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Old 06-01-2016, 10:04 AM   #21
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MaineSail to the rescue... again... Proper Installation of Double Hose Clamps Photo Gallery by Compass Marine How To at pbase.com
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Old 06-01-2016, 10:11 AM   #22
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So tell us how much saltwater did the old Hatt leak into the engine rooms? How full did you let the bilge get before pumping it overboard?

Use whatever floats your boat (pun intended) but save us the drama about the hundreds of thousands of boats sitting in marinas right now worldwide in danger of blowing a through hull hose off its barbed connection because the clamp is junk. More boater folklore than fact in this thread from my point of view.
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Old 06-01-2016, 10:20 AM   #23
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Here is one of the original Sabre supplied clamps that I've never bothered to change (I'll change it today). It is on a water tank to water pump low pressure hose and although it is too large it is not as large as some where!
I'm in the middle of disinfecting the water system today...
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Old 06-01-2016, 10:37 AM   #24
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Originally Posted by boatpoker View Post
I can find no such reference in my copy, Exactly what Standard and where within the standard.
Poker,
You must be the local fact checker.
On forums opinions rule.
Re common sense if you have any between checking standards in books it should be fairly obvious double clamping would be ineffective on a short nipple.
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Old 06-01-2016, 11:42 AM   #25
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Granted there are different quality of clamps but I've had every type of clamp mentioned here fail at one time or another. Checking the clamps should be preventative maintenance. I try to go around at least once a year and check every clamp. I'd rather replace/tighten them on my schedule.
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Old 06-01-2016, 11:44 AM   #26
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Here is one of the original Sabre supplied clamps that I've never bothered to change (I'll change it today). It is on a water tank to water pump low pressure hose and although it is too large it is not as large as some where!

I'm in the middle of disinfecting the water system today...

Bruce

Hmmmm...

11 year old oversized cheap clamp from a saltwater environment... And it's being changed before it fails as part of a preventative maintenance program.

Well done
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Old 06-01-2016, 11:58 AM   #27
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Hose Clamps Are Not All The Same

I like AWABs. But only the 316. I saw that some unscrupulous sellers(eBay & Amazon) had some 304s for sale at 316 pricing.

I'm not one to reuse hose clamps or fasteners. When doing maintenance, I replace rather than reuse. SCC and crevice corrosion kinda sneak up on you.

That said, I agree that there is a lot of overkill in the the whole safety aspect of hose clamps. It seems the norm to have to work the hose off of a nipple.

I would also speculate that those boaters on a boating forum are more cautious on their operation and maintenance. Otherwise, why would one even be here if it wasn't to seek information and betterment?

I'm anal by training and not necessarily by nature. Spinning wrenches on a submarine does that to one. That's my excuse.
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Old 06-01-2016, 12:34 PM   #28
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If 2 clamps are good, then 3 clamps are better.
Make sure the hose adapter is long enough.

I have sometimes used thinner perforated clamps when the hose adapter is too short.

Other thing, on most all my suction lines, the hose fits tight to the hose adapter, it can not just slip off. I could run with no clamps fine.

Some of my adapters are simply bronze pipe nipples apparently cut in half with a tight fitting hose pushed on. Marine hose can be bought in 1/8 sizes. Boat is almost 50 years old and has never sunk.
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Old 06-01-2016, 12:39 PM   #29
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If 2 clamps are good, then 3 clamps are better.
Make sure the hose adapter is long enough.
At some point in the past a PO of my boat installed "second" hose clamps *everywhere* regardless of need or even worse, if there was room. I found several instances of hose clamps not over the hose barb at all but instead constricting and possibly damaging the hose.

Ken
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Old 06-01-2016, 01:14 PM   #30
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Good perspective Spy....I agree....each time I take something apart to fix, I try to make it a little better in some way...

My issue is when the partly line is to blatantly follow the "herd".....

Most of my part time boating friends tend to blindly follow things they read in their magazines and hear at boat shows and either spend big bucks or delay boating time worried about upgrading or fixing things that really are OK.....especially because their typical boating is done in areas and conditions that are benign.

If I had planned to cruise in very remote areas, areas prone to sudden violent storms or push the limits of a vessel...well heck....I wouldn't have bought the boat I did. So why would I or anyone else be obsessed with trying bit by bit to upgrade it into a world class cruiser?

Not only is it a waste of my time but money as well....I will spend the money and time on parts and projects that I know are a definite help....but too many days running , working on, salvaging and saving boats have given me a perspective of what is OK versus overkill.

In many hose applications on all kinds of appliances, cars, etc...are nothing more than zip ties or press together plastic clamps.

