Car Wash Water Recycling: Sand Filter System

Hand car wash, six 55-gal half-barrels for wash water. Dump/refill 5–6×/day costly. Asks filtration to reuse water.

Sand Filtration + Backwash

1. Pass water through sand filter.
2. Backwash (reverse flow) when pressure drops.
3. Need pump for backwash or replace sand.

Practical Setup

• Collect water in pit.
• Pump through small sand filter.
• Use residual pressure for washing.
• Backwash when flow declines.

Low-cost, green solution. Sand filters are standard for this.