First time water softener buyer looking for advice!
I'm looking to get a water softener for a relative and I'd greatly appreciate some advice. I've been doing a lot of research, so I think I have a pretty good idea of what I need, but I'd really appreciate advice from the experts. Here's their details:
- 2 bathroom house
- no jacuzzi or anything like that, only a dishwasher and a washing machine
- max flow rate ~12gpm
- 1" plumbing
- according to their water bill, water usage ranged from 11k to 19k gallons per month - average is about 16k. They don't do any outdoor watering, car washing, etc., so this is all internal home use. Don't know if this matters, but thought I should mention it. Their household is actually only 3 adults. However, their daughter's family (2 adults, 2 kids) spends the weekends there - which I suppose is why their usage is so high.
Now for their water data. This data comes from a Quality Report done by the city. There are 6 water sources that combine, and the data is provided as ranges, so I took the weighted averages of all the sources.
- hardness: 14.6-28.8 gpg (avg 22.7 gpg)
- iron: 0
- manganese: .0045 ppm
According to my calculations, they need to remove between 60k and 100k grains per week - average is about 84k. I think this would indicate that they need either 3.5 or 4 cu.ft. of resin. However, I've talked to 3 local companies and everyone has said that's way to big for residential. They say those sizes are primarily for commercial, and they all have recommended either 2.0 or 2.5 max, so now I'm kinda second-guessing myself and wondering if I'm missing something. On the other hand, there's a considerable jump in price between 2.5 and 3.5, so if 2.5 will suffice I would go with that. Would there be any downside to 2.5, aside from it regenerating more often?
I'd really appreciate any advice on this.