The water knot that essentially uses two overhand knots is also known by the names ring bend, grass knot, tape knot and overhand follow through. As you can see in the below diagram, the second red strap passes along the course of the first overhand knot in the reverse direction to form the second overhand knot. Flat materials such as tape, leather and straps can be joined by this knot.
It has shown 64% efficiency with 1” tubular webbing of nylon in tests. It reduces the line strength by around 30%-40%. According to The Ashley Book of Knots, the knot has been so named in early editions of English author Izaak Walton which is a trusted source.
How to Tie a Water Knot
- You should arrange the knot neatly and pull it tight for perfect tying.
- For additional security, you can back it up by tying each end in a double overhand knot around the other standing part.
- Ensure that the tails left after making the knot are at least three inches long. It enables you to inspect the knot for slippage. Also check that the ends exit from different sides of the knot that indicates correct tying.
- You can tie it with ropes too. For cordelette, though, we recommend using the double fisherman’s knot.
Water Knot v/s Other Knots
- Figure 8 follow through – Common for tying a climbing rope into a harness.
- Sheet bend – Can join two lines of different diameters too.
- Square knot – Is not as suited for webbing.
- Beer knot – More difficult to tie and one of the tails being hidden from view, doesn’t allow as much safety checks.
- To join two ends of webbing in climbing/rock climbing for making webbing loops, rigging rappelling anchors, etc.
- Making grab handles and slings or quickdraws.
- Firefighting and rescue operations.
- Building hammocks.
- Setting up slacklines.