We had a good trade show this year. Always someone who hasn't seen the ball valve with a freeze plug. An ex-employee from years ago brought his boss over to see my product. The owner of Colorado Sprinkler Service was impressed with it and will be carrying the freeze tolerant ball valves in his service trucks and his new retail store at 1180 S. Pierce st in Lakewood , CO. I can tell he is customer service orientated. Anyone who gives a 5 year warranty on new systems (including freeze damage), does care about having the customer have a great experience.
We had a lot of orders from Texas in Feb. I talked to one person and he says they leave their sprinkler systems on all year there. When a cold front comes in, then they shut the ball valves and drain the back flow device. Unfortunately, that's when a ball ball cracks- when they are in closed position-full of water.
Also Blue Heron displayed his new lead free PVB at the show. It comes with freeze tolerant ball valves on it. The first complete back flow device standard with freeze tolerant ball valves included. Blue Heron chooses to use plastic freeze plugs instead of the original brass plugs.