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Old 09-08-2014, 10:11 PM   #1
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Proper way to secure flexible exhaust hose?

Our recently acquired Nordic 26 has an inadequately secured exhaust hose, something our surveyor suggested we address. Doing so doesn't look terribly difficult, but I'm unsure the best way to go.

The section that is loose is between the flange connection where the exhaust exits the rear of the hull, continuing forward through an arc about three feet. The hose was previously secured with two screw head type tie wraps, but both of them failed right at the screw heads. Not too surprising...between aging plastic and the vibration in these obviously weak spots, it was bound to happen.

Is there a preferred support method for this type of flexible pipe? I'm visualizing something like a large cushion clamp...perhaps a pair of large stainless bands to surround the 4" exhaust hose, but lined with something to prevent wear. Whatever I use, I'd prefer to secure it to points underneath with a pair of Weldmount studs - they would be more than adequate strength-wise, and I'm loathe to drill when not needed. Especially since one of the two supports would be best located on the bottom of the cored cockpit sole.
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Old 09-08-2014, 10:22 PM   #2
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When you say "screw head type tie wraps" are you referring to hose clamps?

I am positive you will get a good answer here regarding your dilemma, but some pictures would certainly be helpful,
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Old 09-08-2014, 10:31 PM   #3
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Quote:
Originally Posted by bligh View Post
When you say "screw head type tie wraps" are you referring to hose clamps?

I am positive you will get a good answer here regarding your dilemma, but some pictures would certainly be helpful,

I believe wagmore is referring to the zip ties with the extra ring for securing them with a screw.

Amazon.com: Mounted Head Cable Ties - Color: Black - 100pcs: Office Products

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Old 09-08-2014, 10:51 PM   #4
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I had the same thing as a recommendation on our survey. I cut and sealed (with penetrating epoxy) a couple of pieces of 2X3 and epoxied them to the hull. Then I cut out the center section of some old lawn tractor tires and bolted them to the wood blocks with the exhaust hose in the loop. Mine came out of the wet exhaust and laid on the deck till going up and through the bulkhead to the lazerette and dropped down to the through hulls.
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Old 09-08-2014, 10:58 PM   #5
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exhaust hose support

I think I busted a rib getting over that water heater. Still, this is so much better than the sailboat. I mean really, the hose has room to lie on the deck?
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Old 09-08-2014, 11:36 PM   #6
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Quote:
Originally Posted by ben2go View Post
I believe wagmore is referring to the zip ties with the extra ring for securing them with a screw.

Correct - those are what was used previously, and are all over the boat. Quite frankly, I'm not a fan of them. If they're simply holding something in place and not providing support, i.e. along a wire raceway - they're not bad. However, once stress is applied at the screw mount, they always seem to fail eventually. Still, regardless of whether they're properly used - I'd consider any of the Weldmount wire tie mounts a superior solution. Holds better, less fatigue on the tie wrap, no drilling, and you can reuse them with standard tie wraps if you need to remove something being secured.

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Originally Posted by Apophyge View Post
I cut and sealed (with penetrating epoxy) a couple of pieces of 2X3 and epoxied them to the hull. Then I cut out the center section of some old lawn tractor tires and bolted them to the wood blocks with the exhaust hose in the loop. Mine came out of the wet exhaust and laid on the deck till going up and through the bulkhead to the lazerette and dropped down to the through hulls.
Clever...

My only concern with this solution is space. The exhaust hose runs through an area that is used for stowage, and anything I can do to tuck the hose high without obstructions will help with the limited clearance between it and the bottom of the hold.

Pictures would indeed help, and I'll snap some up tomorrow when I head down to the boat.
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Old 09-09-2014, 05:38 AM   #7
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Greetings,
Mr. W. Any of this stuff suit the application? Pipe Hanger Strap - Pipe and Tubing - Grainger Industrial Supply
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Old 09-09-2014, 06:34 AM   #8
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As RT suggests the pipe hanger tape works well.

The copper type.
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Old 09-09-2014, 10:57 AM   #9
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I stayed away from the hard edge stuff (copper or steel strapping) because I was afraid of wear.
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Old 09-09-2014, 11:47 AM   #10
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They do make plastic strapping...already perforated...I used it to hang new fuel tank filler hose. Home Depot I think...
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Old 09-09-2014, 02:05 PM   #11
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Thanks, all - good suggestions.

Think I'll go with the copper strap, attached to Weldmount studs - but lined with rubber to fend off any wear.
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Old 09-09-2014, 02:14 PM   #12
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Just use the large version of this.
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Old 09-09-2014, 02:20 PM   #13
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Agreed, that would be nice. However, I was unable to find cushion clamps that would surround a 4" diameter hose.

Hence my plan to duplicate one with the copper strap and rubber...but if such an example exists off the shelf, any pointers would be welcome.
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Old 09-09-2014, 02:47 PM   #14
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Greetings,
Mr. W. Copper strap and a length of bicycle inner tube (I would suggest smaller diameter racing tubes) or even a length of bicycle racing TIRE (with the bead cut off) should give you the cushion you desire.
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Old 09-09-2014, 04:31 PM   #15
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Perhaps even strips made from the tire of last years winning car at the Indianapolis 500.
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Old 09-09-2014, 09:27 PM   #16
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I used seat belts from Napa. Adjustable and had bolt on ends
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Old 09-10-2014, 12:13 AM   #17
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AYBC approved no doubt.LOL
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Old 09-10-2014, 05:27 AM   #18
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AYBC approved no doubt.LOL
No, that one was DOT approved.
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Old 09-10-2014, 11:18 AM   #19
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Oh, I like the seat belt! Wish I thought of it.
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Old 09-10-2014, 12:02 PM   #20
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I like to see some flexibility in exhaust hose mounting and attention paid to possible abrasion to the hose from mounting hardware or near objects.

I have some work to do in this regard.
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