Figure 8-4.Ion-exchange unit for water softening.
1. Add grease by a pressure gun to each grease
fitting while the valve is set in service or wash
Every 6 months, each individual valve should
be inspected and tested for leaks and repacked if
Where multiport valves are used, they should be
serviced and lubricated under the manufacturers
instructions. Lubricate this type of valve with
grease as follows:
2. Turn valve one-half turn and add more grease.
3. Give valve several full turns to spread the
This lubrication does not require that the softener
be removed from service, but when the water flow is
stopped, no grease will get into the water.
Quarterly, flush ion-exchange beds with chlori-
nated water containing at least 2 ppm of chlorine. Do
not use water with a hardness greater than 170 ppm,
and be certain that the pH of the water is about neutral.
Also, follow these directions.
1. Check the bed surface for dirt, fines, organic
growths, and smoothness. Scrape excess foreign matter
off and replace with new resin. When the surface is
uneven, the gravel bed underneath is not distributing
the wash water evenly. The remedy consists of
removing the resin and gravel and replacing both in
2. Check the height of the ion-exchange bed
surface; remove or add ion-exchange resin to maintain
proper elevation. (A low elevation will allow excess
fines and foreign matter to accumulate on the surface of
the bed; a high elevation allows resin to be washed out
during backwashing.) Extra ion-exchange resin may be