the crappiest part of plumming this is i had 7/8 dishwasher hose(i used that since it is black and reinforced) and 1in barb fittings. let me tell you that was not an easy task to get those together but i dont think i will have any problems with them leaking at all. so all my return plumming is now 7/8 all the way until it changes to 3/4 for the bulkhead. look pretty good. but i need to clean up under the tank a bit it is a big cluster f$#% of wires