R-Tank Design Tool - Stormwater Storage Tank Calculator

Rest easy knowing your underground storage system is ready to handle severe weather events.

Ferguson Waterworks makes it easy with a FREE storage tank calculator. This tool helps you design your R-Tank to ensure proper storage capacities for your application. Simply fill in the required fields to gain access to our calculator, and we will follow up to see how we can best support your project needs.

"*" indicates required fields

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Project Name*

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Name of Designer

Contact Info

Name*

First Name Last Name

Company*

Address*

City State

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State*

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Zip*

Phone*

Email*

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Best way to contact you?

Phone

Instructions

Launch R-Tank Calculator and fill in the information relevant to your project. Once the information is complete, click "Save as PDF".

Windows users

Click "Save as PDF".
Under the “Printer” drop-down menu, select “Microsoft Print to PDF” or “Save as PDF”. (The exact wording may vary by browser.)
Click “Print”.
When prompted, choose where you want to save the file.

Mac users

Click "Save as PDF".
From the PDF drop-down menu (in the lower-left corner), choose “Save as PDF”. (In Chrome you may be able to skip this step and select “Open PDF in Preview”.)
When prompted, choose where you want to save the file.

After your PDF is saved, click "Next". Upload your PDF and submit your information.

Project Details

Minimum Finished Grade (FT)*

Required Storage Volume (CF)*

R-Tank Invert Elevation (FT)*

Drainage / Grading Plan*

Accepted file types: pdf, jpg, jpeg, png, csv, xlsx, xls, Max. file size: 50 MB.

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Notes

Need Help Using the R-Tank® Design Tool or Additional Support on Your Project?

If you need immediate assistance, click here to find the closest branch. Hours of operation Monday – Friday 8a.m. – 6p.m.

R-Tank Unit Inputs

R-Tank Unit Type

R-Tank:

Loading Criteria

Load Rating:

Finished Surface Type:

R-Tank Unit Footprint and Perimeter

R-Tank Unit Footprint:

R-Tank Units: 0.00

R-Tank Unit Perimeter:

Excavation Footprint and Perimeter

Excavation Footprint:

Excavation Perimeter:

Geogrid Footprint

Geogrid Footprint:

Geogrid Material: N/A

Geotextile Unit Wrap

Material:

Optional Bottom:

Geotextile Excavation Wrap

Material:

Top:

Bottom:

Sides:

Base And Top Backfill Material

Material:

Base Thickness:

Backfill Material:

Primary Elevations

Primary Unit Invert:

Top Backfill Thickness

Stone Storage

Use Stone Storage:

Use Stone Base for Storage:

Use Stone Cover for Storage:

Stone Void Ratio:

Port Quantities

# of Inspection Ports:

Liner

Liner Material:

Location:

Top:

Bottom:

Sides:

System Elevations

Elevations

	Base Inv.	Unit Inv.	Unit Top	Top Stone	Min. Grade	Max. Grade
R-Tank System:	0.00	0.00	0.00	0.00	0.00	0.00

System Quantities

Number of Primary Units: 0

# of Inspection Ports: 0

Required Backfill Material: 0.00 cy

Estimated Geotextile Unit Wrap: 0.00 sf (0 sy)

Estimated Geotextile Excavation Wrap: 0.00 sf (0 sy)

Estimated Liner: 0.00 sf (0 sy)

Estimated Geogrid: 0.00 sf (0 sy)

System Storage Capacities

Total Volume Provided by R-Tank Unit: 0.00 cf.

Total Volume Provided in Stone: 0.00 cf.

Provided Storage Volume: 0.00 cf.

R-Tank Unit Stage Storage Table

Stage Storage Increment:

Elevation:

0.00

Volume:

0.00

Case Studies

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