Here are some specs and information.
7 people in the house. 2 adults, 4 girls ages 6-12, 1 boy age 14.
Actual water usage from city water bill (avg. for past year)= 46 gal/per person per day. high month avg was 61 gal. per day. low month avg. 37 gal. per person per day. I would say the norm would be around 50.
3/4 inch plumbing. Water pressure to house is approx. 60 psi
city water specs:
alkalinity- filtered 294mg/l
TDS-456-470 mg/l ( I think he also divided these 2 figures by 17.2 and got 27 and 26.5 respectively)
http://www.windom-mn.com/wp-content/...ity-report.pdf (this is a link to my city water report. It will list some things I have not already listed.)
I have a flow rat of around 6gpm at tub and downstairs faucet where softener will be located. Kitchen sink and other faucets are much lower than these 2.