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Join Date: Jun 2009
Location: Kemah, TX
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Appropriate use of single clamps might be the fresh water system but not seacocks or thru-hulls.
On my boat 80% of all hose clamps are not on seacocks or thru-hulls.
Actually I did not say most barbs are not long enough. I said some manufacturers still make products without enough room. Most all marine rated bronze or Marelon barbs are indeed long enough. It is when DIY's decide to visit Home DEpot and use brass barbs that they often come up short.
I cannot speak for anyone else's boat, but on my 20 year old boat most everything is as it came from the factory, and many barbs do not have room for two clamps.
The poor quality of the Ideal clamp is perhaps the sole reason the ABYC USCG and the CFR specify double clamps on flexible below water hoses.
And as the USCG states: "All seawater flex hoses shall have double corrosion resistant clamps."
This is kind of my point exactly. If you use decent clamps and maintain them properly, it is extremely improbable you will have a failure. Most failures occur because people do not maintain their boat properly. Take the example of someone who has a boat with a freshwater system that does not have barbs large enough for two clamps (which I would think is the majority of good old boats). Spending hundreds of dollars replacing all of that just for the purpose of putting two clamps on each is folly. in most cases one clamp is sufficient. Just maintain your boat properly, inspect regularly, and replace clamps that you think are suspect.
I am certainly not arguing with the coast guard regulation. I double clamp every seawater hose with a 316 clamp.
Pacific Seacraft 34 #142
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