Boat Fender Line Guide
The rule of thumb is to use the largest diameter line you can when hanging a boat fender. Too small a line can cut through a vinyl fender eye like a knife, and larger diameter lines create a stronger connection. Having a better connection between the line and the fender will help keep your fenders working when you need them, in challenging docking situations, and using too small a line diameter voids Polyform's warranty.
Our preference is to use a looped connection with eyed fenders, keeping in mind hole through middle fenders like the HTM will work differently, (HTM Section). A looped connection with a fender eye allows a boater to use a lighter line, which most find easier to handle, while also making a stronger thicker connection to the fender eye. We recommend a splice, like our spliced lines here, or a bowline to make the loop in the fender line. When tying a fender to the boat or dock there are many methods and most work well, but it is common to see two half hitches or a clove hitch used when tying to a rail, or a belay looped connection, or a cleat hitch when tying to a cleat
Doubled or Looped Fender Connection
Line Recommendation Chart
|POLYFORM MODEL||EYE DIAMETER||RECOMMENDED LINE DIAMETER (Doubled Line/Looped Connection)|
|A-0||0.6 "||1/4 "|
|A-2, A-3, A-4||1.125"||1/2"|
|F-2, F-3, F-4, F-5||0.9"||3/8"|
|F-6, F-7, F-8, F-10||1"||1/2"|
|HTM-1, HTM-2, HTM-3, HTM-4||0.625"||1/2" (Straight Piece of Line)|
|LD-1, LD-2, LD-3, LD-4||1"||1/2"|
Fender Lines on Hole Through Middle (HTM) Boat Fenders
Our HTM fenders work best with a 1/2 in. diameter line. You'll need a little more line than an eyed fender because you'll pass the line through the entire fender and you'll need a stopper knot on the end. In general we find the following line lengths work for most boats, but keep in mind your needs may be different.
|Approximate Line Length||8'||9'||11'||13'|