Water softener size/type w/ whirlpool tub
None of the posts or sales reps seem to respond to my Q about sizing a replacement water softener when our family uses an oversized single tub w/ jets several times a week.
HH size reduced from 5 to mostly 2 adults, +1 in college home for breaks and summer.
Large home, 4 bathrooms w/ 3 showers, a 50 gal. tub w/ jets is used several times a week [fully open faucets fill 1 gallon in 5 seconds, so about 12 gal/minute flow... from charts found thru links on this site]
City now has water treatment, hardness level is 13 and iron .01
We have a water efficient washer & D/W.
Kinnetico proposes 2 very small tanks, the Q37 w/ only 9 gpm flow rate at 15 psi and resin volume of .3 ft squared x 2 tanks. I questioned if this would be adequate and his calculations were it would and I could go up to the next size if I wanted but with the 2 tanks, they can be constantly regenerating if we are suddenly using a lot more water. I wonder about the noise level for this regeneration since this occurs below a bedroom.
I did not like to hear the old system, likely a 5600 Fleck, draw water at night to regenerate.
A second option, much cheaper and good quality, is the Hague product, the Hydro Clean 35000 grain unit, HC35, with a resin tank just over 1 cu foot and which uses fine mesh resin and is supposed to take only 20 minutes to regenerate [less night noise is good].
Finally, a local co. we used in a previous home, constructs their own units, not sure of control valve. It meters useage and adjusts reserves based on previous 21 days useage. They propose a Model EM 50, "perfect for 2 person household on city water." Price is the lowest. Warranty is good. Their upgrade model offers some of the things found in the Hague, but has a much longer warranty.
One company emphasizes 1" plumbing will improve waterflow which isn't an issue now w/ our 3/4" set up and 3/4" pipes even when 3 showers were running or an appliance and shower.
All 3 dealers have an A+ BBB rating, plus long term presence in the area.
Q: How is the math for calculating the size impacted by the large tub w/ jets? And, summer increased use w/ more in household?
Q: Oversizing vs undersizing. The old softener was way undersized and we have the calcium deposits and rust stains to prove it. Now I am likely overly concerned about "enough" capacity.
Comment: Less salt is better. I want less salt use b/c I hate the carrying of bags & know we already put too much salt in MN lakes and streams with our winters!
Any advice on sizing, product selection. Probably will go w/ one of the cheaper options. 24/7 thing not a big deal, don't want to listen to constant noise of regeneration.