🏖️ NSF/ANSI 50 (High-Rate Sand Filters 15 GPM/sqft, Backwash Velocity 15-20 GPM/sqft)

Commercial Pool Sand Filter Calculator

Size high-rate horizontal and vertical fiberglass sand filters for commercial municipal and resort swimming pools under NSF/ANSI 50: calculate filter bed surface area (Sq Ft @ 15 GPM/sq ft filtration rate), calculate reverse backwash water flow rate (15 to 20 GPM/sq ft to expand filter sand media by 20% to 25%), size multi-port valve headers, and aquatic piping margins.

1. Project & Operating Inputs

Total Pool Recirculation Flow (GPM e.g. 750 GPM Central Pump Flow)

Filtration Face Velocity (GPM / Sq Ft e.g. 15.0 GPM / Sq Ft High-Rate)

Customer Bid Price for Supplied & Piped Fiberglass Filter Skid ($)

Pentair Commercial Sand Tanks, Spec #20 Silica Sand, Butterfly Headers ($)

2. Financial Breakdown & Yield

NSF/ANSI 50 COMMERCIAL FILTERS

Turnkey Commercial Filter Array Profit

Commercial Aquatic Mechanical Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost