Matching Different Size Hoses Up (Nicro Vent to Vent Hose)

[rebel heart]

I have a Nicro vent (3 3/4" OD) sticking about an inch under the cabin overhead. So it's a 3 3/4" OD pipe, of sorts.

I have about a 3 1/2" OD flat flange that I need to fit against that 3 3/4" OD pipe.

What I'm trying to figure out is if there's a flexible arrangement for matching these up. Like a hose clamp on each end and some kind of airtight material in between, like a waterproof canvas of some type. I guess if I had a 3 3/4" in diameter and maybe a couple of inches long I could just hose clamp the two together.

Kind of random, I know.

[Blue Stocking]

Plumbing shops have these in black neoprene. Looks like a PSS bellows without the accordian part.

[rebel heart]

Originally Posted by Blue Stocking

Plumbing shops have these in black neoprene. Looks like a PSS bellows without the accordian part.

Thanks for the info on that. I did some googling around based on "neoprene bellows" and there are even these guys who will fab one for whatever size you need:

Custom Bellows Worksheet

[GordMay]

"Fernco" flexible couplings
Flexible Pipe Connectors plumbing world has the largest selection

[rebel heart]

My wife might just go ahead and make an adapter out of canvas. Should be sufficiently "airtight" to make sure there's still enough vacuum through the line. And it will match!

[sabray]

fernco fittings will do another real good spare parts thing is Self bonding roofers flashing. Excellent for mast boots but could be used for this. If you see a guy from a roofing company digging around in his van ask him for some. Haven't bought any in years so I don't know what it is called. Its like this "I have a leak on boat and used this real thick stickey rubber stuff that was tough as nails and never leaks.do you know what I mean. Usually its how much do you need? maybe 4' would do it.Then I forget to ask what its called.