Better Water LLC; rev. Apr 2017
Page 8 of 20
Cartridge Based Pyrogen Filtration System
(2-4 Filters)
Operator Manual
DISINFECTING OVERVIEW
The Cartridge Based Pyrogen Filtration system is disinfected as a component of the Post-
Treatment and/or Distribution Segment of the water treatment system. The disinfecting schedule
is determined by the Medical Director and the results of bacteria and endotoxins test, but Better
Water LLC recommends disinfecting monthly.
The use of typical household bleach (5.25%) is common for use in disinfecting water treatment
systems for hemodialysis. Bleach is a cost effective disinfectant and generally produces
satisfactory results. Varying concentrations of Sodium Hypochlorite (bleach) are used among
dialysis facilities for disinfection.
a.
5.25% household bleach is 50,000 ppm Sodium Hypochlorite
b.
6% household bleach is 60,000 ppm Sodium Hypochlorite
Better Water LLC recommends using IRON FREE bleach. Care should be taken to select iron
free bleach because many discount or generic brands will have high iron content. Iron will be
harmful to the equipment and shorten its lifespan.
* WARNING: DO NOT USE "SPLASH-LESS" BLEACH. The content of "splash-less" bleach
may damage the equipment, and will create foam.
* WARNING: Ozone should not be used as a disinfectant on the Cartridge Based Pyrogen
Filter System, because the filters will be damaged.
BLEACH SOLUTION FOR TANK FEED SYSTEMS
- NOTE: Bleach will only be used on Tank Feed Systems
a.
500 ppm solution of sodium hypochlorite (
bleach
)
This is 1 gallon (128 ounces) of bleach per 100 gallons of water or a
1:100 dilution
5.25% = 500 ppm dilution
Water Gallons x 1.28 = ounces of bleach 5.25%
6% = 600 ppm dilution
Water Gallons x 0.96 = ounces of bleach 6%
* Total water gallons should include gallons in the tank as well as the loop.
b.
Recommended dwell time is
30-60 minutes
* See Appendix A for other bleach dilution ratios and pipe volume calculations, and 3 feet
per second flow velocity rates if needed.
RENALIN / MINNCARE SOLUTION FOR DIRECT FEED or TANK FEED
SYSTEMS
- NOTE: Renalin / Minncare can be used on Direct Feed or Tank Feed Systems
a.
1% Renalin / Minncare solution at a 1:25 dilution
This is 750 ml (25.36 ounces) of Renalin / Minncare per 25 gallons of water or
1:25 dilution
* Total water gallons should include gallons in the tank as well as the loop.
b.
Recommended dwell time is
2-4 hours
DISINFECTING PROCEDURE
1.
The Cartridge Based Pyrogen Filter System is disinfected as a component of the Post-
Treatment and/or Distribution Segment of the water treatment system. Better Water LLC
recommends that this filter assembly be disinfected monthly or more often if necessary.
2.
Slowly open and close the bypass valve a few times during the disinfect process to allow the
bypass ball valve and associated piping to be disinfected.
3.
Slowly open and close the sanitary sample ports a few times during the disinfect process to
allow these ports to be disinfected.
