Thanks Gator guy,
My water lines in the house alre in the basement and supply lines are 3/4 and 1 inch pvc. I drilled some holes in my 8" concrete basement walls and ran 1/2" pexalpex (right now the pex is just sticking out of the basement wall not connected to anything). The pexalpex runs under my paver deck to the base of the three 12 ft high columns. I put a brass 1/2 pex tee at the bottom of the column to use for drip irrigation for a few potted plants or a row of plants in the ground along the decks edge. The pexalpex then continues up the column to the top where it can be used to drip irrigate a few hanging baskets. The columns are 2 ft diameter Drivit and the pex al pex is stapled to the actual 6x6 wood posts inside the columns. I want to connect the PVC supply line to a regulator.pressure reducer, filter and run from that piece into the 1/2" pexalpex and split off it to supply all three lines to the top of the column.
I hope that is a better explaination.
Basically I want to connect the irrigation controls to a pexalpex line that has two tees and a 90 deg to the pexalpex under the deck to supply the three lengths of pexalpex to water the plants.