🌧️ ASME A112.6.9 Siphonic Drains (Full-Bore Flow, Zero Slope Piping & Smaller Dia)

Siphonic Roof Drainage Calculator

Size engineered siphonic roof drainage systems (Geberit / FastFlow / Jay R. Smith) under ASME A112.6.9 & ASPE Standard 45: calculate full-bore negative pressure flow velocity (10-25 FPS with baffled air-induction prevention plates), eliminate horizontal pipe pitching, reduce downspout diameter by 60%, and specialty plumbing profits.

1. Project & Operating Inputs

Roof Surface Area (Square Feet e.g. 120,000 Sq Ft Mega-Warehouse)

Design Rainfall Intensity (Inches / Hr e.g. 4.0" / Hr 100-Year Storm)

Customer Bid Price for Engineered Siphonic Drainage System ($)

Siphonic Baffled Drains, HDPE Electrofusion Welded Pipe & Certified Techs ($)

2. Financial Breakdown & Yield

ASME A112.6.9 SIPHONIC DRAINAGE

Turnkey Siphonic Package Profit

Siphonic Drainage Contractor Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost