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Discussion in 'Irrigation' started by DanaMac, Jun 12, 2011.
Won't turn on. Open circuit.
Closes just fine.
That's my preference as well, but if it won't take care of the problem, that is another unnecessary expense. I know it will help with efficiency of the system, but so would redesigning the whole thing. They have had it at 140 psi for 20-30 years.
Don't know which to try first.... completely different valve (not just the upper half), different brand.
Or as you mention, too much loss of water volume to get all ten heads fully raised w/o manually lifting. Flow may be lost or restricted somewhere but there is plenty of pressure once they all are raised. How old are the heads?
Might be a rock or other debris that gets jammed upon instant full throttle, blocking flow. But with slower start-up flow the object doesn't restrict the volume?
Temporarily remove the heads from the equation, either with plugs or cut the line but remove the wiper seals from the situation. Check the initial / instant flow at various points.
Try bypassing the valve , then turn the water on. If all the heads pop up like they should, then the problem is in the valve.Seems like too much pressure for the valve to fully open. I get a similar problem when winterizing if we come across old Toro flo pros, hate those valves.
I rip them out and install Hunter PGV's, problem solved.
I know it shouldn't matter.. But some of the DVF body cases are SLIGHTLY different. So gut swapping my not be working properly
I would replace the entire valve
In any case get a prv in there on the whole system. At 140 your supposed to have 2 prv in series
Didn't someone have a turtle shell in their main? The shell would sometimes lay flat and everything would work ok, other times it would turn on its side and block the flow.
another tout for the DV......
I don't know why they have soo many different models.
I carried parts for the DVF and the PEB only. The folks that had other RBs could go back to Home Depot and buy another valve.
Did they use different bodies for the DVF valves? Why?