Resin Replacement Guide
( When, Why, and How )
When or Why to replace your softening resins.
First let me say that is has been my experience that the resins in your water softener will usually out last the control valve. Examination of resin tanks over 20 years old found the resins to still be capable of the ion exchange ( which is the process by which your water is softened ). Some depletion of the amount of resin occurred in some of the systems over 20 years old. And modern day resin has improved slightly, but replacement is not needed as often as some would lead you to believe.
* How much resins should be in the tank?
Tanks 44" and taller normally are only 55% - 60% full when new.
* When should you replace your resins?
1. The number one reason to replace your resins is because they have been damaged by years of exposure to chlorinated "city" water. After about 10 years ( can be much sooner, or a bit later ) the resins "swell" and then they break down. They become so fragmented the "fines" collecting at the bottom distributor start to restrict the water pressure through the resin tank. This is generally how you "know" you need new resins. On some systems the fragments ( "Fines" ) will start coming into the house and clogging faucet screens.
Your Resins look like this ( color many vary ) >
2. When the resin bed has become contaminated by a noticeable and usually visible amount of algae growth ( This problem is common in tanks installed outside ).
3. When the resin tank has a large amount of fine sand in it. This sometimes happens on well water. It is always recommended to have a sediment prefilter installed in the water line before your water softener. This fine sand in the resin bed will cause you to have very poor water pressure. The only way to solve the problem is to dump ( or suck ) out all the resins and sand. Replacing with new resins is a whole lot easier than trying to sift the sand out of your old resin.
4. When a resin tank has been sitting unused for months or years, and a strong odor is detected from the resins. You can try cleaning with a weak chlorine solution, but odds are you will need to dump the resins, bleach out the tank ( with a strong chlorine solution ) and start with fresh new resins.
5. Resins "fouled" by Iron and Organics can usually be cleaned by adding a heavy dose of resin cleaner ( such as ResUp, Iron Out, Citric Acid, or Bleach ). Of course replacing with new works every time.
How To Replace Your Resins
1. Turn off water, unplug control valve from electric outlet, disconnect control valve from water lines, drain line, and brine line.
NOTE: We do not recommend gravel for residential water softeners with tank diameter's under 13 inches.
How Much Resins To Use
|Tank Size||Amount of Resins||Gravel Underbedding|
|7" x 44"||0.50 cu. ft.||NONE|
|8" x 35"||0.64 cu. ft.||NONE|
|8" x 44"||0.75 cu. ft.||NONE|
|9" x 35"||0.75 cu. ft.||NONE|
|9" x 40"||1.00 cu. ft.||NONE|
|9" x 48"||1.00 cu. ft.||NONE|
|10" x 35"||1.00 cu. ft.||NONE|
|10" x 40"||1.00 cu .ft.||NONE|
|10" x 44"||1.25 cu. ft.||NONE|
|10" x 54"||1.50 cu. ft.||optional 16 lbs.|
|12" x 48"||2.00 cu. ft.||NONE|
|12" x 52"||2.00 cu. ft.||optional 20 lbs.|
|13" x 54"||2 - 2.50 cu. ft.||optional 35 lbs.|
|Other sizes - tank dimensions|
|Tank Diameter - How To Measure|
Water Softening Resins-
We only sell commercial grade resins
We only sell premium grade, high capacity, gelular, sulfonated, polystyrene cation resin supplied in the sodium form as moist, tough, uniform, spherical beads.
Typical Resin Specification
"White" Resins( for Tannin or Color Removal )
A special layer added to regular resins to remove color in well water caused by tannic acid ( a yellow to brown tint ).
Not Sure What You Need?
Please Ask, We Can Help.
For other MEDIA ( Carbon, Greensand, Birm, Calcite, etc ),
see: Other MEDIA replacement GUIDE
Need To Choose A Resin Type?
See This Article:
What is the Difference?