We may receive a commission on purchases made from links. No toolbox would be complete without a wrench. When you're completing a basic DIY project that involves tightening bolts or you're ...

His first solution was a kind of tong that could better grip the pipe but still proved less than ideal. Using wood, he carved out a prototype wrench that had a slightly uneven, serrated surface.

When you push the pipe into the fitting, a lock ring grips the pipe. Hand tighten each nut. Do not use a wrench. Photo 4: Use ...