Frequently Asked Questions

At Cold Pro, we are committed to providing the best brewing experience possible with our products.  We've highlighted some frequently asked questions relating to our most popular products below.  If you have any additional questions, please don't hesitate to contact us!

What is the difference between this product and other commercial Cold Brew products?
The Cold Pro 2™ System allows for bigger batches, suspends grinds within the water rather than sitting on the bottom of the bucket, and has a structure that allows you to lift and rest the grinds in the permanent filter above the solution to drain. Because of the large capacity and our tested brewing ratio, there is only a 9% product loss within the soaked grinds versus up to a 30% loss with other brew methods. This brewing and filter system we use is superior to any other cold brewer on the market and makes for a much easier clean up as well!

How much Coffee can I make in one batch?
The Cold Pro 2™ can hold a maximum of about 7 gallons and produce a maximum of about 6.5 gallons. If you intend to make a RTD (ready to drink) brew, this is your maximum output but if you intend to make a concentrate, a 6.5-gallon batch could be diluted with 1:1 water, yielding 13 gallons from a single batch depending on how strong you want your brew.  The Cold Pro 4™ system can hold a total of 4 gallons with a maximum yield of about 3.5 gallons.

Which filters should I use?
Always use the permanent filter. This filter keeps the grinds suspended in the water the entire brew time and makes lifting and draining very easy. The paper filter is great to use in addition to the permanent filter for easier clean up. You can simply twist the bag closed and dump in your grinds bin or compost when you are done. Clean up is a piece of cake when both of these are used and your finished result is smooth. The outlet filter is intended for those who are putting their cold brew on nitro. It is a 5 micron filter, taking even more tiny particles out of the brew for the nitro tap to run smoothly; it is not necessary if you are not using a nitro tap.

What levels of filtration do each of the Cold Pro™ filters offer?
Each of the filters reduces the cold brew or concentrate down in succession. For smooth, refined cold brew or concentrate, and for ease of clean up, we highly recommend using the paper filter along with the permanent stainless steel filter (which must always be used with the Cold Pro™). If you are brewing for use in a nitrogen dispensing system, the cold brew or concentrate must be reduced to 5 microns.

  • The photo etched stainless steel filter in the permanent filter is approximately 100 micron
  • The paper filter is approximately 40 micron
  • The outlet filter is 5 micron

How often should I change the 5 micron outlet filter?
The answer to this question depends on if you are using paper filter or not and how fine your coffee grinds are.  There is no hard or fast rule, however when draining cold brew from the outlet becomes slow, it is time to change the outlet filter.

How often should I stir the coffee ​while brewing?
Stirring is not necessary but it does help evenly soak all the grounds before sitting overnight. Once you have lowered the permanent filter into the bucket and poured your remaining water on top of the grounds, let it sit for a couple minutes, then stir the grounds gently. After stirring you can let it sit overnight. You do not need to stir the coffee in the morning.

What are the dimensions of the brewing vessels that can be used with the Cold Pro™ permanent filter?
The Rubbermaid® Brute® 10 gallon bucket is 17" tall with a 16" diameter. The Carlisle® Bain Marie™ 22 qt bucket is 15½" tall with a 12¼" diameter. The Curtis® 10 gallon stainless steel dispenser is 29” tall with a 13” diameter. Product dimensions are available on the respective product pages in the Cold Pro™ System section of our website.

What recipe should I use for Cold Brew?
This is a great question, because there are many ways to make cold brew. We suggest starting with this recipe and tweaking it to make it your own if you so wish. A recipe that we are very happy with is making 6 gallons of ready to drink cold brew using 3 lbs. of grounds and letting this steep overnight for 16 hours. Fill the bucket with 3 gallons of filtered water to the pre-fill line, place paper filter into the permanent filter and add 3 lbs. of coarsely ground beans, set inside bucket with adapter ring in place, add an additional 3 gallons of water to the grounds. Close bucket and wait 16 hours. Drain into a sealed container and refrigerate your cold brew, it should stay fresh for 2 weeks.

For a high yield, we recommend a concentrate recipe that also is delicious. Seven pounds of coarsely ground coffee with 7 gallons of water to steep overnight. This makes a concentrate that can be left strong and diluted with each varying order or cut with equal parts water in bulk once the batch is ready to drain, totaling almost 14 gallons of fresh cold brew.

Because of the diverse profiles of bean varietals and brewer’s preferences, we recommend starting with one of these recipes and tweaking it to make it your own.

