I have seen a couple people heat the hose and muscle it on the fitting... LOL
If I ever get around to finishing I'll post up my ballast story. Yes, you can stick 1" hose on the Tsunami 1200's 1-1/8" hose barbs. I've done a bunch of them now so I'm a pro...LOL The 1" vinyl braided is pretty easy to do, the 1" premium hose with the coils is a total PITA but still doable. (WM said you can actually stretch this hose to go over a 1-3/8" fitting but i wouldn't do it. I'd worry about the integrity of the material giving up.)



I opted to go with a bunch of the Attwood 3902 straight fittings shown above in my setup to avoid the 90 degree corners where possible. They're still a 1-1/8" hose barb though just like the 90's that come with the pumps and screw right on to that oddball pump inlet and outlet thread.