ASTM A888 / CISPI 301 Hubless DWV True ID: 1.96" (49.78 mm) Gravity DWV Spec

2" Cast Iron Pipe Volume & Capacity Calculator

Standard 2" nominal Hubless DWV cast iron soil pipe has an exact inside diameter of 1.96 inches, holding 0.1567 US gallons (1.946 liters per meter) per linear foot. Part of our Pipe Volume Calculator and Drain Pipe Slope engineering suite.

Presets:

Calculated Result

Total Liquid Capacity

Internal Holding Volume

3.135 US gallons

≈ 11.866 litres

Unit Conversions

US Gallons 3.135 gal

Litres 11.866 L

Cubic Feet (ft³) 0.4191 ft³

Cubic Inches (in³) 724.12 in³

Imperial Gallons 2.61 UK gal

Cubic Meters (m³) 0.0119 m³

Filled Water Weight 26.1 lbs (11.9 kg)

Linear Capacity Rate 0.1567 gal/ft

Calculations are based on cylindrical formula $V = \pi r^2 L$. Verify dimensions against manufacturer specs for code submittals.

Pre-Calculated Capacity Table

2" Hubless DWV Cast Iron Quick Reference Chart

Volumetric holding capacity and mechanical dead weight load for 2" cast iron piping filled with wastewater (62.4 lbs/ft³).

Pipe Length (Ft)	US Gallons	Liters	Cubic Feet (ft³)	Water Weight (lbs)	Dry Pipe (lbs)	Total Wet Load (lbs)
1 ft	0.157 gal	0.59 L	0.021 ft³	1.3 lbs	4.0 lbs	5.3 lbs
2 ft	0.313 gal	1.19 L	0.042 ft³	2.6 lbs	8.0 lbs	10.6 lbs
5 ft	0.784 gal	2.97 L	0.105 ft³	6.5 lbs	20.0 lbs	26.5 lbs
10 ft	1.567 gal	5.93 L	0.210 ft³	13.1 lbs	40.0 lbs	53.1 lbs
20 ft	3.134 gal	11.86 L	0.420 ft³	26.1 lbs	80.0 lbs	106.2 lbs
50 ft	7.83 gal	29.7 L	1.05 ft³	65.3 lbs	200.0 lbs	265.5 lbs
100 ft	15.67 gal	59.3 L	2.10 ft³	130.7 lbs	400.0 lbs	531.0 lbs
200 ft	31.34 gal	118.6 L	4.20 ft³	261.4 lbs	800.0 lbs	1062.0 lbs
500 ft	78.35 gal	296.6 L	10.50 ft³	653.5 lbs	2000.0 lbs	2655.0 lbs

Engineering Methodology

How to Calculate 2" Cast Iron Pipe Volume

Exact cylinder geometry formulas applied to ASTM A888 standard dimensions.

Step 1

Determine Inside Radius ($r$)

Divide ASTM inside diameter by 2:

r = 1.96" / 2 = 0.9800"

Step 2

Compute Cross-Section Area ($A$)

Calculate circular cross-sectional flow area:

A = \pi \times (0.9800)^2 = 3.0172 sq in

Step 3

Calculate Linear Foot Volume

Multiply cross-sectional area by 12 inches (1 linear foot):

V_linear = 3.0172 \times 12 = 36.206 cu in/ft

Step 4

Convert to US Gallons & Weight

Divide cubic inches by 231 (cubic inches in 1 US Gallon):

Gal/Ft = 36.206 / 231 = 0.1567 Gal/Ft

Technical Specifications

2" Hubless DWV Cast Iron Profile

Physical dimensions, hanger load requirements, and thermal thresholds.

Outside Diameter (OD)

2.35 inches

59.7 mm

Inside Diameter (ID)
1.96 inches
49.78 mm

Wall Thickness

0.195 inches

ASTM A888 Standard

Max Recommended Flow

24 GPM

Gravity drainage velocity

Bare Pipe Weight

4 lbs/ft

Unfilled iron load

Max Temperature Limit

212°F

Commercial DWV rated

Common Applications for 2" Cast Iron Soil Pipe:

Shower and floor drain discharge branches
Commercial grease waste stacks
Quiet residential waste stacks in multi-story buildings

Primary Specification Note: Standard size for floor drains and multi-fixture bathroom branches requiring zero plumbing acoustic echo.

Size Navigation

Compare Related Pipe Sizes & Schedules

Navigate directly to adjacent nominal diameters or alternate pipe materials.

← Smaller Size 1-1/2" Cast Iron Soil Pipe Master Suite Universal Pipe Volume Calculator Larger Size → 3" Cast Iron Soil Pipe Compare PVC Alternative ⇄ 2" PVC Schedule 40

Expert FAQ Guide

2" Cast Iron Soil Pipe FAQs

Engineering questions and code guidelines for 2" hubless cast iron.

3 Questions Answered

Q1 How many gallons of water are in 1 foot of 2" cast iron pipe?

A standard 2 inch hubless cast iron soil pipe holds 0.1567 US Gallons (0.593 Liters) of water per linear foot.

Q2 How many feet of 2" cast iron pipe hold 1 gallon of water?

It takes approximately 6.38 linear feet of 2-inch cast iron pipe to hold 1 US Gallon of water.

Q3 How much does 2" cast iron pipe weigh full of water?

A full 2-inch cast iron pipe weighs 5.31 lbs per foot (4.0 lbs bare pipe weight plus 1.31 lbs water weight).

Total Liquid Capacity

Unit Conversions

2" Hubless DWV Cast Iron Quick Reference Chart

How to Calculate 2" Cast Iron Pipe Volume

Determine Inside Radius ($r$)

Compute Cross-Section Area ($A$)

Calculate Linear Foot Volume

Convert to US Gallons & Weight

2" Hubless DWV Cast Iron Profile

Common Applications for 2" Cast Iron Soil Pipe:

Compare Related Pipe Sizes & Schedules

2" Cast Iron Soil Pipe FAQs

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