Berkey Sight Glass Spigots (How They Work + Installation Guide)

What are Berkey sight glass spigots and how do they work?

Berkey sight glass spigots are specifically designed for stainless steel systems like the Travel, Big, Royal, Imperial, and Crown Berkey.

They allow instant reading of water level in the lower chamber—no more guessing or lifting the lid.

You don't need this with the Berkey Light because you can already see through the shatter-resistant, BPA-free copolyester body.

Three Different Sizes of Berkey Sight Glass Spigots

There are three different sizes of Berkey sight glass spigots, depending on your system size:

• 7.5 Inch – For the Travel and Big Berkey
• 10 Inch – For the Royal and Imperial Berkey
• 13 Inch – For the Crown Berkey

Choosing the correct size ensures accurate water level readings and proper fit.

How to Install a Berkey Sight Glass Spigot

Installing a Berkey sight glass spigot is quick and requires no tools.

Wash hands and the spigot with mild dish soap before starting. Rinse thoroughly.

Place one black rubber washer over the threads of the spigot. Insert the threaded stem through the hole in the lower chamber.

Place the second washer on the inside and secure with the spigot nut. Tighten by hand only.

Tip: Hold the nut in place and rotate the spigot until tight, then align the sight glass upward.

For the 13" model, install the included brace for added stability.

A small piece of Velcro is included—attach it to secure the sight glass in place.

Why Many Users Upgrade to Stainless Steel Spigots

Many Berkey users choose to upgrade to stainless steel spigots for improved durability, longevity, and a cleaner look.

Compared to standard spigots, stainless steel options are more resistant to wear and provide a premium feel that matches your system.

If you're already upgrading your setup, it’s a small change that can make a big difference in long-term use.

Cleaning Instructions for Berkey Sight Glass Spigots

Regular cleaning ensures fresh, great-tasting water.

1. Empty both chambers and remove the spigot by unscrewing the wing nut.

2. Carefully disassemble the sight glass, keeping track of washers.

3. Remove the lever and internal rubber seat if needed.

4. Wash all parts in hot soapy water. Optionally sanitize with mild chlorine or iodine solution.

5. Rinse thoroughly and reassemble.

Note: Do not place sight glass spigots in the dishwasher.

To view the full printable instructions, click here.

Common Questions About Berkey Sight Glass Spigots

Do I need a sight glass spigot?

No, but it makes monitoring water levels much easier and more convenient.

Are sight glass spigots compatible with all Berkey systems?

They are designed for stainless steel Berkey systems only—not the Berkey Light.

Do they affect filtration?

No, they only replace the spigot and do not impact filtration performance.

Final Thoughts

If you’ve ever had to open your Berkey just to check the water level, you already know the inconvenience.

Berkey sight glass spigots solve that problem instantly by giving you a clear visual indicator at all times.

For most users, it’s a simple upgrade that improves daily use and makes your system more efficient.

If you’re already investing in a stainless steel Berkey system, adding a sight glass spigot is an easy decision.