Flo-Well Calculator | Dry Well Sizing & Backfill Tools

By NORMA Group

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Drainage Solutions
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Residential Solutions NDS provides residential drainage systems for stormwater management, runoff control and flood prevention with easy-to-install solutions.

Commercial Solutions NDS provides commercial drainage systems for stormwater management solutions across a wide variety of commercial applications.

Industrial Solutions NDS delivers industrial drainage solutions to manage stormwater, prevent flooding, and maintain compliance—scalable for any project size.

Government Solutions NDS stormwater solutions help government projects meet compliance standards, protect public spaces, and manage runoff effectively.

Golf, Parks & Rec Solutions NDS offers drainage solutions for parks, golf courses, and sports fields. Mitigate runoff, prevent flooding, and keep outdoor spaces safe.

DOT - Highways & Road Solutions NDS offers DOT approved stormwater drainage management solutions for roads, highways and infrastructure. Load-rated and built for heavy traffic.
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Drainage

Permeable Pavers

Landscape

Irrigation

Valve, Meter, Telecom Boxes & Covers

Valves

Pipe Connections

Clamps

Channel & Trench Drains

French Drain Systems

Catch Basins

Dry Well Drainage Systems and Kits

Grates

Pop-Up Drain Emitters

Drainage Fittings

StormChamber Systems

Tufftrack® Grass Pavers

EZ Roll® Grass Pavers

EZ Roll® Gravel Pavers

EZ Marker™ Stakes & Parking Delineators

Root Barrier Panels

Root Barrier Rolls

Trunk Protector

Point of Connection

Tubing

Dripline

Single Outlet Emitters

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Irrigation Fittings

Irrigation Accessories

Standard Series Valve Boxes

Pro-Spec Series Valve Boxes

Telecom Boxes

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SureFit™ Universal Valve Box Lids

Universal Locking Mechanism

Check Valves

Specialty Valves

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Backwater Valves

Compression Fittings and Unions

Pro-Span® and Pro-Span® Compact™ Expansion Repair Couplings

Flo-Lock™ Gripper Couplings and Adapters

Flexible PVC Rubber Couplings

Flexible Saddles and Rigid Saddles

Triple Swing Joints

Pinch Clamps

Clamp-All® Couplings and Torque Wrenches

Hose Clamps

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Channel & Trench Drains

French Drain Systems

Catch Basins

Dry Well Drainage Systems and Kits

Grates

Drainage Fittings

StormChamber Systems

Point of Connection

Tubing

Dripline

Single Outlet Emitters

Multioutlet Emitters

Irrigation Fittings

Irrigation Accessories

Micro Channel Drains

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Spee-D® Channel Drains

Pro Series Channel Drains

Dura Slope® Channel Drains

Dura Slope® EZ-Track™ Radius Couplings & Grates

BG-FILCOTEN® Trench Drains

EZflow® Gravel-Free French Drain System

NDS Square Catch Basins

NDS Round Spee-D Catch Basins

Catch Basin Universal Outlets and Drain Adapters

Catch basin drainage kits

NDS Flo-Well Dry Well

Square Drain Grates

Round Drain Grates

Atrium Drain Grates

Sewer and Drain Fittings

Corrugated Fittings

Downspout Adapters

DWV-SCH40 to S&D Adapters

Cleanouts & Plugs

Variable-angle Fittings

Pool & Deck Accessories

18 in. High StormChamber® Systems

34 in. High StormChamber® Systems

41 in. High StormChamber® Systems

StormChamber® Accessories

Control Zone Kits

Drip Zone Kit

Filters & Pressure Regulators

Spray-to-Drip Conversions

Hose End Timers

Polyethylene Tubing

Flexible Irrigation Pipe – Swing Riser and IPS Flex Systems

Dura Flo™ CV Check Valve Dripline

Dura Flo™ PC Pressure Compensating Dripline

Dura Flo™ PC Heavy Duty Dripline

Dura Flo™ JR Dripline with Non-PC Emitters

AccuFlow™ Pressure Compensating Emitters

Dial-a-Flo™ Adjustable Bubblers

Hydro-Flo™ Jets and Assemblies

Take-a-Part™ Flag Emitters

Tri-Flo™ Spraysticks

Cuatro-Flo™ Pressure Compensating Bubblers

Hydro-Port™ Adjustable Flow Bubblers

Micro Fittings

Insert Fittings

Compression Fittings

Threaded & Socket Adapters

Smart Loc™ Multidiameter Fittings

Swing Pipe Fittings

Risers

Stakes

Sod Staples

Tubing Accessories

Valves

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Resources

Specifications & Document Library Looking for tech specs, installation details, user manuals, drawings, reference materials, and other resources? Browse our library or use the filters to quickly find and download exactly what you need.

NDS Product Catalog

Calculators From drainage to dripline, French drains to storm chambers, NDS calculators and tools can help you figure out the details.

Case Studies Learn how NDS solutions solve project challenges, reduce installation time and cut costs. Explore our library of case studies and success stories below.

Price Books

Video Library From educational videos, to installation guides and product demos, our videos help Professionals and DIY-ers tackle any drainage or irrigation challenge with confidence.

Articles Explore the NDS Article Library for helpful tips, how-to guides, and educational information to help you manage water more effectively.

Load Ratings Important information on the load-bearing capacity of NDS stormwater management systems. Helps engineers and contractors assess the strength and durability requirements for a wide range of product needs.

Contractor Tools & Resources
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About NDS

About NDS With 50+ years of expertise, NDS offers efficient drainage solutions for stormwater management. Read the company history and strategic vision.

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NDS Culture

Career Development NDS empowers employees with career development programs, training, and certifications. Build your future with us—learn more today!

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By NORMA Group

Rational Method

Q=CiA

Q=Runoff Flow Rate
C=Runoff Coefficient
i=Rainfall Intensity
A=Area

Gravel Specifications

Gravel depth beneath Flo-Well (Dimension A) in feet.
Gravel thickness around Flo-Well (Dimension B) in feet.

Illustration of gravel needed around and below an NDS Flo-Well Dry Well