If you’ve ever stood in an office break room, café, or gym grabbing a quick coffee or cold soda from a drinks machine, you’ve probably never stopped to think about the water tank inside it. But as a drinks machine supplier, I get questions about this all the time—from business owners wondering how often they’ll need to top up, to people curious about what goes into keeping those machines running smoothly. Today, let’s break down the average capacity of a drinks machine’s water tank, why it matters, and how we size our machines to fit all kinds of spaces. Drinks Machine
First, let’s be clear: there’s no one-size-fits-all number here. The average depends almost entirely on what type of machine you’re talking about, where it’s installed, and how many people use it. I’ve worked with everything from small countertop machines for a 10-person startup office to large floor-standing machines that serve a busy university dorm with 500+ students, and the difference in their water tanks is night and day. Let’s start with the most common types, because that’s where most people’s questions start.
Countertop drinks machines—those smaller, compact ones you see in tiny offices, waiting rooms, or even break rooms in small retail stores. These are designed for low to medium use, right? Like, maybe 10 to 50 uses a day. For these, the average water tank is usually between 2 and 5 liters (that’s about 0.5 to 1.3 gallons, for the US folks reading). Wait, let me give you a real example: last year, a small marketing firm here in town ordered 12 countertop instant coffee machines for their team. Their old machine had a 2-liter tank, and they were refilling it twice a day—once at 8 a.m. and once around noon. That made sense, since most of their team grabs coffee in the morning and a midday pick-me-up. We upgraded them to a 4-liter tank, and now they only need to top it up once a day, which cut down on their maintenance time. That’s a key point: the tank size is directly tied to usage, and small countertop models are built for minimal upkeep.
Then there are the mid-range machines—those floor-standing ones you see in medium offices, small cafes, or gyms. These get way more use, like 50 to 200 servings a day. For these, the average water tank jumps up to 10 to 20 liters (2.6 to 5.3 gallons). I can tell you from experience: a gym we supply downtown has a 15-liter tank in their mid-range hot and cold drinks machine. That gym is open from 6 a.m. to 9 p.m., and on weekdays, they get about 120 uses a day—members grab water, iced coffee, or hot tea. They refill the tank every other day, which works perfectly for them. If we’d put a 5-liter tank there, they’d be refilling it three times a day, which is a hassle for their front desk staff. That’s why when we talk to a customer, the first question we ask is “how many people will use this, and how often?”
Now, the big ones—the high-volume machines, usually found in universities, large corporate campuses, event spaces, or busy public transit hubs. These can have 50, even 100 liters (13 to 26 gallons) or more. I recently supplied a large university student union with two high-volume cold beverage machines, each with a 75-liter tank. Why so big? Because during lunch, that machine serves over 300 students an hour, all grabbing bottled water, iced tea, or sports drinks. If they had a smaller tank, it would run empty mid-lunch rush, which is a nightmare for both the university and the students waiting in line. We also installed an automatic top-up connection on those units, so they don’t have to manually refill the tank at all—they just hook into the building’s water line, which is a game-changer for high-traffic spots.
Wait, but let’s not forget about specialty machines. Like, what about the coffee vending machines that make lattes and cappuccinos, or the ones that dispense hot chocolate and soup? Those usually have a separate water tank, but it’s sized similarly to mid-range models, because even though they’re making more complex drinks, the water per serving is about the same. A latte uses around 150ml of water, same as a regular coffee, so a 15-liter tank would make 100 lattes, which is still about a day’s use in a small café.
Now, why does this matter to you, if you’re a business owner looking to buy a drinks machine? Let’s be honest: getting the tank size right saves you time and money. If you get a tank that’s too small, you’re constantly refilling it, which means more work for your staff, possibly longer lines for your customers, and even lost revenue if the machine runs empty during peak hours. If you get a tank that’s too big, you’re wasting money on a machine that’s unnecessarily large—it’ll cost more upfront, and take up more space in your break room. I’ve had customers come to me after buying a machine online (not from us, obviously) with a 20-liter tank for their 15-person office. They thought bigger was better, but that machine is too bulky for their small break room, and they’re wasting energy heating and cooling extra water they never use. So it’s a balance.
Let’s talk about some industry data to back this up, because as a supplier, we rely on real numbers, not just guesswork. A 2022 report from the National Automatic Merchandising Association (NAMA) found that the average water tank capacity for countertop instant beverage machines in office settings is 3.8 liters (that’s right around 1 gallon), for mid-range floor-standing machines it’s 14.2 liters (3.75 gallons), and high-volume machines average 68 liters (18 gallons). That lines up with what we see in our own business—we adjust our inventory based on that data, because we know what our customers actually need.
