If the pump can't get the pressure high enough, adding the tank won't help,
as it's the pump that pressurizes the tank. The tank does not add pressure,
it merely "holds" it so the pump doesn't have to run unnecessarily.

Typically, those setups consist of a pump, tank, and pressure switch, having
an on/off pressure differential, in addition to a setpoint. When the
pressure in the tank drops below that setpoint, the pump comes on and
repressurizes it to the higher pressure of the differential, then shuts off
until it gets below that lower setting.

In most misting systems, the flow out is a lot less than the capacity of the
pump. Rather than having a (numbers for extreme example only) 20 gpm pump
running constantly while the mist heads are only allowing 1 gpm - a real
strain on the pump motor - the tank allows the pump to function at full
capacity then shut off.

In my system, during a 20-minute continuous mist cycle, the pump runs four
times for about a minute each time.

--

Ray Barkalow - First Rays Orchids - www.firstrays.com
Plants, Supplies, Artwork, Books and Lots of Free Info!


"Jack" wrote in message
ups.com...
well I run my off a sump pump which is connected to a standard hose
fitting, it took me a little looking at the hardware store to find a
3/4 to 1/2" push adapter. The pump is a 1/4 hp eletrict, it has a
little power getting pressure to the top of my shelve ( a 6' rise)

What you might want to do is see if you can get a larger pressure tank
for your well head.
I am trying to see if I can hook a presure tank into my system if I
expand it and have it make up the pressure difference, I think if I use
PVC and run it to a elevated pressure vessel that I should get good
pressure, the part I couldn't figure out is how to wire, you have to
delay the misters until pressure has built up.

Jack