Courtesy PacFab Incorporated
| TROUBLESHOOTING GUIDE FOR SAND FILTER | ||
| Problem | Cause | Remedy |
| Pool water not sufficiently clean | 1.Pool chemistry not adequate to
inhibit algae growth 2.Too frequent a backwash cycle 3.Improper amount or wrong sand size 4.Inadequate turnover rate. |
Maintain pool chemistry or consult
service technician. Allow pressure to build to 10 psi above clean filter condition before backwashing. Check sand bed depth and sand size. Run system for longer time. |
| High filter pressure | 1.Insufficient
backwashing. 2.Sand bed plugged with mineral deposits. 3.Partially closed valve. |
Backwash until effluent runs
clear. Chemically clean filter. Open valve or remove obstruction in return line. |
| Short cycles | 1.Improper
backwash. 2.Pool chemistry not adequate to inhibit algae growth. 3.Plugged sand bed. |
Backwash until effluent runs
clear. Maintain pool chemistry. Manually remove top 1" surface of sand bed. Replace with new sand and chemically clean entire sand bed. |
| Return flow to pool diminished Low filter pressure |
1.Obstruction in pump hair and lint
strainer. 2.Obstruction in pump. 3.Obstruction in suction line to pump. |
Clean basket in
strainer. Disassemble and clean pump. Clean skimmer basket. Remove obstruction in lines. Open valves in suction line. |
| Sand returning to pool | 1.Broken underdrain lateral. | Replace broken or damaged laterals. |
| Sand loss to waste | 1.Backwash rate too
high. 2.Improper sand size. 3.Air strainer is damaged or missing. |
Reduce backwash flow
rate. Change to proper sand size. Replaced damaged components. |
| Leak at closure | 1.Improperly tightened
closure. 2.Dirt or contamination. 3.Damaged part. |
Shut off pump, relieve tank pressure,
open air bleeder, tighten closure properly. Shut off pump, relieve tank pressure, open air bleeder, remove closure & all sealing surfaces. Reassemble closure properly. Same as above except replace damaged "O" ring, closure, tank or any combination of parts as required. |
Courtesy PacFab Incorporated
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