The siagcore method works AMAZING!!!! t-valve and vinyl tubing. I did it myself and it worked perfectly!
I bought 10 feet of tubing at home depot, cut a little for the t-valve in place for the gromet, and then two smaller pieces so you can attach your hoses if you dont want to use the actual tubing as your hose.
You can straight up use vinyl tubing as the hoses if you dont mind it looking a bit ghetto lol.