TROUBLESHOOTING SAND FILTERS
PROBLEM
POSSIBLE CAUSE
REMEDIES
1 - High gauge pressure,
1 - Insufficient backwashing. 1&2 - Backwash filter.
low return flow.
2 - Excessive contaminants or
3 - Use #20 filter sand.
algae in sand.
4 - Replace sand after cleaning
3 - Filter sand is too fine.
underdrain slots.
4 - Underdrain plugged.
2 - Low gauge pressure, low flow.
1 - Water level too low in pool.
1 - Fill pool so water is between
Pump suction drawing in air.
2 - Restriction on suction side of
marks on skimmer face plate.
Pump sounds like marbles
pump.
2 - Clear obstruction in skimmer,
rattling in it.
3 - Skimmer or strainer basket filled
hoses or pump.
with debris.
3 - Clean skimmer and strainer
baskets.
3 - High flow, low or normal
1 - Pool water is chemically out of
1 - Check with test kit or contact
gauge pressure but pool water
balance.
dealer.
will not clear up.
2 - Sand too coarse.
2 - Use #20 filter sand.
3 - Sand grains rounded or worn.
3 - Use crushed #20 filter sand.
4 - Short filter cycles.
1 - Excessive contaminants or algae
1 - Check chemical balance.
in sand or pool.
Filter will require frequent
2 - Improper backwashing.
backwashing.
3 - Sand too fine.
2 - Backwash filter thoroughly.
Waste hose too long or
restricted.
3 - Replace sand with #20 filter
sand.
5 - Sand entering pool.
1 - Defective underdrain.
1 - Replace underdrain.
2 - Sand too fine.
2 - Use #20 filter sand.
6 - Water leaking to waste.
1 - Valve not seated in filter position.
1 - Actuate valve handle and make
2 - Defective o-ring in valve body.
sure valve is seated.
2 - Replace o-ring or contact
dealer.
Note: Contact your pool dealer for any problems you cannot solve.
“the original portable pool”
®
DOUGHBOY RECREATIONAL • 10959 Jersey Blvd., • Rancho Cucamonga, CA 91730-5194
DB 1297-019
Made in the United States of America
Copyright © 1997
Change of Design: Doughboy Recreational expressly reserves the right to
change or modify the design and construction of any product in due course of
our manufacturing procedures, without incurring any obligation or liability to
furnish or install such changes or modifications on products previously or
subsequently sold.
PREVENT
DROWNING
Watch children
at all times.
You can be
permanently injured.
Shallow water.
WARNING
Do not remove or cover.
RESCUE:
NO DIVING!
