Sand Replacement Guide for Pool Filters

• Rubber gloves

• N95 respirator

• Sand vacuum tool

• Nylon bristle brush

• Garden hose

• Silicone-based lubricant

De-energize pump motor. Set multiport valve to "Closed" position. Release system pressure via air relief valve.

2.Disassembly

Use filter wrench to remove tank clamp. Carefully lift off upper manifold assembly. Protect central standpipe during disassembly.

3.Media Removal

① Extract 90% old sand using industrial vacuum

② Flush residual particles with low-pressure washer

③ Inspect lateral assemblies for cracks (replace if >3 laterals damaged)

4.Tank Sanitization

Apply sodium hypochlorite solution (100ppm) for biofilm removal. Scrub diffuser plate with non-abrasive cleaner.

5.Media Loading

① Install protective cap on standpipe top

② Pour graded sand in 3" layers

③ Tamp each layer using vibration technique

6.Reassembly

Replace O-ring with manufacturer-approved seal. Apply lubricant in groove channel only. Torque clamp bolts to 15-18 ft-lbs in crisscross pattern.

7.Commissioning

Initiate startup sequence:

Backwash cycle (5 mins) → Rinse cycle (2 mins) → Normal operation

  Single-grade media: 36 months

  Multi-layer media: 60 months

• Maintain 6" freeboard space below tank rim

• Perform 24-hour hydration before first use