prefer glass jack screens or daisy-style screens, they won't seat in the groove — you'll need to stick with flat mesh. That's not a dealbreaker for most people, but it's worth knowing before you buy.
No. You'll need to buy flat pipe screens separately. Standard brass or stainless steel screens in the appropriate diameter work perfectly with the notch groove.
Yes — 14.5 mm and 18.8 mm are universal ground glass joint sizes. Any water pipe with a matching female joint will accept this bowl, regardless of brand.
These refer to the outer diameter of the male joint. 18.8 mm is the standard size for full-size bongs. 14.5 mm fits smaller rigs and bubblers. Measure your bong's joint opening or check the specs from your bong's manufacturer.
Swap it out when you notice restricted airflow or the screen is visibly clogged and no longer responds to cleaning. For regular use, that's roughly every 1–2 weeks. Stainless steel screens last longer than brass.
Technically yes, but then you lose the whole point. Without a screen, herb and ash pull straight through the hole into your water pipe. The notch is specifically designed to hold a screen — use one.
Not particularly. A 20-minute soak in isopropyl alcohol loosens resin from the groove. A thin poker or paperclip helps clear any residue. It's no harder to clean than a standard bowl — just one extra ridge to pay attention to.
EHLE is a German manufacturer known for precision ground joints and consistent borosilicate quality. The joint tolerances are tighter, so you get a better seal with less wobble. For a bit more, you get glass that fits properly and lasts.
You can order the Screen Notch Bowl directly from Azarius in either 14.5 mm or 18.8 mm. Get the matching pipe screens at the same time so you're ready to go out of the box.
Last updated: April 2026
