Quote Originally Posted by Akpsdvan View Post
Flow rate?

1.5 cubic would be more in line with 33000 grains at 9lbs and clean about every 10 days with your hardness and number of people.

1" valve Bypass and Valve Fleck or Clack would be able to handle peak flow of 17 gpm with 25psi loss..

Look for one with a Digital meter... so that you can set for both gallons and 9 day over ride..
How do you expect a homeowner to come up with his "flow rate"? And which "flow rate" are you talking about? As a dealer you should be doing that for your prospective customer.

Your statement of 17 gpm @25 psi... I don't see that with the softeners with the Clack WS-1 that I have been selling for over 6 years. And I've sold them on up to 6.5 cuft softeners with many 2.5, 3 and 3.5 cuft softeners. No customer has ever mentioned a pressure loss (or flow) problem. And that includes 2 person showers with up to 6 body sprays. IMO there is something about sizing softeners that you aren't understanding correctly.