GULUNOOK 4L Stainless Steel Pet Water Fountain for Cats and Dogs
★★★★★ 4.8/5 | 10,000+ Real Customer Reviews

Fresh, Flowing Water.
Happier Pets.

Make everyday hydration more appealing with a 4L / 135 oz stainless steel fountain designed for cats and dogs.

💧
4L / 135 oz Less Refilling, More Fresh Water
💦
3 Flow Options Let Your Pet Choose Their Favorite
🧼
Multi-Stage Filtration Helps Keep Water Cleaner
🤫
Quiet Pump Less Than 30 dB
Give Your Pet a Better Way to Drink →
GULUNOOK 4L Stainless Steel Pet Water Fountain for Cats and Dogs
★★★★★ 4.8/5 | 10,000+ Real Customer Reviews

Fresh, Flowing Water.
Happier Pets.

Make everyday hydration more appealing with a 4L / 135 oz stainless steel fountain designed for cats and dogs.

💧
4L / 135 oz Less Refilling, More Fresh Water
💦
3 Flow Options Let Your Pet Choose Their Favorite
🧼
Multi-Stage Filtration Helps Keep Water Cleaner
🤫
Quiet Pump Less Than 30 dB
Give Your Pet a Better Way to Drink →
Limited-Time Offer
50% OFF
FREE 4 Replacement Filters + FREE Silicone Mat
Offer Ends In 00 : 00 : 00
Aqua Flow 4L Fountain

Aqua Flow 4L Fountain

$49.99 USD
Sale price  $49.99 USD Regular price  $99.99 USD
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Aqua Flow 4L Fountain

GULUNOOK Aqua Flow 4L Stainless Steel Pet Water Fountain

Fresh, flowing water for cats and dogs, with 4L capacity, 3 flow options, and multi-stage filtration.

10092 reviews

$49.99 USD
Sale price  $49.99 USD Regular price  $99.99 USD

🐾 Made for Cats & Dogs

A versatile fountain for multi-pet homes

💧 Fresh, Flowing Water

Encourages a more engaging drinking experience

🧼 Stainless Steel Design

Durable, easy to clean, and made for everyday use

🔇 Quiet & Low Maintenance

Below 30 dB with easy filter replacement

326 Pet Parents are choosing GULUNOOK right now
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3–5 Day Delivery

Ships from U.S. warehouse

30-Day Returns

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Product Details

• Capacity: 4L / 135 oz
• Material: SUS304 stainless steel drinking surface
• Suitable for: Cats & dogs
• Power: USB-powered
• Pump: Ultra-quiet, below 30 dB
• Flow Options: 3 interchangeable water flow styles
• Filtration: Triple filtration system
• Water-Level Protection: Automatic pump shut-off when water is too low
• LED Indicator: Blue for normal operation, red for low water

Filtration & Filter Care

Triple Filtration for Cleaner Water

The triple filtration system helps keep your pet's drinking water cleaner by using three filtration layers:

  • Resin: Helps reduce certain impurities from the water.
  • Activated Carbon: Helps reduce odors and improve water freshness.
  • Sponge: Helps catch hair, debris, and larger particles.

Filter Care

For best performance, rinse the sponge regularly and replace the filter as recommended based on your pet's usage and water quality.

Includes 4 Replacement Filters + 4 Sponges

Four replacement filters and four replacement sponges are included, so you can keep your fountain running with less hassle.

Replacement filters are also available separately.

Cleaning & Pump Care

Easy to Clean

The fountain is designed to be easy to take apart and clean. Regular cleaning helps maintain fresh water and consistent water flow.

  • Unplug the fountain before cleaning.
  • Remove the drinking tray and pump as needed.
  • Rinse and clean the fountain regularly.
  • Clean the pump regularly to help prevent buildup.
  • Rinse the sponge between filter replacements.

Important Pump Care Tip

Always unplug the fountain before adding water or changing the filter.

If the pump is briefly exposed to air during these routine steps, it may temporarily stop flowing. This is normal for a submersible pump and does not mean the pump is damaged.

To restore normal water flow:

1. Unplug the USB power cable.

2. Make sure the pump is fully submerged in water.

3. Plug the USB cable back in.

4. If needed, repeat the process a few times to release trapped air.

Tip: Do not run the pump dry.

