🚨 NFPA 20 Spring-Loaded Pressure Relief Valve (150% Pump Flow GPM), Waste Cone

Fire Pump Pressure Relief Valve & Waste Cone Calculator

Size main over-pressure relief valves and open/enclosed sight waste cones for diesel fire pump installations under NFPA 20: calculate relief valve flow capacity (GPM sized for 150% pump rated flow preventing diesel engine overspeed over-pressurization of downstream sprinkler heads), discharge pipe diameter, and contractor margins.

1. Project & Operating Inputs

Fire Pump Rated Capacity (GPM e.g. 1,000 GPM Diesel Fire Pump)

System Maximum Working Pressure (PSI e.g. 175 PSI Flange Limit)

Customer Bid Price for Supplied & Piped Relief Assembly ($)

UL/FM Spring Relief Valve, Enclosed Waste Cone, Discharge Piping ($)

2. Financial Breakdown & Yield

NFPA 20 MAIN RELIEF VALVE

Turnkey Relief Assembly Profit

Fire Protection Contractor Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost