

🚀 Elevate your industrial flow game with unstoppable power and durability!
The Happybuy Air-Operated Double Diaphragm Pump features a 1-inch inlet/outlet, aluminum alloy housing, and premium nitrile diaphragms. It delivers up to 35 GPM flow rate and 120 PSI pressure, designed for corrosion resistance and long-lasting industrial use across diverse fluids and sectors.














| ASIN | B07KSYF7YB |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #196,357 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #86 in Diaphragm Pumps |
| Brand | Happybuy |
| Color | Black |
| Customer Reviews | 3.9 3.9 out of 5 stars (307) |
| Date First Available | September 18, 2018 |
| Global Trade Identification Number | 00789458202135 |
| Included Components | 1 x Air-Operated Double Diaphragm Pump, 1 x User Manual |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 19 pounds |
| Item model number | QBY4-25L |
| Manufacturer | Happybuy |
| Material | Aluminum |
| Maximum Flow Rate | 35 Gallons Per Minute |
| Maximum Lifting Height | 275.59 Feet |
| Part Number | diaphragm pump |
| Power Source | Air-Operated |
| Product Dimensions | 7.8"L x 7"W x 33"H |
| Size | 35GPM AL Alloy Nitrile Rubber |
| Style | Diaphragm |
| UPC | 789458202135 |
O**A
Pump
Worked very well.
A**N
Worst pump I’ve ever used.
Worked for water barely and then when I tried oil it didn’t work at all. Went out and spent 2k on a wilden pump and have had not a single problem. Kept getting air locked. Waisted time and money on this piece of crap. Go buy name brand and save yourself the headache.
F**V
Pump ran fine for 6 months then failed
Pump ran fine for 6 months then failed, no product support or warranty. Sold by Amazon but Amazon says not supported.
K**.
Fast and Furious littke pumo!
Well at first we THOUGHT the unit failed . It did not,there was an air flow issue and we did not notice it. They sent out a replacement ASAP. We discovered the problem was our own doing, so I promptly returned the new one instead of swapping . This pump is fast, and furious. It does more than the old twice it’s size unit we had and is amazing.We use it for hydraulic fluid exchanges in the field. Old out , new in. It’s great!!
B**2
Worked Well Until
This pump worked well for us. We pump some fairly thick polymers and we use a portable gas powered compressor. It pumps about 10 gallons a minute of the really thick stuff (like Elmer's Glue) and about double that rate with the thinner stuff. Also, my air drier failed and damaged the pump. After much research I found that the air side rebuild kit is ARO 637434 Air Section Service Kit and available on Amazon. If for any reason this kit does not work as expected I will update this review.
D**I
great
work better than i thought it would
B**.
Poor workmanship
New the pump leaked air from a gasket between two metal surfaces. I sent a message with a picture indicating where the leak was. The company has a no return policy. They suggested using Teflon tape to stop the leak. They either didn't understand were the leak was coming from or they are clueless about their product. The company offered a $30 refund. The product cost over $200. Not much compensation. I would not recommend purchasing any products from this company.
A**E
happybuy Diaphragm pump 1/2 inch inlet and outlet.
The pump works great and fantastic but was unable to pump our product due to the product viscosity. So I decided to exchange it for a more powerful pump. smooth transaction and reliable seller.
P**S
Used to pump oil and works well
P**Y
Delivered quickly and works perfectly
J**T
This pump works great I am using it as an engine oil recovery pump and it does a great job even in -20 just make sure you have a dry air supply in the cold
P**L
The pump works very good I like it
M**E
USE IT TWO TIMES THEN IT WOULD WORK ANY MORE
Trustpilot
3 days ago
1 week ago