3 Flow Options

3 Flow Options

Choose the Flow Your Pet Prefers

Every pet has different drinking preferences. Aqua Flow includes three interchangeable water flow options:

Stainless Steel Faucet

A smooth, steady stream for pets who enjoy drinking from a faucet.

Cat-Head Outlet

A gentler, lower-flow option for pets who prefer a softer stream.

Gentle Fountain Flow

A soft flowing fountain style that keeps water moving and inviting.

Simply switch the outlet to find the flow your pet likes best.

What's Included

Everything You Need to Get Started

  • 1 × 4L / 135 oz Stainless Steel Pet Water Fountain
  • 1 × USB Water Pump
  • 4 × Filter Cartridges
  • 4 × Pre-Filter Sponges
  • 4 × Pump Sponges
  • 1 × Stainless Steel Faucet Outlet
  • 1 × Cat-Head Outlet
  • 1 × USB Power Adapter
  • 1 × Connecting Tube
  • 1 × Silicone Mat
  • 1 × User Manual

Three Ways to Enjoy Flowing Water: Use the faucet outlet, cat-head outlet, or no outlet for a gentle upward fountain flow.

Ready to Use: Wash, assemble, add water, and plug it in.

Shipping & Returns

Fast, Reliable U.S. Shipping

  • Free U.S. Shipping on all orders.
  • Orders ship from our U.S. warehouse.
  • Tracking information will be provided after your order ships.
  • Delivery times may vary depending on your location.

30-Day Returns

  • We offer a 30-day return policy for eligible purchases.
  • If you're not satisfied with your purchase, please contact us within 30 days.
  • Items must be returned in accordance with our return policy.

Product Support

  • Received a damaged, defective, or incomplete product? Please contact us and we'll be happy to help.
  • If you have any questions about setup, cleaning, filters, or product use, our support team is here to assist you.
  • 5 stars: 8263 (82%)
  • 4 stars: 1829 (18%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
B
Bill G
Large Capacity, Easy To Maintain, And The Cats Like It

I have two cats, and my cats have 2 water fountains. I have replaced one of them with this. One of my cats loves to jump in the bathtub and try to drink out of the faucet. They both enjoy using their current fountains, but I think that she'll really like this one. I already appreciate it. The fountain was well protected in the box, and all parts were present and secure. Assembly was quick and easy (after a quick wash, of course) and the included instruction booklet was useful and informative. Two different spouts are included. I went with the "spigot" option but there's also an "owl" (looks like a cat to me) that will create a lower, gentler, waterfall effect. Once the filter was allowed to soak for the recommended 5 minutes, it and the sponge are placed in a compartment on the bottom of the drinking tray. They will be very easy to replace when the time comes, or to rinse between changes. The fountain comes with three extra sets of filters and sponges, and a quick search on Amazon yielded at least two inexpensive options to purchase more. Everything, including the pump motor, is easily disassembled so that all parts can be thoroughly cleaned when changing the filters. The pump is connected to the included USB power adapter by a 4 foot cord which exits, out of the way, through the back of the drinking tray. I filled the large reservoir with a measured amount of water so that I can track how often my cats are using it. They love drinking clean, flowing water, and this fountain will effectively supply it. They have both already checked it out, and it has definitely met with their approval. We are all very pleased.

S
Sean
Cat Approved and One of the Better Fountain Designs I��ve Used

Cat approved, which is really what matters most here. Our cat is one of those cats that pretty much demands moving water at this point, so a fountain is less of a luxury and more of a necessity. We��ve tried a few styles and this one has honestly been one of the better ones. What I like most is the stainless steel design. It feels cleaner, easier to maintain, and just more sanitary long term than a lot of the all-plastic fountains out there. It��s also easy to take apart and clean, which is a huge deal because if a pet fountain is annoying to maintain, you��re going to hate owning it pretty fast. The large water capacity is another big plus. Not having to constantly refill it is nice, especially if you have more than one pet or just don��t want to babysit it all the time. It also comes with extra filters, which is always appreciated and makes it feel like a more complete setup out of the box. One thing I actually liked that a lot of people may overlook is that it includes an extender so the pump can sit lower toward the bottom. That may sound minor, but it helps with one of the common issues these fountains have where the pump starts struggling once the water level drops too much. I still think the best long-term design would be a true bottom pump setup, but I do appreciate that they at least tried to improve on a common weak spot. If I could change one thing, I��d probably raise the overall height a few inches. For my cat it still works fine, and for cats and small dogs it��s definitely usable, but I do think just a little more height would make it even better ergonomically. Still, the important part is my cat loves it, drinks from it regularly, and I��m happy with how easy it is to keep clean and running. That alone puts it ahead of a lot of similar fountains.

