If you have no luck at lowes, try a farm supply or hydroponics place.I'll look into that, I was at Lowes the other day and spent a half hour and looked through all the fittings and even with combinations I could get it down small enough. I cant remember offhand but the size I need is smaller than 1/2". I was going to look somewhere that might have smaller sized stuff like for watering systems like at a nursery or something.