Another thing to consider: water tank design. A lot of people don’t realize that the tank isn’t just a big plastic box—there’s insulation, heating elements, and filters inside, which can take up space. So a machine that looks like it has a 5-liter tank might actually have an effective capacity of 4 liters, because of the internal components. That’s why we always tell customers to check the “usable capacity” not just the listed size—because that’s the amount of water you can actually use, not the total space the tank takes up.
We also make sure all our tanks are food-grade, of course. No one wants their drinks to taste like plastic, right? That’s a big part of why we choose our materials—they’re BPA-free, easy to clean, and don’t leach chemicals into the water. Cleaning frequency also ties into the tank size. Smaller tanks need to be cleaned more often, because they get refilled more, which can lead to bacteria growth if not maintained. But our larger tanks have self-cleaning cycles, which help prevent that, so even with more water, they stay safe.
Let’s run through a quick example to make this concrete. Say you’re a small retail store with 20 employees, plus 50 customers a day stopping by for coffee. What size tank do you need? Let’s calculate: each coffee uses ~150ml of water, so 70 total servings a day is 10.5 liters. That’s right in the middle of our mid-range tank sizes—10 or 12 liters would work perfectly. You’ll refill it once a day, maybe twice on a busy Saturday, and you won’t have to worry about it running empty. If you went with a 5-liter tank, you’d be refilling it three times a day, which is a pain. If you went with a 20-liter, you’re paying for more space and capacity you don’t need.
Now, I know some of you might be thinking, “What about machines that plumb into the building’s water line? Do they even have a tank?” Yep, they do—usually a smaller buffer tank, around 1 to 3 liters, to make sure there’s a steady supply of water to the machine’s components, even if the building’s water pressure fluctuates. So even plumbed machines have a water tank, they just don’t need manual refills, which is great for high-traffic spots.
As a supplier, we test every machine before it leaves our warehouse, checking the water tank capacity, flow rate, and temperature control to make sure it meets industry standards. We also customize tank sizes for customers who have unique needs—like a small café that wants a 6-liter tank instead of the standard 10, or a sports arena that needs a 100-liter tank for event days. We don’t just sell machines; we work with our customers to find the right fit for their space and usage.
Wait, let’s address a common misconception: a lot of people think bigger tanks mean more servings, but that’s not always true. The number of servings also depends on the machine’s water efficiency. Some newer machines use less water per serving—like, 120ml instead of 150ml for a coffee—so a smaller tank can actually hold more servings. That’s a big part of our newer models, too—we’ve upgraded our machines to be 15% more water efficient than they were 5 years ago, which means customers can get more servings from a smaller tank, saving them money on water bills over time.
Another point: maintenance. If you have a machine with a large tank, you’ll need to descale it less often, right? Because there’s more water, so minerals from the water are spread out more. But if you have a small tank, you might need to descale every 2 months, whereas a large tank might only need it every 6 months. That’s another factor to consider when choosing a tank size—less maintenance means less downtime for your machine, which is better for business.
I’ve had a few funny stories over the years that illustrate how important tank size is. Once, a customer ordered a high-volume machine for their office, thinking it would fit in their break room. It had a 70-liter tank, but their break room was only 8 feet wide—they had to send it back and switch to a mid-range machine with a 15-liter tank, which was a better fit. Another time, a gym owner complained that their machine was running empty every day, until we realized they were using it to serve water to their entire youth sports team after practice—so we upped their tank from 12 liters to 20 liters, and that fixed the problem. Those stories stick with me, because they remind me that it’s not just about numbers—It’s about understanding what each customer actually needs.
So, to wrap this up: the average water tank capacity of a drinks machine depends on three main things: 1) machine type (countertop, mid-range, high-volume), 2) usage level, and 3) installation space. For countertop machines, average is 2-5 liters; mid-range floor-standing, 10-20 liters; high-volume, 50+ liters. But that’s just a baseline—we always tailor it to the customer, because one size never fits all.
If you’re in the market for a drinks machine, whether for a small office, a busy café, or a large event space, don’t just guess at tank size. Reach out, tell us about your space, how many people will use the machine, and what kind of drinks you want to serve. We’ll help you find the right tank size that saves you time, money, and hassle.
Spiral Mixer References:
- National Automatic Merchandising Association. (2022). “2022 Vending Equipment Industry Trends Report.”
- Beverage Dispensing Equipment Manufacturers Association. (2021). “Food-Grade Tank Standards for Commercial Drinks Machines.”
- Commercial Kitchen and Office Equipment Association. (2023). “Water Efficiency Guidelines for Vending and Dispensing Machines.”
Hangzhou Joy Kitchen Equipment Co., Ltd.
As one of the most professional drinks machine manufacturers and suppliers in China, we also support custom service. We warmly welcome you to wholesale advanced drinks machine from our factory. If you have any enquiry about cooperation, please feel free to email us.
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E-mail: tyler@equipmentjoy.com
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