Double Spout Carboy Cap – Orange (Universal Fit)

This double spout carboy cap is one of the most versatile pieces of equipment you can have in your setup. Made from flexible, BPA-free material, it stretches securely over the mouth of 3, 5, and 6 gallon carboys, creating a tight seal without the need for a stopper or bung.

What makes this cap so useful is the dual opening design. Each port can be used for different purposes, allowing you to connect tubing, insert an airlock, or run a racking cane—all at the same time if needed. Both openings come with caps, so you can seal them when not in use.

Why You’d Use It

This cap gives you more control and flexibility than a standard bung. Instead of working around a single hole, you can configure your setup however you need.

It’s especially useful for:

• Running a blow-off tube during active fermentation
• Connecting transfer lines for racking or closed transfers
• Adding an airlock while still having a second access point
• Creating cleaner, more controlled workflows

Once you start using one, it tends to replace multiple small pieces of equipment.

Practical Uses

One of the most popular uses is starting a siphon. Insert your racking cane into one opening, then gently blow into the other. The added pressure pushes liquid up the cane and gets the siphon going quickly and cleanly, without shaking or lifting your vessel.

It’s also great for handling vigorous fermentations. You can attach a blow-off tube to one port and direct it into a separate container, preventing messy overflows. With a bit of setup, you can even use it to capture yeast from active fermentation for reuse.

Because it’s flexible, it works easily with a wide range of tubing sizes and equipment, making it a great tool for experimenting with different setups.

Key Features

• Fits 3, 5, and 6 gallon carboys
• Dual ports for tubing, airlocks, or racking canes
• Includes caps for both openings
• Flexible, tight-sealing design
• BPA free
• Reusable and easy to clean

If you’re looking for a simple upgrade that adds a lot of flexibility to your fermentation setup, this double spout carboy cap is an easy choice. It solves multiple problems at once and makes your process smoother from start to finish.