wet exhaust hose onto threaded skin fitting?

[FairweatherDave]

I solved my problem another way yesterday but for a while considered putting the new 45mm ID exhaust pipe directly onto the threaded skin fitting, which I then would have clamped on with "stainless jubilee superclamps". I was concerned that the thread would chew into the rubber pipe so I didn't, and clamped into on to the smooth surface of the elbow that came off the skin fitting. But was I right that clamping rubber pipe onto a threaded pipe is a no-no? Just wondering after the event.

 

[ghostlymoron]

Probably the hose would not 'fill' the thread and so leave a leakage path. This could be prevented by using sealant inside the hose.
In my view this classes as a 'bodge' and would not be tolerated.

 

[RichardS]

Probably the hose would not 'fill' the thread and so leave a leakage path. This could be prevented by using sealant inside the hose.
In my view this classes as a 'bodge' and would not be tolerated.

Although, in my view this classes as a "bodge" and would be celebrated.

Richard

 

[prv]

Although, in my view this classes as a "bodge" and would be celebrated.

In my view I suppose it is a bodge but if the hose is a good fit in terms of diameter and has plenty of overlap with the fitting, it doesn't seem like a very significant one.

Unlike GhostlyMoron I would absolutely expect a typical exhaust-sized rubber-lined hose to squeeze into the thread under pressure from the clamps and make a seal; if it needed application of sealant goop in order not to leak then I'd give up doing it that way. Sealant on hoses is much more a bodge in my opinion.

Pete

 

[lw395]

The question is, will the hose clamps squeeze the rubber of the hose into the threads well enough to seal?
Using a bit of suitable sealant to fill the very bottom of the thread might not be the worst bodge on the boat.

 

[ghostlymoron]

In my view I suppose it is a bodge but if the hose is a good fit in terms of diameter and has plenty of overlap with the fitting, it doesn't seem like a very significant one.

Unlike GhostlyMoron I would absolutely expect a typical exhaust-sized rubber-lined hose to squeeze into the thread under pressure from the clamps and make a seal; if it needed application of sealant goop in order not to leak then I'd give up doing it that way. Sealant on hoses is much more a bodge in my opinion.

Pete

I'm a bit sensitive about the integrity of exhausts so wouldn't try any bodges. If there's a possibility of leakage, do it another way.

 

[Poignard]

Best to use a hose-tail.
https://www.asap-supplies.com/fitti...nless-steel-female-hose-tail-connector-422276

If you need one in bronze, expect it to be very expensive.

 

[BabaYaga]

Or something like this might be close enough:
https://www.asap-supplies.com/eu/fi...tings/dzr-brass-hose-tail-skin-fitting-403647

 

[Poignard]

Or something like this might be close enough:
https://www.asap-supplies.com/eu/fi...tings/dzr-brass-hose-tail-skin-fitting-403647

Yes, the fewer joints the better.

 

[macd]

I'm a bit sensitive about the integrity of exhausts so wouldn't try any bodges. If there's a possibility of leakage, do it another way.

...or if there's any possibility of its needing to come off some time in the future. Butchery might be the only way.

 

[KenMcCulloch]

Some boats have a valve (usually a gate valve) on a threaded skin fitting with a hose tail for the exhaust. You can close the exhaust in heavy weather; just remember to open it again before starting, and to exercise the valve regularly otherwise it will seize.

 

[Tranona]

Some boats have a valve (usually a gate valve) on a threaded skin fitting with a hose tail for the exhaust. You can close the exhaust in heavy weather; just remember to open it again before starting, and to exercise the valve regularly otherwise it will seize.

Rarely any need for this with a modern design exhaust run using a gooseneck and a waterlock .

 

[paulieraw]

Best to use a reusable system like Mikalor stainless steel hose clips these are the same as used on aircraft and the design means you get no pinching see photo, You can fill the treads with a waterproof filler and you get a good grip
Cost a bit more but peace of mind and all that

 

[ghostlymoron]

Or something like this might be close enough:
https://www.asap-supplies.com/eu/fi...tings/dzr-brass-hose-tail-skin-fitting-403647

A bronze one from asap is only an extra fiver.

 

[macd]

Best to use a reusable system like Mikalor stainless steel hose clips these are the same as used on aircraft and the design means you get no pinching see photo, You can fill the treads with a waterproof filler and you get a good grip
Cost a bit more but peace of mind and all that

That looks like a Mikalor 'High Pressure" clamp. They're substantially the same as the "stainless jubilee superclamps" the OP proposed using, which are also designed for uniform pressure around their circumference. The point's moot since I wouldn't use either in the application he proposed before deciding to install a hose tail.