Replacing ion exchange resin
If the content of dissolved solids in the treated water exceeds 30 ppm TDS (approx. 2 grains per
gallon) according to the meter, then the resin must be changed. We first recommend that you briefly
interrupt the water supply, shake the cartridge and then slowly turn the water supply back on and fill-
up. The mixing and flow rate restriction will help use up the last of the resin.
a)
Emptying used resin. See Fig. 4 below.
1.
Close ball valve 1) and 2) at the cartridge inlet and outlet. Leave the Puropal-Pro connected
to the untreated water tap 3).
2.
Connect hose to drain valve 4) and insert it into the supplied water-permeable collection
sack. Tightly connect the sack to the top of the hose with a cable binder or tape.
3.
Open the drain valve 4).
4.
Open ball valve 1) at the inlet.
5.
Let the resin drain out and then close the ball valve in inlet 1) again.
6.
Let the cartridge drain and then close drain valve 4).
7.
If the collection sack is dripping with resin, then dispose of it in the household waste.
Figure 4:
Emptying used resin
Open the drain valve on the cartridge only
when replacing the resin and only if a
hose is connected to the collection sack.
Under no circumstances should you
connect the drain valve to a water supply
system.
