Replacing 20yo pump+tank - Constant Pressure or traditional?
Planning on replacing my current pump and tank this year proactively as I know it’s getting up there in age and I just had an irrigation system installed last fall that is putting a bunch of new load on it, especially with the current 32gal pressure tank.
I spoke to one installer who said they don’t recommend constant pressure but can prove it out if I want, they recommended a traditional setup but sizing the tank up to a 65gal to help with the irrigation.
Got a quote from another company that priced out a Grundfos constant pressure system for me with a 5 gallon tank. This surprisingly came in $1500 cheaper than the other quote for the standard pump and 65gal tank.
The current setup is a 1hp pump about 500’ down from what the original installer told me. I don’t have specific flow data unfortunately, all I remember when they did a test when I bought the house 9 years ago was that the guy testing it said it had good recovery and seemed to be very healthy. The water level drop was pretty low from what I remember him saying. I somehow lost the report they had given me back when the testing was done.
My only concern is with the pump being that far down, do I have anything to worry about in terms of flow rate? I know that’s a lot of pressure just to get the water up that far and the flow rate at that depth doesn’t seem great around 4-5GPM based on the chart for the pump they’re recommending.
Any general opinion of standard vs constant pressure in this setup would be great.