Filter for just the cold water tap at the kitchen sink

I have a concrete lined shallow well at my mountain cabin that yields very soft water which is clear and tastes OK, but slowly stains toilet tanks to a dark brown color. I am advised that the brown is due to the action of bacteria that live off the iron in the granitic soil in my location. While the brown stain is no problem, recent tests show that the water also flunks current total coliform tests, but is negative for fecal coliform.

I'm considering a filter for just the cold water tap at the kitchen sink, which would be installed in a 1/2" PVC vertical pipe. My concern is that the filter automatically drain when the rest of the house plumbing is drained, as it often is, since the cabin is left unheated in freezing weather.

Do you make a filter than can be mounted so that the cartridge is horizontal, and will drain when the whole house is drained, without special intervention?

The brown stains usually indicates that your water may have tannins which are very common with shallow wells. Total coliform is also common as coliform exist everywhere.

We carry 3 piece commercial filter w/3/4" ports you reduce it to 1/2" which can be installed in any position. When all drained out simply unscrew the sump, remove the ceramic cartridge and make sure you air drye for at least 24 hrs. before store it away.

To see the filter picture/specs is similar to one of the following link:
http://www.doultonusa.com/doulton_water_filters/Imperial-high-flowrate-RegentI.htm
Should you have further questions please contact us.