It the typical pool hose drain is that 1 1/4" and the return is typical black I wa t to say 3/4" or 5/8" But, I am not positive the size bit am positive. It is the most common.
Thanks powerslayer but, metal and saltwater aren't the best combo. Really prefer the "C" style hose clamps. I can get them from 2littlefishes but, would rather buy off a member if someone has extras
I have all my hoses clamped with these as long as they are not under water. For the underwater ones I have the plastic ones for the ones that are submerged.