🔧 I. Core Shutdown Procedure

1. Deep-Clean Cartridges

   • Remove cartridges: Cut pump power, relieve pressure, and extract filters.

   • Power-wash: Hose pleats inward→outward (20° angle) to dislodge algae/scale. Avoid high-pressure contact.

   • Degrease: Soak oil-coated filters in 1:10 TSP (Trisodium Phosphate) solution for 1 hour → rinse thoroughly.

   • Dry: Stand vertically in shade (NO sun/heat drying).

2. Drain All Water

   • Empty filter tank: Open drain/air-relief valves until dry.

   • Purge pump: Remove drain plug + pressure gauge; blow residual water with compressed air.

   • Winterize pipes: Reverse-blow lines ≥2 mins (critical for freeze zones).

3. Protect & Store

   • Cartridge storage: Place dried filters in breathable bags (rodent-free, >0°C area).

   • Seal maintenance: Lubricate O-rings with silicone grease; cover equipment with waterproof tarp.

⚠️ II. Critical Don'ts & Risk Control

• NEVER:
  ❌ Store damp cartridges → mold/fiber damage.
  ❌ Use acid cleaners (e.g., HCl) → skeleton corrosion.
  ❌ Skip pump draining → casing cracks ($200+ repair).

• Safety:
  🔹 Wear goggles + gloves (TSP burns skin).
  🔹 Limit air pressure to ≤30 PSI (prevents pleat damage).

📅 III. Pro Maintenance Tips

❄️ IV. Freeze-Climate Add-ons

• Pipe Antifreeze: After blowing lines, inject pool-safe antifreeze (e.g., R.V. Antifreeze):

  text

  
  

  Pipe Diameter | Per 10 ft Usage  
  --------------|-----------------  
  1.5"          | 0.25 gal  
  2"            | 0.5 gal  

• Insulation: Wrap filter/pump with fire-retardant foam (ArmaFlex) + rain cover.

💎 Expert Tip: At restart, run OLD cartridges 24hrs first to trap debris ("dirty startup"), THEN install new ones. Replace if pressure drop exceeds 10 PSI vs. clean baseline.