I have an idea of what I need in my head, but I'm not sure it actually exists. My dishwasher is currently connected to my water line with one of those connectors that pierce the line with a needle and you pull it out and it let's the water flow, but I don't think my dishwasher is getting enough water even though I drilled the hole as large as I could. My line is the plastic flex stuff.

So I was thinking a T connector that I can plug the water line into each end and the third leads to the dishwasher line. I've tried googling different things but I can't find what I'm thinking of. Does anyone know if what I'm talking about exists? This is the closest thing I could find, but I need the 3rd end to be able to connect to the dishwasher line.

https://www.amazon.com/dp/B000BQSTZG/ref=cm_sw_r_cp_apa_glt_fabc_Y1X2M0SQRSDRXT4G4BW9?_encoding=UTF8&psc=1

If it doesn't exist does anyone have any ideas on how to modify it to work?