Flexmaster Pipe & Tube Joint, 3.00 Inch Pipe, Straight

These Flexmaster joints are designed to seal pipe and tube connections, so they should work well for your hydraulic lines. They're not really meant to hold entire hydraulic lines systems together though, so make sure you've got proper supports and restraints in place.

Sealing is the job here, not structural support. The joint keeps the connection tight and handles angular misalignment up to 4 degrees per end, but the hydraulic lines system itself needs to be held in place with hangers, guides, anchors, or other external restraints. The joint won't prevent the pipe from moving along its length on its own, so don't skip those supports.