Set salt dosage at 8 lb salt/cubic ft of resin. Change capacity to 35, brine fill to 8.

Since the only analysis you have provided is hardness, we will have to err on the conservative side. Set day override to 8.

You have a 3/4" Fleck 5600SXT installed on a 1" water service which is a code violation in many locales and a poor choice. Did you give the vendor the supply line diameter when ordering? If you did then they screwed up. If you didn't then...

Yes. I provided them with all the info. I also asked that particular question prior to purchasing the unit. The rep reassured me that this unit was suitable. They did send me 1" bypass valve.

Other than possible code violation what issues might 3/4" softener cause on 1" line?

Thank you.

A 3/4" valve on a 1" line will see some additional pressure drop. Frankly, although it may be a code violation (and we don't know that because we don't know where you live - you may look into it if you wish), you won't notice the difference unless you are trying to run a very high flow rate through the valve. At 15 psi pressure drop, the 5600 will flow 20 gpm and the 7000 will flow 28 gpm. The CV (flow through the valve with only 1 psi pressure drop) is 5 for the 5600 and 7 for the 7000. Peak flow is 26 for the 5600 vs 36 for the 7000. For normal household flow rates, either valve is acceptable, unless local code says otherwise. The real problem is that the softener is undersized for your water conditions (an issue I chose not to bring up in my first post because that ship has sailed), which means it will regen more often and wear out faster. At this point, it's payed for and installed so you deal with it, unless it is actually a code violation in which case you may have some standing to force the vendor to take it back and send one with a 1" valve.

Thank you for the detailed explanation. The sales guy actually talked me out of purchasing 7000 valve. I asked him about the size of the metering valve of the 5600 and assured me that it was fine. He also tried to sell me 32K system while I was considering 64K. He told me that 40K would be overkill so I settled on 48K for when my water consumption goes up. This is a little bit frustrating and irritating.

Could you please explain how I should have calculated the size of the system?

I live in Plymouth MN, how do I find out what the code requirements are? My understanding is that there is no national plumbing code like National Electrical Code.

Thank you.

Oh, crap. I screwed up on the calculation - transposed a number on your water use. 1.5 cubic ft is fine. The lesson here - check. Then double-check. Then post.

To find your local code requirements, talk to a plumber with a good reputation - that'll be easier than reading through code yourself. If you want to actually read the code, your state's website should have the information about what code applies.

If you are on a municipal water system you are likely under a plumbing code.

I don't have the citation handy but in plain English one can not install a device or appliance in a service line that restricts the diameter or flow of that service line. Plumbing diameters are calculated to provide the required water volume and pressure for the appliances and fixtures downstream. If you have a 1" service it was sized for that application.

The plumbing police will not show up in the middle of the night to red
tag your house. There is no failure looming because you installed a
5600 on a 1" service. Installing a smaller bore softener valve than the service line is often done just like an alarmingly high percentage of softeners sold, both online and in person, are undersized for the treatment requirements of the installation. It is a rare occurrence to come across a softener that is correctly sized and set up for efficient operation.

Unfortunately your vendor supplied the wrong size control valve (the 1" bypass does not correct for the 3/4" bore of the 5600), second tier quality 8% resin instead of first tier quality 10% resin, and did not instruct you how to correctly set up the softener, but that is in keeping with their apparent lack of knowledge regarding water treatment and plumbing requirements that your vendor has demonstrated.

Instead of getting what you needed you got what they wanted to sell you and you had no way to know that was happening.

You didn't know what you didn't know and stumbled onto
an online vendor who was motivated by profit rather than selling you what
you needed. You are not alone cause the same thing is being done to unsuspecting customers every minute of every day. That's why people who know spend their time trying to help people who don't know on these forums... if they'd only ask before they buy.