Sprinkler World, http://www.sprinklerworld.com/.
They generally have the 1" polyethylene tubing in stock, 500 foot roll, black only. We then paint it with purple marking paint before back filling the trench. Purple marking paint also purchased at Sprinkler World.
Sprinkler World also caries the 1/2" poly tubing with the purple stripe.
You may be able to find the 1" polyethylene tubing from other irrigation stores, or they may be able to order it. If so, see if they can order it with the purple stripe to avoid the painting step. Sames goes for the 1/2" poly tubing.
wayne fajkus wrote:Just taking a guess. I wonder if a genesis valve is the answer to your problem. I've needed one anytime I rigged a washing machine to drain through a hose.