I havent noticed an excessive loss of flow with these fittings.. but then again, my pump moves 400 some odd gph at 22' head =). Using larger quickdisconnects seems like a pretty good idea, only problem I see for those of use who are using 1/2" systems is that the next size up (that Colder seems to carry, anyway) is 3/4", which is a bit too large (not to mention bulky).
Main reason I wanted to go with these was the whole external enclosure I'm working on (bulkhead fittings are VERY nice). I also decided to use them on all the main components so that I could swap out parts without having to drain the whole system. The Colder fittings seem pretty high quality. I tried some brass/metal fittings on an earlier test setup, and wasn't very pleased with their performance or their durability.
--HP
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That which does not kill me had BETTER do enough damage to keep me from firing back!
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