S
Sammie K
Basil Says You Should Buy This

Our little buddy Basil is a big fan of this water fountain. Before this one, we had a plastic option that was separate from the base and he would knock it over all the time when it was getting low on water. Since getting this one, we don't have to worry about him knocking it over since the base is flat. Super easy to put all the piece together and wash parts in between use. The capacity it great and the overall design is lightweight when not filled with the 4L of water. Stainless steel feels high quality and feels the same as the others we use for the rest of the family. My favorite feature is the little blue light inside the water fountain so you can visually see the level of the water inside! Not only do the humans love this one, but our cat highly recommends this style of fountain. Pet approved! ?

E
Emily R.
All of my pets love drinking from this fountain! (Cats and dogs)

I got this water fountain for my cats because I thought it would help them drink more water. This water fountain was very simple to assemble and holds a large quantity of water. The fountain ran well on the first try, and I have had no issues with it since, even after several weeks of use. Both my 60-pound husky and my 3 cats love drinking from it! In all honesty, this is the most water I've ever seen any of them drink! The fountain is easy to refill and clean, unlike the plastic water fountains I've had in the past. I think the stainless steel makes a big difference! I only have to refill it about once or twice a week, and I know the water stays fresh for my pets. I highly recommend!

S
Shell A.
Kitty cats love it!

I am a pet caregiver and I like using stainless water fountains for when I am cat sitting. I use the fountain as a way to entice my kitty cats to drink more fluids while their humans are away. They love it! This is a nice LARGE fountain and runs quiet. I would recommend purchasing a straw brush for cleaning the spout if you do not already have one. The price for this fountain is great for the size!!

M
Mr. Fantastic
Great for Cats Once Running

This cat water fountain works well overall, but it does take a little patience to get started. It was somewhat tricky to assemble, and we had to fiddle with it a bit before getting the water to flow properly. Once everything was set up, though, our cats absolutely loved it and were much more interested in drinking. Hopefully, this keeps them out of the toilet, haha!

M
Mayor Esnupi
Happily shared between 2 very destructive cats

If you've used other cat water fountains, you'll be familiar with the process here. The setup was quick and includes a few extra filters. It begins to run immediately and requires AC power (which, even though it's USB, is provided. Nice!!). One of our cats puts her head sideways like a teenager and drinks from the spout. Another cat drinks normally but will often slap the water for, I don't know, looking at her funny. I have caught her with two (and once, three) paws in the water. I don't know what cats do all day, but that's above my pay grade. The filter runs quietly and without issue - I don't have the tools to test purity, etc., but I can say that cats prefer running water and will drink it more often when using a fountain like this one. Five stars!

K
Katie Z.
Perfect end-of-summer setup

Still running strong and keeping our pets hydrated smoothly as the weather transitions.

V
Valerie T.
Happy with the purchase

My cat uses it every day and the different outlet choices are useful. The 4L capacity is also great for our busy schedule.

M
Morgan L.
Happy with the fountain

My cat uses it every day and I like having several flow options. The 4L capacity is also great for our schedule.

A
Allison Taylor
Very happy with it

The 4L capacity, quiet pump, and different water outlets all work well for us. My cat took to it quickly and uses it every day.

N
Natalie C.
Happy with it

My cat took to it quickly and I like seeing her use the fountain throughout the day. The larger reservoir is very convenient.

N
Nathan R.
Puppy loves it

Our puppy started drinking from the fountain the first day. Now he goes over to it whenever he wants water.

