Page 106 - Nate Fitch, Ron Funderburke "Climbing Knots"

Start the water knot with an overhand in one tail of
webbing.

Travelling in the opposite direction, use the other tail
to retrace the initial overhand, ensuring that it remains
flat and parallel through each turn of the knot.

The resulting water knot should have 2-inch tails.

Joining Knots (Bends) 93