Two Ways To Chill
Using our XL Glycol Chiller for brewing can be simpler than it first appears. The key difference is not what the chiller does — its job is still to keep your glycol mixture cold and stable — but how that chilled glycol gets delivered to each fermenter.
Below, we break down the two most common installation styles in brewing: One Pump Per Fermenter and Glycol Loop.
Quick Take
- Great for brewers scaling from hobby setups into larger systems.
- Helps explain why a glycol loop can reduce clutter and simplify expansion.
- Our XL Glycol Chillers can work with both approaches.
- For more plug-and-play brewery loop setups, our Commercial Glycol Chillers may be the better fit.
What Is A Glycol Loop?
Brewers often ask whether they should use a glycol loop system or a dedicated pump for each fermenter. Both approaches can work well depending on brewery size, expansion plans, and cooling requirements. This guide explains the differences and how Penguin Chillers glycol chillers can support either approach.
We’ve seen a growing number of brewers interested in using our XL Glycol Chillers in their glycol loop setups — and we get it. It’s a great way to save some money upfront and expand at your own pace.
We’ve worked with brewers of all kinds — from home hobbyists to commercial-scale operations — and we want to help make your XL setup easier by explaining the two most common installation styles in brewing. One Pump Per Fermenter and Glycol Loop.
More importantly, we want to show how both are compatible with our chillers, and how one method might make life a whole lot easier, especially when you’re dealing with multiple fermenters.
If you’re specifically looking for more plug-and-play chillers with dedicated inlet/outlet ports designed for glycol loops, take a look at our Commercial Glycol Chillers. These are built with traditional brewery-style connections and are made for glycol loop setups in mind.
Two Primary Installation Styles
Before we dive into plumbing details, let’s clear up the basics: your chiller’s job stays the same no matter the setup. Its role is to keep your glycol mixture at a cold, stable temperature. The difference comes down to how glycol is delivered to each fermenter when it’s time to cool.
One Pump Per Fermenter
This is a straightforward setup that works well when you’re running just one or two fermenters — or even a small fleet.
- Each fermenter gets its own submersible pump.
- Those pumps are placed directly into the chiller’s reservoir.
- Each pump is plugged into a temperature controller that turns the pump on or off based on the fermenter’s needs.
Pros
- Simple to set up.
- Inexpensive and modular.
- Easy to expand one tank at a time.
Potential Frustration
- Lots of wires and hoses if you’re running more than a few tanks.
- Can get cluttered and hard to manage over time.
Glycol Loop
This system is what we recommend for more serious brewers managing multiple fermenters — or anyone who wants a cleaner, centralized solution.
- A single external pump pulls chilled glycol out of the chiller’s reservoir.
- It circulates glycol through an insulated loop of piping that runs to each fermenter and returns to the reservoir.
- Each fermenter has a solenoid valve controlled by a central control panel.
- The pump runs continuously, and the valves open/close as needed.
- Pro Tip: If the pump isn’t self-priming, you’ll need to fill the intake line manually during the initial setup — but re-priming usually isn’t needed unless you drain the system.
Pros
- Reduces equipment clutter — fewer pumps, fewer hoses, and less wiring overall.
- Centralized temperature management — easier to monitor and adjust glycol temperature for the whole system in one place.
- Improved system reliability — fewer moving parts may mean less maintenance overall.
Things To Know
- Requires a more involved initial installation and system design.
- Solenoid valves, pumps, and control systems are sourced separately or provided by tank manufacturers.
- Typically installed by a contractor or brewery equipment supplier.
- Flow balancing and pressure considerations are important when adding tanks or modifying the loop.
So Which Is Right For You?
Every once in a while, we hear from a brewer who tried to use a Penguin Chiller in a multi-fermenter setup and ran into challenges — too many hoses, not enough flow, or limited space and outlet options.
Most of the time, it turns out they were trying to chain together multiple fermenters without realizing a glycol loop would have solved their headaches.
Our chillers are absolutely compatible with glycol loop systems — but because we don’t sell solenoid valves, control boxes, or external pumps, this part of the setup is often left to the brewer or contractor to configure.
| Category | One Pump Per Fermenter | Glycol Loop |
|---|---|---|
| Best For | Homebrewers, one to a few fermenters, modular growth. | More serious brewers, multiple fermenters, cleaner centralized setups. |
| Upfront Complexity | Lower | Higher |
| Expandability | Easy to add one tank at a time, but clutter grows too. | Better long-term growth path when designed properly. |
| Equipment Clutter | Higher — more pumps, wires, and hoses. | Lower — more centralized and streamlined. |
| Control Style | Per tank using individual temp controllers. | Central loop with solenoid valves and control panel. |
| Typical Feel | Simple and modular. | Cleaner, more professional, and easier to manage as systems grow. |
Useful Parts Sources
You can find these parts online at places like:
- Automation Direct — more DIY and control focused.
- MoreBeer Pro — more plug-and-play focused.
Glycol Chiller Options
If you are interested in glycol chillers for brewing, explore our glycol chiller collection or contact us for help choosing the right setup.
See It In Action
Portly Gentleman Brewing Build
This video is a great real-world example from Portly Gentleman showing a glycol loop build using one of our chillers. We appreciate the shoutout and the positive feedback on Penguin Chillers.
It can be a helpful visual reference for how brewers may approach a loop-style setup, especially if you are trying to understand the overall concept before speaking with us.
Important note: this video is shared as a helpful reference, but not every detail will apply to every setup. Tank count, piping runs, flow requirements, ambient conditions, and components can all change what is best for your brewery.
Pro Tips For Setting Up A Glycol Loop
Pump Positioning
Place the intake line through the lid and into the chiller’s reservoir. If you’re using a self-priming pump, setup is a breeze. Place the return line on the opposite end of the reservoir from the intake line.
Tubing
Use insulated lines to prevent temperature loss.
Tank Compatibility
Many fermenter manufacturers offer pre-built systems with integrated valves and temperature sensors.
Scaling Up
Flow balancing and pressure considerations become more important as you add tanks or modify the loop.
Final Thoughts
Whether you’re cooling a single fermenter or managing a brewery full of tanks, Penguin Chillers are designed to grow with your setup. We support both the pump-per-tank method and the more advanced glycol loop systems used in commercial brewing.
If you’re feeling overwhelmed or unsure which route to take, feel free to reach out. We’re here to help you design a system that fits your workflow, your space, and your goals.
A glycol loop system offers centralized temperature management, making it easier to monitor and adjust fermenter temperatures for the entire setup from one place. It also tends to improve overall system reliability because it has fewer moving parts, like pumps, compared to having one pump per fermenter, which can reduce maintenance needs over time.
Contact Us Before Finalizing Your System
Disclaimer: This page is intended for general educational purposes only. Actual setup recommendations may vary depending on your fermenters, number of tanks, line lengths, pump choice, control hardware, glycol concentration, operating temperatures, and overall brewery design. Please contact Penguin Chillers before purchasing or finalizing a system so we can help align your setup with our recommendations.
Recommended Brewing Chillers
Whether you're cooling a single fermenter, a small pilot system, or a growing brewery, Penguin Chillers offers glycol chillers sized for a wide range of brewing applications. Choosing the right unit depends on fermenter count, batch sizes, ambient temperatures, and future expansion plans.
Standard Glycol Chillers
Ideal for homebrewers and small brewing operations.
XL Glycol Chillers
Designed for larger fermenters, multi-tank systems, and glycol loop installations.