🔄 Keep your flow flawless — never look back!
The BBTUS 3/8" 10mm Inline Barbed Check Valve is a compact, durable one-way valve crafted from ABS resin and silicone rubber. Designed to prevent reverse fluid or air flow, it operates reliably between 25°C and 60°C with strong resistance to corrosive environments. Certified to NSF and ASTM standards, it’s perfect for professional-grade fuel, gas, liquid, and pneumatic systems requiring precise, maintenance-free flow control.
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Brand | BBTUS |
| Item dimensions L x W x H | 0.76 x 0.78 x 1.65 inches |
| Exterior Finish | Abs,Rubber |
| Inlet Connection Size | 0.38 Inches |
| Inlet Connection Type | Barb |
| Outlet Connection Type | Barb |
| Maximum Operating Pressure | 2E+2 Kilopascal |
| Number of Ports | 2 |
| Outlet Connection Size | 0.39 Inches |
| Specification Met | NSF, ASTM |
| Valve Type | Check Valve |
| Manufacturer | BBTUS |
| UPC | 191868794092 |
| Part Number | 99502 |
| Item Weight | 0.317 ounces |
| Product Dimensions | 0.76 x 0.78 x 1.65 inches |
| Country of Origin | China |
| Item model number | GY1803 |
| Is Discontinued By Manufacturer | No |
| Size | 6*4*1cm |
| Color | 2 |
| Item Package Quantity | 1 |
| Included Components | check valve |
| Batteries Included? | No |
| Batteries Required? | No |
J**.
PERFECT.
VERY low valve open pressure- perfect for something like a small condensate pump. I recently ran my condensate to a sink drain pipe and wanted some reassurance that if the pipes ever clog I won't have anything flowing back down to my pump.
C**N
Works As Expected.
Used this vacuum check valve as a secondary/backup connection to my Electric vacuum pump that supplies vacuum to my brake booster. If the electric vacuum pump ever fails, then the check valve will allow vacuum to my brake booster so that I can at least stop the car.
H**S
Handy
Installed one of these on the main vacuum line coming out of vacuum pump on our 95 Dodge Cummins pickup. Wasnt sure if there was a check valve already installed in the pump but we wanted to make sure oil stayed in the pump not pushed thru all vacuum lines.Rather be safe than sorry...great product..worth the money
M**K
They work, with small issues
So the most important thing for me is they would work even in super light water flow, and they do. That is great. Issue was consistency. One of them started malfunctioning and letting some water through, after a little use. This was actually adequate for my use, but annoying. So you can swap it out for another one, or string a couple in series to solve that issue. Overall not a bad check value for low pressure purposes.
B**K
Works great for brake booster vacuum line
The barbs are not super aggressive so I had to use clamps. This is being used as a check valve going to the brake booster on a turbo car running 20 lbs of boost. Works great
A**K
Both Failed
I installed these in the line down stream of the condensate pump for my A/C unit. The first one lasted a couple of years. I noticed the pump cycling more than normal and checked it. the valve was letting water backflow. I installed the second valve ,and it failed within a week. The pump is only pumping up about 3 feet and thru about twenty five foot of line. The check valve should be able to hold against that small amount of back pressure.
B**T
Works perfectly on a condesation pump
My condensation pump's check valve slowly let water back into the reservoir. Since that was 7 feet worth of water in the hose the pump was running twice as often as it needed to be. This check valve completely holds the back flow allowing the pump to run much less often.
G**S
nice
nice
Trustpilot
2 weeks ago
3 days ago
