I just joined the forum. I live in central MN. I have a shallow well that has 5 parts iron, 18 grains of hardness, PH - 7, and what has been described as "medium tannins" I have a Terminox brand Pyrolox filter that uses a chlorine injection system and a Fleet Farm water softener model FFE-1054-M. Specs are 24,600 - 33.400 grain capacity. Water out of the softener has been tested and measured 0 iron, and it is soft. We still have tinted water and get yellow stains on white laundry. I have sent a sample of my water to a lab for tannin analysis and should get results back any day. I am sure that I have tannins. the color does not settle out of the water. I have been doing research on tannin filters and I am going to try to build my own from an Econominder 2500 controller with a 9 x 48 tank that I picked up off Craig's list for $50. I figure the resin and brine tanks are worth more than that even if I have to buy a new controller. The valve and piston were rebuilt in 2002, and the softener was taken out of service in 2007. Like many things, the more I learn, the less I seem to know. I am strongly leaning toward Tanex brand resin because it is supposed to have success with a broad range of tannins. My plan at this time is to put 1 cf of Tanex in the tank all by itself and regenerate with it's own brine tank. I am in the process of cleaning out the resin tank. I removed the head and powered it up. I gave it a manual regeneration and the piston moved and the cam for the brine worked. that's as far as I have gotten. the BLFC sticker says 5 GPM, 1.5# salt per minute. This controller has a meter, but no settings for hardness or people. I don't think that will be a problem for my application, It looks like I can set it to regererate after a set number of gallons. I would like to understand more about the pins behind the timer, According to an article I read Generally, the resin will be brined at approximately 10 lbs per cubic foot salt (NaCl). I am not sure how to make the Econominder 2500 do this. Also, it stated that The anion should be backwashed at a flowrate of approximately two gpm/sf. Can I restrict the flow to achieve this rate?
Also, I was reading a thread here where Ditttohead had this reccomendation:
"Here is my recommendation, this is a very unique system designed specifically for your application.
Stage 1: Minimum, A 9x48 Iron and hydrogen removal system utilizing Pyrolox. Please note that your pump needs to be able to pump 11 GPM to properly backwash the Pyrolox.
Stage 2, an parallel tank system with softening resin in tank 1, and Tannin selective resin in tank 2. This unique design eliminates the need for seperate regeneration cycles for the softener and tannin systems. The softener regenerant wast (chloride) is used to regenerate the tannin resin.
This design requires the addition of a resup feeder to lower the pH of the brine water so as to prevent the precipitation of the caco3 in the anion resin bed."
This sounds like it might work for me. I just wonder how exactly the regeneration would work. mainly achieving the backflow rates listed above, and I am guessing that the brine rinse exit on the softener would be the entrance on the tannin filter, then down the drain? So how would I choose a pounds per cubic foot salt setting for the brine? Am I over thinking all this?
Any advice would be greatly appreciated!