Here is 2 photos I hope will show a few people what not to do.... 10mm Tygon on 3/8" Danger Den Fatboys. Always measure the ID of your tubing. Some how I wound up with 10mm Tygon instead of the proper 3/8". I notified Danger Den and they shipped me new 3/8" Tygon overnight and even threw in a full set of 1/2" Fatboy fitings FOR FREE in case I wanted to use the 10mm. That tells you what a stand up company Danger Den is. They corrected their mistake in the fastest way possible and gave me extra hardware for free! I recommend them to everyone.
This is also a good example as to why you should always leak test the WC system for more than a few minutes. My leaks did not develop until about hour 16 into the leak test. It took that long for the pump to dump enough heat into the loop and allow the tubing to soften and expand. I thought I had fixed the leaks so I leak tested it again, and sure enough around hour 17 the leaks came back.
Oh and for those of you who have a keen eye, Yes I did have the standard white clamps on the tubing. I took them off for these pics. It leaked even with the clamps as snug as they would get.
Again, I can not say enough about how wonderful a company Danger Den is. Their customer service is the best in the business and they really made an impression on me by quickly fixing the problem. So if you are looking for WC gear stop by http://dangerden.com and consider purchasing something from them.
Notice how the tubing does not look "stretched" over the barb. It look and felt like it made a complete seal but sadly it did not.
Anoter shot of the 10mm Tygon being too big for 3/8" Fatboys.