TWO DIFFERENT TYPES OF PUMPS
Also known as a booster pump which sits on top of the ground if you have a pipe or 2 pipes going down to your well with the foot valve. These types of pumps are typically used in shallow wells at 120 ft. or less in-depth.
The common use for well water is the submersible pump that actually goes down inside the well casing towards the bottom of the well and pumps the water from there.
Now, when you’re going to recommend a water treatment system for well water and an iron filter, pH filter or sulfur filter is needed to treat that water properly, then you wanna ask the customer to do a simple flow rate test on their well pump.
We don’t really care what the well does per se but we do want know what the well pump does.
And the reason why we want know that is because we want make sure that whatever we recommend, their well pump is able to backwash the filter properly.
So the smallest, a 1 cubic ft., (this is the smallest) of an Iron filter, PH neutralizer, and sulfur filter requires 5 GPM to backwash.
So if the customer follows the instructions on our website, for having to test their well pump, it gives us those numbers, then we can go ahead and size the proper filter for their particular application.
Some customers as well as trained agents get confused, wherein the customer will say, “I have a big house. I have all these bathrooms. I need 12 GPM.”
But your well pump only does 7 gallons (as an example). So as soon as you draw the first 20 gallons of water out of your pressure tank when it’s fully charged, you’re now working off your well pump which only does 7 GPM.
The other issue is that you say, “we can put a system large enough to treat the high flow rates you mentioned but your well pump does 7 gallons per minute , so you’re not be able to install a larger filter to give you those higher flow rates because your well pumpIs not capable of backwashing the larger size filters which will cause the filter to not work properly.
With that said you always have to stick with what the well pump will do to make sure you can backwash the system that you are recommending.
Credit: Quality Water Treatment