I am using it for resin casting. My husband and I had to use loctite to keep the pressure. It took us three times to figure it out. But, now, it's perfect! Keep at it, if it's leaking, you can do it! PS. How to check for leaks: use a spray bottle with dish soap and water to spray everywhere there's a connection. Pressure it up and wherever there are bubbles, that's your spot to secure.