Cycle Stop Valves
Pump System Questions and Answers => Frequently Asked Questions => Topic started by: jamesEricAndy on June 18, 2019, 11:47:40 AM
-
Since the CSV will control the pump to provide a constant pressure of 50 psi , it seems that a DEEP well will have a limited capability to provide sufficient GPM under a high load like running sprinklers while taking a shower, and running a clothes washer. We were told when we bought our 60 year old house that the shallow well failed and was replaced by a "deep" well, but have no idea how "deep" it is.
How can I determine the max GPM the "deep" well is capable of providing, and how many GPM would be required to provide water to a single sprinkler, shower, and washer at the same time?
Thanks
-
A deep well must provide adequate flow, CSV or not. Actually the CSV is easier on a weak producing well than without a CSV. With a CSV the pump is only drawing as much as you are using. Without a CSV, the pump always puts out maximum flow until the pressure tank is full. Many times the extra water produced that is going into a pressure tank is enough to suck the well dry.
The average shower is 3 GPM. The average sprinkler is also about 3 GPM. But those can be different. The washer will use 5 gallons and quit, so it doesn't use nearly as much as a shower or sprinkler.
5 GPM is usually enough for a house. 10 GPM is a good margin of safety.