all these confusing ropes
Join Date: Aug 2006
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You can use my little tool I invented. I will do my best to describe it.
first assemble a hammer, hacksaw, a large pair of vise grips, a wooden bung like the type you would use to plug an errant thru hull (the bung should be the size you would use to plug up the sanitation hose) , and a nylon hose coupler the size of the hose. I see there is a Seafit part 357010, WM part 208041 which has a barb on it. I used a coupler that is smooth and that is what you should look for, but here at 1 am I did not find an example online. I bought mine at West Marine. Or you could take the part 357288 and file off the threads inside.
Take the nylon coupler in your hand. you will notice there is a flange in the middle of the coupler, that the two hoses being joined butt up against. You are going to cut all the way through the coupler just on one side of the flange. You will then have two pieces of nylon pipe, one with a flange and one without. Take the piece that still has the flange on it. Try to insert it into your sanitation hose. Its a tight fit, right?
take it and cut it lengthwise. You can now slip it in the hose with ease.
But not yet
First take your heat gun and heat the end of the hose really well, not enough to discolor it, take your time. then slip in the nylon halves, and push the bung in. Now hit the bung further into the hose with the hammer, until the gap between the nylon halves is about 3/16 to 1/4 inch on each side. At this point, the bung will not be fully within the hose; there will remain about 1/2 inch that you can clamp the vise grips with.
What you have now is a hose that is temporarily stretched out.
let this whole assembly sit for about 20 minutes. If you let it sit for less time, the stretch does not hold long enough
I recommend dish soap on the fittings where you will place the hose.
then, quickly, twist the bung out with the vise grips, pull out the nylon inserts, and you will have 15 seconds or so to twist that hose on before the hose closes up on you.