A
Ashley M.
Fewer refills

I wanted something that would make the daily routine easier, and the 4L reservoir definitely does that.

D
Daniel F.
Great everyday fountain

It holds plenty of water, runs quietly, and both of my pets use it. So far it's been exactly what I was looking for.

M
Mark C.
Great size for two cats

The 4L reservoir has made a noticeable difference. I don't have to refill it several times a day anymore.

J
Julia P.
Quiet enough for nighttime

My cat uses the fountain overnight and the pump doesn't disturb us. The water sound is very subtle.

G
George P.
Nice stainless steel design

The stainless steel drinking surface is easy to clean and looks good. The cats have been using it every day.

E
Emma R.
Less mess around the bowl

My cat used to splash water while drinking. She seems to make much less of a mess with the fountain.

R
Rebecca M.
Easy to use

The setup was quick and the different outlet choices are nice. My cat settled on the faucet stream.

C
Chris T.
My dog loves the stream

He seems to prefer the running water to his old bowl. After playing outside, this is usually where he heads first.

L
Lauren C.
Great for busy mornings

I can fill the fountain before work and not worry about it for hours. Both cats use it throughout the day.

M
Michael R.
Happy with it

My cat uses it regularly and I like the larger capacity. It's been easy to add to our normal routine.

M
Mark R.
Great size for two cats

The larger reservoir has been a big improvement. I don't have to refill their water multiple times during the day.

A
Ashley T.
Less work every day

The fountain doesn't need constant attention, and the 4L capacity means fewer refills. It's been a nice convenience.

D
Daniel K.
Great everyday fountain

Quiet pump, plenty of water, easy setup, and my pets actually use it. Very happy with how it fits into our daily routine.

Frequently asked questions

1.About the Fountain
Q:Is this water fountain suitable for both cats and dogs?

A:Yes. The GULUNOOK 4L fountain is designed for both cats and dogs, making it a convenient choice for single-pet and multi-pet homes. The 4L / 135 oz capacity provides plenty of water for everyday use.

Q: How much water does the fountain hold?

A: The fountain holds up to 4L / 135 oz of water. Actual refill frequency depends on your pet's size, drinking habits, number of pets, and the surrounding environment.

Q: What is the fountain made of?

A: The drinking area is made with SUS304 stainless steel, paired with durable PC components. The stainless steel drinking surface is designed for everyday pet use and is easy to wipe and clean.

Q: Is the fountain noisy?

A: The USB-powered pump operates at less than 30 dB under normal conditions. Keeping the water level above the pump and cleaning the pump regularly can also help maintain smooth, quiet operation.

Q: Does the water flow continuously?

A: Yes. Once connected to power and properly filled with water, the fountain continuously circulates water. Simply disconnect the USB power when you want to turn it off.

2. Water Flow & Pet Use
Q: What are the 3 water flow options?

A: The fountain offers three flow styles: the stainless steel faucet, the cat-head outlet, and the top bubbling flow without an attachment. You can try different options to find the flow your pet prefers.

Q: What if my pet is afraid of the fountain or doesn't drink from it right away?

A: This can happen when a pet is introduced to a new fountain. Place the fountain near your pet's usual water bowl and allow them to explore it at their own pace. You can also start with the gentlest or most familiar-looking flow option. Avoid forcing your pet to use it.

Q: Can I use the fountain for multiple pets?

A: Yes. The 4L capacity makes it suitable for homes with multiple cats and/or dogs. For multi-pet households, check the water level more frequently and clean the fountain as needed based on usage.

3. Filters & Water
Q: Does the fountain come with filters?

A: Yes. Your fountain includes 4 replacement filter cartridges, 4 pre-filter sponges, and 4 pump sponges, giving you a starter supply for ongoing maintenance.

Q: What do the filters do?

A: The multi-stage filtration system helps reduce pet hair, debris, and unwanted odors from circulating water. The pre-filter and pump sponge also help capture larger particles before they reach the pump.

Q: How often should I replace the filters?

A: Filter life depends on water quality, number of pets, and how frequently the fountain is used. As a general guideline, replace the filter about every 3–4 weeks and replace it sooner if it becomes visibly dirty, discolored, or saturated with debris.

