Do not go with the 1" valves. I put in the 4,500 GPH pump and the 1" valves and did not notice much of an increase from the 3000gph with the 3/4" valves. I ran the 3/4" Irritrol valves for about 3 years and they worked great.

Quote Originally Posted by Beejwest View Post
So springs in half is the way to go?

Want to upgrade to the Irritrol 700's, do they fill faster than the stock orbit valves? Those stock orbits are 3/4", should I go with 3/4" irritrols, or is 1" better. If I do 1", do I need different fittings?