If you want, you can use an extra piece of the same size hose, and install the T without cutting the original hoses, just disconnect the original hose where convenient, connect that end to the T, and connect the other end of the Tee with the extra piece of hose. Then when done, the T can be removed and the original hose reinstalled without the worry of leaving the T there. I tried leaving the T installed once, and it leaked because it got crushed and deformed by me overtightening the clamps.