the space between the inward bend thing needs to be 4mm so that i dont have to use suction cups. i want the length of the whole pipe to be between 6 and 7 inches. that goes for both the inflow and outflow
The length is easy, however the actual bend for an acrylic pipe to 4mm is very difficult if not impossible to achieve. I was trying to do the same thing; the pipe itself will start to warp and you'll get excess acrylic creasing where the lower bend is.