Purenex Multipure Aquaversa for model MP750SB - Manual (Page 24)

Problem Cause Remedy
Taste/Odor (general) The carbon block filter may become saturated w ith
the taste and odors it adsorbs. Change the filter
Rotten egg odor Typically a sign of H2S (hydrogen sulfide) gas
w hich can occur at any time. It is recommended that you keep tw o filter cartridges
on hand. When one becomes saturated w ith odor,
remove it and allow it to dry upside (threaded-hole)
dow n on a paper tow el. The sulfur gas w ill dissipate,
allow ing the cartridge to be reused. Rotating
cartridges in this manner w ill, in some cases, help
extend the life of the filter.
Odor & odd color on cartridge H2S (hydrogen sulfide) caused by iron
(orange/brow nish), manganese (blackish), and/or
decaying organisms (slimy/blotchy colors) can
cause rotten egg-type odor. Change of filter cartridge is the only recommended
course of action.
“Milky” color in w ater Higher than normal w ater pressure through the
System w ill create small bubbles. Air bubbles do
not effect the performance of the system. Air can
be trapped inside the lid of the housing. For a countertop installation, turn on the w ater and
engage the diverter valve w hile reducing the w ater
flow slightly. For a below the sink installation, adjust
the w ater pressure at the feedw ater adapter below
the sink. Turn on the ledge faucet or diverter valve
and let w ater run for 3 to 5 minutes after installation or
filter change.
Flow rate is slow Solids: The filter is designed to become restricted
in its flow rate w hen the filter becomes clogged
w ith particulate and other contaminants. When
your w ater flow rate slow s to the point that it is
inconvenient to use, it is time to change your filter. It is recommended that filters be replaced at least
every tw elve months or w hen its capacity is reached,
w hichever comes first. If w ater pressure is too low ,
adjust w ater pressure to 60 psi. If other faucets or
sprinklers are on turn off other running w ater.
Water is black Carbon dust Allow w ater to run through the unit to w aste for
approximately 20 minutes to flush the filter.
X V. Tr o u b l e s h o o t i n g
Maintenance Problems
24
Flushing / disinfecting the unit housing: Multi-
Pure recommends that you not allow water to sit in
a unit for extended periods of time without it being
used. If a unit is left unused for more than 10 days,
it may need to be flushed/disinfected before you
resume use.
Stuck / Sticking Diverter Valve: Normally caused
by a mineral (calcium) buildup around the diverter
stem. There are two methods for solving this prob-
lem (Vegetable Oil or Vinegar).
If these methods don’t work, it may be neces-
sary to replace the diverter valve. Please con-
tact Multi-Pure Customer Service at
800-622-9206 for assistance.
To flush a unit that may be contaminated:
1. Confirm that water is turned off to the unit.
2. Relieve the water pressure (if below sink unit) by opening the unit faucet.
3. Remove and discard the used filter.
4. Clean & rinse out the inside of the housing.
5. Add 5 to 7 drops of bleach, such as Clorox™ or Purex™ (5 ¼% sodium hypochlorite) to the
bottom canister.
6. Reconnect the housing top and bottom without the replacement filter.
7. Turn on water and let unit housing fill up with the water/bleach solution.
8. Allow unit to soak for at least 30 minutes.
a. Countertop Units: To disinfect the spout, place your finger over the tip of the spout and turn
the unit upside down. Repeat this procedure 2 or 3 times during the 30-minute soak period.
b. Below Sink Units: To disinfect the faucet spout, remove the spout and place it in a container
with one-quart of water and bleach (use 5 drops of bleach) and allow to soak for 30 minutes.
9. After the housing has soaked for 30 minutes, disassemble the top and bottom and pour out the
water/bleach solution. Rinse out the inside of the housing.
10. Replace the filter (cartridge) following the instructions with the new filter.
11. Follow the instructions with the replacement filter for reconnecting and flushing your unit.
Vegetable Oil (Using vegetable oil to lubricate the diverter valve does not dissolve the mineral
deposits which build up and cause the sticking; thus it will be necessary to repeat this procedure
from time to time)
1. Unscrew diverter valve from faucet.
2. Pour a little vegetable oil in the inlet hole.
3. Pull the diverter valve stem in/out several times to lubricate it thoroughly.
4. Replace diverter valve on faucet.
Vinegar (Using vinegar to dissolve the mineral deposits may cause discoloration)
1. Unscrew diverter valve from faucet.
2. Soak diverter valve in vinegar for 10 minutes.
3. Rinse and replace diverter valve on faucet.
Diverter Stem Stuck (If diverter stem is not operating properly - sticking)
1. Disconnect diverter valve from faucet.
2. Push pin in -- if you can push the pin easily, there was air in the tubing.
3. Reconnect diverter valve.