
As with all Chinese made fittings, the tolerances are not very good. I've found that to get a good seal that doesn't leak, you need to use teflon tape and pipe sealant together to prevent leakage. I usually wrap three layers of tape around the nipple and apply sealant to the tape and internal threads before assembling them. I have found this to stop leaks and have tested my fittings up to 120psi.

1 Inch Beduan Brass Electric Solenoid Valve, 12V Normally Closed Air Valve For Water, Gas, Fuel, And Oil
10 Review

Upgrade Your Draft Beer Kegerator With The TerraBloom CO2 Keg Pressure Regulator - Dual Gauge Heavy Duty Unit With Safety Features
16 Review

High-Quality QiiMii Stainless Steel Sanitary Clamp With Silicone Gasket - 2 Inch, Single Pin Tri Clover Design
16 Review

Vacuum cleaner Dreame V9 Global, white
145 Review

Durable and Versatile: Happy Tree Polycarbonate Industrial Equipment
3 Review

Flexaust 611S Polystyrene Cleaning Crevice: Versatile and Efficient Solution for Deep Cleaning
4 Review

SAFBY Nozzle Thermoplastic Equipment Spray
3 Review

Ultimate Performance: SpringSpray Aluminum Equipment Heavy Duty Industrial for Optimum Productivity
3 Review