Andy, Send you water to be tested by a lab. You can do a search on the web for certified water testing labs. Based on the lab report, you can make a determination on what needs to be filtered out of your current water. Since you are on City Water, you can compare the results with the Water report issued by you local water department (this report should be on their website). On the plumbing forum, post a question once you have the lab results and someone will provide some guidance. You need to build a system that fit you needs. The systems are easy to put together and replacing the filters are inexpensive for most common contaminants. Culligan and Rain soft only sell products and have a vested interest in only selling you products they make rather than what works for you. For instance, you can purchase a whole house water filtration system for chlorine and sediment for under $400 in materials depending on the flow rate that you want. Good luck!

As it turned out, the unit was installed between the cold water intake and the water heater. However, now I wonder about the first plumber (highly recommended by the bldg manager) who apparently didn't realize that the filter could have been part of our problem. That wasn't his only deficiency. And of course aliceinwonderland is quite right about that claim by Evenpure that it might reduce scale buildup. What nonsense. This entire experience has been particularly galling because of the incompetence of various building managers as well as the dumkopff who did the initial installaion. What we have spent on repairs is really infuriating, not to mention the time we have spent without hot water (almost a month) or a dishwasher (six weeks -- that was a year ago). Anyway, I won't work there forever and I guess I just need to not worry about it.

Is the water clear coming from the tap, but gains some rusty color after sitting for a while, or does it have color immediately? A little light reading regarding options for ferrous (clear-water) iron removal: Softener: A softener with specialty resin is capable of removing dissolved iron, up to 7 ppm (mg/L) but asking a softener to remove iron at those upper limits is really pushing it. In addition, a softener will become fouled with particulate iron, so if you iron is particulate rather than dissolved, a softener is not a good option for you. Oxidation/Filtration: An oxidizer such as ozone, air, or chlorine may be used to react with the iron and force it to become particulate iron that can then be removed via filtration. A typical setup would involve the oxidizing unit, a holding tank, then a media filter. This type of system works quite well, but takes some expertise in sizing - you would want a water treatment pro that you trust to help you with this option. Oxidizing filtration media: This type of treatment consists of a sealed tank filled with one of several media. Water passes through and is oxidized and filtered by the media. These are relatively easy to operate and what I would recommend for the average homeowner. There are several different media that can be used: manganese greensand: water runs through for treatment. The media must be regenerated with potassium permanganate. Care must be taken with dealing with potassium permanganate as it readily dies organic material, such as your skin, a purple-brown color. Some people are quite comfortable dealing with the chemical; others are not. Synthetic greensand: This is essentially the same as option (a) but consists of a coating of greensand on a silica sand core so does not require as much backwash flow. Service flow rate is 2 - 5 gpm/sqft. Backwash flow rate is 12 gpm/sqft. birm: This media acts as a catalyst to force oxidation of iron. While it does not need to be regenerated, it does need fairly high dissolved oxygen in the water. If your water does not have adequate dissolved oxygen (and it probably doesn't since it is well water), air injection would be necessary prior to the birm. Additionally, birm requires a minimum pH of 6.8.. Service flow rate is 3.5 - 5.0 gpm per sqft. Backwash flow rate is 11 - 20 gpm, depending upon water temperatures and desired bed expansion. pyrolox: an ore that oxidizes then filters the iron out. It does not need regeneration, but needs to be backwashed (to rinse out the iron) at a high rate. pH range is 6.5 - 9.0. This type of filter works very well, but backwash is critical. Service flow rate is 5 gpm/sqft. Backwash is 25-30 gpm/sqft. Backwash daily. Terminox: Similar to Pyrolox, but a proprietary formula . It does not require as much backwash flow rate and is more resistance to a low pH. The particulars are only available from the company that sells it. Backwash daily. Filox: Also similar to Pyrolox. pH range 5.0 - 9.0....

@aliceinwonderland_id, i have pasted the results. Where is says nn it represents none noted. it might be hard to read but note the first number is the result, the 2nd is national standard and the last number In each row is the min. detected level. Test results where contamination was detected at or above the min. detection level , but not above the national standard. Heavy metals: results national standard: Min. detection level Calcium 153.9 nn 2 Copper . 0.008 1.3 0.004 Magnesium 7 nn 0.1 Potassium 1 nn 1 Silica 15.4 nn 0.1 sodium 46 nn 1 zinc 0.01 5 0.004 Other: chloride 39 250 5 sulfate 66 250 5 results national standard: Min. detection level physical factors: alkalinity (total as CaCO3) 370 nn 20 Turbidity .2NTU 1 0.1 Radiologicals: Gross beta 4.33PCi/L nn 4 Test results where the contaminant was detected above the standard, which is not an EPA enforceable maximum contaminant level. Heavy metals: results national standard: Min. detection level manganese 0.053 0.05 0.004 physical factors: hardness 410 100 10 TDS 550 1 0.01 (total dissolved solids) hm I assume it's ferrous since the water does come out clear, BUT I have to say that the water in the toilet for instance is also clear. I will investigate tomorrow when I go to the property if particles develop after leaving out a cup of water for a while and I will let you know. pls let me know what you think regarding results. btw I did not include any results that tested fine. thanks in advance!