Submersible Pump Failure #4

I am using F&W sub pump single phase 2HP /4 "/55gpm in lake for my irrigation system. I have had to replace the pump several times since install 8 years ago- not only expensive but seems to be during hot season when needed most. I use it with 20 gal tank. It irrigates 2 acre lawn with seperate plant bed zones and a small drip irrigation zone. Is the pump failure continuing problem due to over cycling of the pump? If so what is the solution to this? I have just read of a cycle stop valve-does this work to solve this problem? Does it over-labor the pump? Where do I get a cycle stop valve and how do I spec which model? How do I know if this IS the problem or if something else could be causing it? The installer has placed many,many of same installations and I am not aware of anyone else having the problems I am having. I have also been told the pump should be installed in lake at least at 45 degree angle and not 'laying' on bottom?True?Why? Would a switch to centrifugal pump solve reduce the wearing in any manner or same characteristics or use other than winterizing needs? If there another sub pump manufacturer as good as F&W? Thanks.

let some others chime in on this but...

4 new 2hp subs in 8 yrs... OUCH!! ..around here the irrigation contractor would likely get an old fashioned beat-down after the second one got replaced.. i take it they were just out of warranty? 55gpm pump and 20gal tank running different sized irrigation zones without means to reduce cycling can burn up in a hurry, as you can see! ..he should know better.

buy the cycle stop valve ASAP.. it will make all the difference. valveman will know which is best suited.

Cycle control is critical as is directing water past the motor.

WellWaterProducts said:

Cycle control is critical as is directing water past the motor.

Click to expand...

Do you have the pump in a sleeve so that water flows past the motor?

http://www.sure-flo.com/assets/files/Sizing_A_Submersible_ Sleeve.pdf

Here is the pump you might try. Motor over, stand it upright. Sleeve not needed.

http://www.wwpp.com/products/starite-pumps/bottom-suction-submersible-2-wire-pumps.htm

Motors should be vertical and have minimmum cycles.

Size the irrigation so that it runs constantly, or do the CSV.

A CSV will extend the life of your pump and give you constant pressure. The pump doesn't need to be installed on a 45% angle. I've installed the pumps nearly and they work fine. They should be installed in a sleeve but i've known people that didn't and they worked fine. I suggest that you call Cycle Stop Valves as they will recommend the proper valve and walk you through the installation.