Bring four lateral lines into your mainline with this plastic 4-way mainline entrance.
Also known as 4-way mainline tees, this fitting comes in three sizes to fit 1/2", 3/4", and 1" plastic mainline tubing. Has hose barbs on both ends to install in the mainline tubing, so it is like a coupling with four entrance ports for 5/16" plastic lateral line tubing. The entrances are in the shape of a Y to improve flow.
Hose clamps should be used on the plastic mainline, securing the line over the barbs, to make certain the fitting seals well and does not pull apart with time. Plastic caps should be used on any unused entrance ports, to seal the system from leaks.