How much discharge rate your client is asking - guesstimate it here.
Mostly, we experience that solar water pump customers can’t define their requirement in terms of normal discharge rates rather they will ask you to quote 2'', 3'', 4'' etc. delivery. From an engineer’s point of view, this demand is quite vague since we can get same discharge rate with full flow from two different pipe diameters though having different flow velocities (throw).
If you are using Franklin Electric pumpset, we have designed a solution to understand customer’s demand very close to what he will be happy with, just ask him ‘how far the water shall fall’ from the pipe end, translate this in to inches and use the calculator given below to assess his demand of discharge rate: