Because the line is short, your risk of cavitating is reduced.Suction pool to pump is 10'; 90's I would guess about 4 to 5 Inside the pool it looks like there are two suctions probably tied together to one pipe and then to pump maybe?
AFP -120 Flow rate is so much lower than the existing Northstar?Because the line is short, your risk of cavitating is reduced.
However, at some point, you will begin to cavitate.
It's hard to estimate exactly.
I think that a 2 hp full rated pump could begin to cavitate.
You can put a valve on the return side to reduce the flow if it begins to cavitate.
You could use am intelliflo vs, which will allow you to dial in the flow to where you like up to the point when it begins to cavitate.
So with a plumbing curve ofI think you are right on the pump model as total HP is 1.88. The pump is dead. Before it died it did not sound like gravel it was a very loud whine / bearings maybe?
When it ran normally it sounded just fine.
Cavitation - could I throw a Jandy / flow valve on their and throttle it if needed?
Suction pool to pump is 10'; 90's I would guess about 4 to 5 Inside the pool it looks like there are two suctions probably tied together to one pipe and then to pump maybe? (as soon as I get a camera / phone I will take a pic or two)
Pump to Waterfall is approx 40', 90's I would guess about 6 90's? I can see three.
Awesome.If the NorthStar was not cavitating, then an equivalent pump will probably be ok.
You might be able to go with one of the available pumps and use a valve if it cavitates.
That will do about 148 gpm on your system.Hayward Tri Star SP3220EE 2.0HP