So if your thing is go all the way...every time...on everything....great....enjoy and take pride...

But I hope every boater with limited experience doesn't feel the need to do anything more than good maintenance with good, but not necessarily top of the line parts. As long as they know what they have and that boats require vigilance, whether gold plated or run of the mill, they can relax.
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Old 06-01-2016, 03:55 PM   #31
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What determines a junk clamp? Just perferations?


Nice clamps are great.....but good installation of decent (not top of the line).clamps and checking critical ones is way more important.




Well said in my opinion. I have had hoses but not clamps fail. The only thing I would add to this discussion is that on critical hoses, I double and reverse clamp the hose.
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Old 06-01-2016, 04:44 PM   #32
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Poker,
You must be the local fact checker.
On forums opinions rule.
Re common sense if you have any between checking standards in books it should be fairly obvious double clamping would be ineffective on a short nipple.
What an unwarranted cheap shot and curious thing to say since I offered no opinion whatsoever on any clamps or methods. I merely provided information as to what the ABYC Standards say since another poster had stated incorrect information.

And yes I do have some common sense and there are several areas on my website where I point out the potential folly of a second clamp .... with photos of examples such as shown in my Marine Survey 101 article. This article with photos by the way was first posted on this forum in May of 2012.

Apology accepted.
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Old 06-01-2016, 04:53 PM   #33
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[/I]



Well said in my opinion. I have had hoses but not clamps fail. The only thing I would add to this discussion is that on critical hoses, I double and reverse clamp the hose.
I forgot where...maybe BoatUS...checked with clamp manufactures and ran tests...didn't note a significant difference in reverse clamping and the manufacturers of at least some said not necessary.

Have to look that back up...both did say size is more important for a good circular clamping force IIRC.
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Old 06-01-2016, 05:29 PM   #34
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Some folks seem to be in a preaching mode today.

Your boat may be worth $50K, it may be worth $500K. Your life is worth what you think it's worth.

West Marine sells two different kinds of clamps. One is about $2 and one is about $5. That $3 difference is pretty small compared to the value of your boat. Or your life.

I spend the $3. Not that I have to, because I can and the better clamp gives me peace of mind.

And yes, I use two clamps in critical applications.
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Old 06-01-2016, 07:15 PM   #35
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I double clamp all that will take 2 properly. Use T bolt clamps on exhaust and fuel fill hose. If the hose has wire in it to keep from collapsing, I use a T bolt as it often takes a little more pressure to make them seal tight. With the exception of T bolt clamps, I only buy in boxes of 10 which significantly reduces the price and gives me spares. Hose clamps are like zip ties. One hundred 8" zip ties are $7. One thousand, same brand and same store, are $20. From my refit bill, I was paying $10 to $16 per box for clamps. Biggest was for 1.5" id hose.

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Old 06-01-2016, 11:09 PM   #36
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Another type of clamp I'm seeing more and more is the constant torque clamp.
They are spring loaded so as the hose expands or shrinks with temperature the compression remains constant. Following is a link to my website. Please forgive me for breaking the rules. I couldn't find the manufacturer's website.
Stainless Steel Constant Torque Exhaust Clamps Mfg# 730
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Old 06-01-2016, 11:15 PM   #37
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These can keep blood from leaking out of you when working in tight places.
Clamp-Aid® Hose clamp end guards marine parts auto parts
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Old 06-02-2016, 04:55 AM   #38
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These can keep blood from leaking out of you when working in tight places.
Clamp-Aid® Hose clamp end guards marine parts auto parts

Bugger me they take the fun out of everything these days
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Old 06-02-2016, 09:03 AM   #39
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Dj vu Hose Clamps



In my humble opinion both of those hose clamps in that photo are junk



T bolt clamps will never let you down




Well not exactly.

I've seen plenty of T bolt clamps fail. They seem to fail for the most part where the bolt meets the T. The bolt snaps at that point from what I'd call crevice corrosion. I've also seen the nut seize up on the bolt.

In fact I think I've seen as many or more T bolt clamp failures than I've seen AWBA clamps fail.
But YMMV.

And the T bolt clamps in the picture appear not to have SS T bolts but cadmium plated ones.
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Old 06-02-2016, 09:05 AM   #40
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Another type of clamp I'm seeing more and more is the constant torque clamp.

They are spring loaded so as the hose expands or shrinks with temperature the compression remains constant. Following is a link to my website. Please forgive me for breaking the rules. I couldn't find the manufacturer's website.

Stainless Steel Constant Torque Exhaust Clamps Mfg# 730


I've used these and so far I like them. Haven't seen rust issues, they won't cut you, and so far they haven't seized up after being on for a while.
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