I assume you are asking if you can cut the hoses of the Antec 630 but leave the bit of hose on the barbs to step up the size of the barb? Yes in theory it should work, though I'm not sure what the outside diameter of the hoses are on the Antec unit. If they are over 3/8 it should work though you may have troubles getting the hoses to stay on if they aren't big enough or don't have any texture to hold on to the new hose with. I think the some of the guys who use to mod the corsair H50 did this but used 5/16 id hose. You also now have three possible point of leakage at the fitting, between the fitting and block, between the original hose and barb and now the new hose and old hose.