WHY USE A FLOATING FILTER AS THE
INTAKE ON A
CISTERN?
For most of the same reasons you would use a Floating Pond Filter — to remove only
the cleanest water in the cistern (water nearest the surface).
HOW DOES A FLOATING
CISTERN FILTER DIFFER FROM A
FLOATING POND FILTER?
The only noticeable difference is that the cistern filter removes water from closer to the
surface than a pond filter since there is no algae growth in a cistern. The cistern filter
has a shorter stem length.
HOW LONG DO CISTERN FILTER
ELEMENTS LAST?
Depending on the usage and how efficiently the water was pre-filtered before storage, the
filter elements will last from one to three years. If you use a filtering roofwasher as a
prefilter, you’ll extend the time between filter element changes.
WHAT IS A FILTERING ROOFWASHER
AND HOW DOES IT WORK?
The filtering roofwasher collects rain water from I downspouts, then filters it before it
enters the
cistern. The first rain to fall on a roof washes off dirt and debris which has accumulated
since the last rain. As this first-and dirtiest-water enters the roofwasher, the larger
debris is removed by screens in the “leaf catcher” compartments. This first
water, which never enters the cistern, is collected and held in the bottom “quiet
chamber”. Once the “quiet chamber” fills, additional incoming water begins
passing through the filter element and into the cistern. A small “weep-hole” in
the overflow/clean-out pipe discards the dirty water and allows the “quiet
chamber” to drain between rains.
Benefit: The filtering roofwasher will add years between cistern
cleanings and will greatly improve the quality of cistern water.
HOW IS THE FILTERING ROOFWASHER
CONSTRUCTED?
The Filtering Roofwasher made by Water Filtration Company is constructed of heavy-duty
fiberglass,
PVC, and stainless steel. It uses our standard replaceable filter element.
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WHERE IN THE WATER SYSTEM IS A FILTERING ROOFWASHER INSTALLED?
The roofwasher can be installed at any point in the system between the downspout and
cistern or water storage tank. It may be installed at ground level or partially buried. On
new systems, they are most often installed near the home under a downspout. When
roofwashers are installed on existing systems, it is often necessary to place them at or
near the cistern to accommodate in-place plumbing. They will function equally well at any
of these locations.
WHAT ARE THE ADVANTAGES OF USING A FILTERING ROOFWASHER?
Reduced Organic Matter. The roofwasher minimizes the amount of leaves, twigs, insects and
other matter in the cistern. This, in turn, improves the taste, color and odor of the
cistern water.
Reduced Maintenance. Most cisterns require cleaning at least once per
year. With the roofwasher, the cistern is cleaned every five to eight years.
Easier To Clean. Instead of draining the cistern for cleaning, you can
remove the solids at ground level by simply servicing the roofwasher.
WHAT MAINTENANCE DOES THE
ROOFWASHER REQUIRE?
Roofwasher maintenance is quick and easy. No tools are required.
Large debris is removed from the leaf catcher basket.
Twice a year, you should remove the baffle table and clean the lower chamber with a
garden hose.
The replaceable filter element should be changed every one to two years, depending
on the amount of dirt and debris that collects on the roof.
Benefit: The filter assembly, including tank and piping, are
corrosion-resistant and virtually maintenance-free, designed to provide a lifetime of
service. With the exception of the filter element and twice yearly cleaning, your assembly
should rarely need attention.
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