De Backwashing - EcoSmarte Pool System Manual

The diatomaceous earth filter for backwash-
ing purposes operates on a similar principle to sand
but will not require a pressure rise. The maximum
pressure rise, usually 12-16 lbs, is more important
with this platform to avoid damage to the filter it-
self, and early backwashing will not hurt the overall

DE backwashing:

a diatomaceous earth filter
The use of the multiport valve is identical to
a sand filter; you must turn off the pump between
each valve handle movement. The DE platform
requires three 2-minute backwashes followed by
rinse to clear, usually less than 30 seconds.
The backwash of a DE filter is designed to
knock down all powder and contaminant from the
Pentair Multiport Valve
Failure to get all used powder at the bottom of the
filter will not allow new powder to coat the grids
evenly. At least twice per year, the grids must be
removed and soaked for trouble free performance.
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DE FILTER TROUBLESHOOTING CHART
Symptom
Powder in the pool
"Murky" water or Oil Slick:
The 60 sq ft DE filter typically contains six or seven fabric "grids" that must be
perfectly maintained with the carriage assembly and grids soaked quarterly.
The filter must be re-assembled squarely and with even tension on the car-
tridge.
filter performance. It may be prudent, for example,
to backwash the filter if the gauge has a 4 lb rise
and the owners or pool service will be gone for sev-
eral days.
grids. Softly slapping the side of the filter after
each rinse cycle will yield optimum results as dirty
powder drops to the bottom of the filter to be rinsed
out.
- Hole in grids
- Valve to separation tank is faulty or
open
- Too much powder in the filter
- Not enough powder in filter
- Grids need to be cleaned
- Grid assembly is cracked
- Breather cap plugged
A one hour soak in five parts water, one part muri-
atic acid and 1 lb TSP (Trisodium Phosphate). It is
usally a good idea to hire a pool professional if this
is your first swimming pool on your first DE filter.
Cause