How to on selecting and tying the correct stopper knot when repairing pull-start cords. Demonstrates the half hitch, double half hitch stopper and figure eight knots.
Demonstrating some of the many types of valves encountered everyday. Shows ball valves, check valves, gate valves and compares the Joker valve to the Tricuspid, Aortic and Pulmonary valves.
How to do-it-yourself instructional on repairing a door with a loose hinge. Includes removal, planing and reinstallation of a door and restoring stripped out screw holes.