Steel and stainless steel are often the best choices for high pressure and tough conditions, while brass offers good corrosion resistance in certain environments.

It depends on the type and connection—different types are often used to optimize sealing and durability.

Check the shape of the connection: ORFS has a flat sealing surface, while JIC has a conical seal.

This depends on use and working conditions, but inspect them at least once per season and replace if visible damage is present.