I have two tanks in my boat and I was having problems getting the regular screw clamps to seal off tight enough to stop air leaks. After breaking several I went to Napa Auto Parts and they told me to try some that they have for Fuel Injection Lines, well after putting them on I had no more leaks in the fuel system. The regular screw clamps are .99 cents and the ones that I purchased are $1.49 each. Money well spent in my book. So here is a picture of the one that didn’t work and also the one that did.
Part Number 705-1227
Thanks NAPA for all the help