What grind setting should I use for my beans?
The best grind for cold brew made with the Cold Pro™ is the coarsest grind, or 1 notch coarser than your French press setting. We have a MAHLKÖNIG® Kenia grinder and use the #20 setting. A coarse grind allows for less surface area and a slower steeping process. Too fine of a grind can result in over-steeped grounds.

The flow of concentrate through the felt outlet filter is incredibly slow. After allowing the grounds to drain, I open the faucet and it can take up to 2 hours to empty from the bucket. Why is it so slow?
Most likely there are grounds blocking the finishing filter or dispensing spigot. This can occur when the initial bloom causes the grounds to crest the edge of the permanent filter. Using a paper filter will greatly reduce that likelihood.

We have also found that if the brew vessel is filled with water to the Pre-fill line, then grounds are added to allow for a pre-infusion bloom, the final bloom is not as drastic when the remaining water is added.

The instructional video says that I should add water up to the Pre-fill line, but I’m using a Carlisle bucket (or Curtis dispenser) and there is no Pre-fill line. How much water should I add to start?
The initial amount of water for each different brewing vessel is:

  • Rubbermaid® Brute® 10 gallon bucket: up to the Pre-fill line (approx. 3 gallons or 11.5 liters)
  • Carlisle® Bain Marie™ 22 quart bucket: approx. 2 gallons or 7.5 liters
  • Curtis® TC-10H stainless steel dispenser: approx. 3 gallons or 11.5 liters

I can’t get the lid to snap into place on my Cold Pro™ system while I am allowing it to steep. Does it need to be sealed?
The lid does not need to be securely snapped into place while steeping. We recommend that users place the lid on top of the various systems simply to prevent anything from falling into the cold brew while steeping.

How do I clean the Cold Pro™ equipment?
Cleaning the Cold Pro™:

  1. Dispose of the paper filter and coffee grounds.
  2. With the adaptor ring and permanent filter still in place, fill and drain the brew vessel with cold water to rinse it.
  3. Fill the brew vessel with cold water again and add one scoop (or one trial size sachet) of Cafetto® Cold Pro™ Cleaner.
  4. Allow to sit for one hour.
  5. Drain the cleaning solution.
  6. Fill the brew vessel with cold water again and drain to rinse it.

Can I re-use the outlet filter?
Yes, you can reuse the filter, but make sure you wash it thoroughly by running clean water through the filter and letting it dry in a clean location.

Do I need to refrigerate while brewing?
No, sitting at room temperature will work just fine. Refrigerating it will slow the brew process.

How should I store the cold brew? How long will it keep?
Dispense your cold brew from the Cold Pro™ into containers that can be sealed and refrigerated. The brew should stay fresh for 2 weeks as long as it has been refrigerated the entire time.

Do I just use cold water or can I use ​hot water?
Use cold or room temperature water. Hot water will heat the grounds and change the flavor by bringing out more oils and acids.

Can the cold brew be heated and served hot?
Yes, but we do not recommend this. Cold brew coffee is unique because it never gets heated and hot water is never used. This minimizes the acidity and heating the cold brew will change the molecular structure of the coffee.

The stainless portion of the permanent filter on my Cold Pro™ System is wrinkled. Did it get damaged in shipping?
No, your permanent filter is not damaged. The photo etched stainless steel portion is over molded with polypropylene (plastic). When the piece is removed from the injection molding machine, the polypropylene cools and shrinks slightly while the stainless steel does not. This shrinkage causes the stainless steel to wrinkle, but it will not affect the functionality of the permanent filter.

Are the components of the Cold Pro™ systems certified food safe?
Yes. All proprietary components of the Cold Pro™ have been certified food safe by SGS, the world's leading inspection, verification, testing and certification company. For more information about food contact testing performed by SGS, follow this link: http://www.sgs.com/en/agriculture-food/food/food-contact-tests

Test reports are available here:

Additionally, the three current Cold Pro™ brewing vessels; the Rubbermaid® Brute® 10 gallon bucket, Carlisle® Bain Marie™ 22 quart container, and the Curtis® TC-10H stainless steel dispenser are all NSF certified.

What is the smallest amount of cold brew I can make with my Cold Pro™ Brewing System?
The smallest amount we've been able to brew with the Cold Pro 2™ system is 4 gallons (15 L) water with 2 pounds (0.9 kg) of coffee. That is the lowest level we've attained while still keeping the grounds submersed. This is a recipe for ready to drink cold brew, not a concentrate. Using this recipe you can expect to yield between 13 and 13.5 liters of ready-to-drink cold brew coffee.


Can't find the answer you're looking for? Contact us with your questions about any of our products. We are here to help!