Proper location of check valve with dual pressure tanks

[plumbingshark]

Additional pressure tank added to existing submersible pump system to minimize pump cycling. Original check valve not moved. Check valve is located BETWEEN the two pressure tanks. Should it not be moved to be in front of (before) BOTH pressure tanks?

System is running well. Both tanks pressurized to 2 psi below cut in. Is it necessary to move the existing check valve, which BTW, is also 30 years old.

 

[Valveman]

Adding a pressure tank only reduced the cycling somewhat. Adding a Cycle Stop Valve would have eliminated cycling when water is being used, and would have worked with the existing tank or one as small as 4.5 gallon size. There should be no check valve above ground, as they cause water hammer and pipeline contamination problems. The check valve is not needed and worthless were it is located. A larger tank may minimize cycling, but a Cycle Stop Valve stops the cycling and delivers strong constant pressure to the house at the same time.