valve question

[swdflorida]

I just finnished drilling a 4'' well and going to put in a 2 hp 40 to 50 gpm submersible pump in the well, running to an aerator tank and branching of for irrigation around the house, wanting to know about a cycle stop valve after the pump and before the aerator tank, and what size pressure tank to use on this set up,we usually use a 20 gallon tank with a 1 hp but with a bigger pump just dont know, any info would be great. thanks, jlpII

[Karen Austin]

The 20 gallon tank will still be large enough...I would recommend the model CSV125 at the 40 or 50 psi setting depending on what your pressure switch setting is.  (40 psi with a 40/60 or 50 psi with 50/70)
It will have a control range of 3-50 gpm and a pressure tank fill rate of about 3 gpm...meaning that your 20 gallon tank..that has about 5-6 gallons of drawdown will take a minute or two to fill and turn your pump off when you are not using water.  Without the Cycle Stop...you would need an 119 gallon tank to get the same run time without the valve.  The CSV will need to be installed prior to any tee offs including the aerator tank.