Q: Do I need to replace the filter if I use filtered or bottled water?

A: Yes. The fountain's filters are still useful for helping capture pet hair, debris, and other particles introduced during everyday use. Filtered or bottled water does not replace routine fountain maintenance.

Q: How should I prepare a new filter before using it?

A: Rinse the filter and pre-filter sponge with clean water before installation. Follow the filter instructions and make sure the filter is properly seated before starting the fountain.

4. Cleaning & Maintenance
Q: How often should I clean the fountain?

A: For best everyday maintenance, check the water and drinking area regularly and clean the fountain at least every 1–2 weeks. Homes with multiple pets or heavy shedding may need more frequent cleaning.

Q: How do I clean the fountain?

A: Unplug the fountain first. Empty the water, remove the filter and removable components, then clean the washable parts with water and mild dish soap. Clean the pump and pump opening to remove hair or debris, then rinse everything thoroughly and reassemble before refilling.

Q: Can I put the fountain in the dishwasher?

A: We recommend hand washing the fountain and its components unless a specific part is clearly identified as dishwasher safe in the product instructions. Do not place the USB pump, power adapter, or electrical components in a dishwasher.

5. Pump Troubleshooting
Q: Why did the pump stop flowing after I refilled the fountain or changed the filter?

A: If the pump is briefly exposed to air during refilling or filter replacement, it may temporarily lose its water flow. This is normal for a submersible pump and does not mean the pump is damaged.

Unplug the USB power, make sure the pump is fully submerged, then reconnect it. If needed, repeat the unplug/reconnect process 3–5 times and gently shake the pump while fully submerged to help release trapped air.

Q: What should I do if there is still no water flow?

A: First, make sure the water level is sufficient and the pump is completely submerged. Then unplug the USB power and check the pump, tubing, filter, and water outlet for hair or debris. Clean the pump if necessary and reconnect the power.

If the pump still does not work after these steps, please contact our support team at support@gulunookpet.com and we'll help you troubleshoot it.

Q: What should I do if the water flow becomes weaker?

A: A weaker flow is usually a sign that the pump, filter, or water path needs attention. Check the water level, clean the pump and pump sponge, make sure the filter is correctly installed, and remove any hair or debris from the water outlet.

Q: What happens if the water runs too low?

A: Do not allow the pump to operate without enough water. Keep the water level sufficient to fully submerge the pump and check the water level regularly. The fountain includes dry-run protection to help protect the pump when water becomes too low.

6. Power & Everyday Use
Q: Does the fountain need to stay plugged in?

A: Yes. The GULUNOOK 4L fountain uses a USB-powered pump and is designed for continuous operation while connected to power.

Q: Can I leave the fountain running overnight?

A: Yes. The fountain is designed for continuous circulation while powered and properly filled with water. For safe operation, keep the pump submerged and check the water level regularly.

Q: What type of water should I use?

A: You can use normal drinking water suitable for your pets. If your household has hard water, filtered water may help reduce mineral buildup inside the fountain and pump.

7. Orders, Shipping & Support
Q: How quickly will my order arrive?

A: Orders shipped within the U.S. typically arrive within 3–5 days after shipment. Delivery times may vary depending on your location and carrier conditions.

Q: Do you offer free U.S. shipping?

A: Yes. We currently offer free shipping on orders within the United States.

Q: What if I have a problem with my fountain?

A: We're here to help. If you have questions about setup, water flow, filters, cleaning, replacement parts, or your order, contact us at support@gulunookpet.com. Our support team aims to review and respond to all customer inquiries within 24 hours.

Q: What is your return policy?

A: We offer a 30-day return period. If you have an issue with your order or product, please contact our support team first at support@gulunookpet.com so we can help.

Keep Your Fountain Fresh

Stock up on replacement filters for your GULUNOOK 4L Pet Water Fountain.

GULUNOOK Aqua Flow 4L Fountain Replacement Filters (8-Pack)

GULUNOOK Aqua Flow 4L Fountain Replacement Filters (8-Pack)

GULUNOOK Aqua Flow 4L Fountain Replacement Filters (8-Pack)

$24.99 USD
Sale price  $24.99 USD Regular price  $49.99 USD