Low Quality Perforated Clamps
The other half of this equation is to always use good quality 100% Stainless steel hose clamps. Here at Compass Marine we use only AWAB or ABA brand non-perforated hose clamps.
These days there are far too many substandard perforated hose clamps on the market just waiting to sink your boat. Even clamps marked as “all stainless” are often not “all stainless” or the stainless or no-name imported mystery metal is anything but all stainless. With off shore sourcing & heavy price competition it has become hard to know what constitutes a good quality perforated clamp vs. the plethora of junk that may compromise the above water stature of your boat.
This is one of those suspect clamps I referenced above. It was marked, as you probably guessed, “all stainless“. I suspect it might be “stainless” if you stored it in the Tupperware container, with a bag of Damp Rid, and stuck in the the Mojave dessert with 12% relative humidity. On a boat, in the actual ocean, it certainly was not “stainless” at all.
We used to keep a bucket of failed perforated hose clamps to show customers, this was just one of them. The issue of low quality hose clamps has become so bad that we will no longer install perforated hose clamps for below water applications. Do yourself a favor and request AWAB or ABA branded non-perforated hose clamps for your below waterline applications.