After doing major repair work on my sprinkler line, I'm facing the
following situation: I turn on the sprinklers and get about 70%
pressure from them. After about 40 seconds or so, they kick into high
gear and deliver 100% pressure. Is this normal, and it just simply
takes that much time for a sprinkler line to get fully pressurized?
Or does it indicate a problem that has yet to be detected?
Normal. The drains in the line don't close until the pipe fills
with water and the air is expelled from all the sprinklers. Then,
since water doesn't get out as easily as air, the pressure
increases, and the drain valves close.
My ignorance will be evident here, but I'm not sure I even have
drains. Unless they're built in to the valves/backflow preventers. I
live in Northern California where freezing usually isn't a problem.
And I installed the sprinkler line myself and don't recall installing
any drains. :/
Air coming out first? Well, water comes out of the sprinklers almost
instantly, just not at full pressure at first. It's not like they
hiss air for any length of time before the water flows through them,
if that's what you're asking.
It's just the one zone that starts off slow, a pretty consistent 40
second delay. It's a brand new valve assembly, so I'd be a little
surprised if that's it. But hey... So what is the valve actuator, and
is there a way to keep it from sticking?
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