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Untitled Water Pipe Sizing

Pressure & velocity

Source pressure200kPa20.4 m headResidual pressure110kPa11.2 m headIndex pipe length20mHeight difference10mVelocity limit2.4m/sPipe materialCopper · AS 1432

Demand

Dwellings20units2.64 L/s

Loading units20LU0.38 L/s

Fixed flow0L/s0.00 L/s

Minimum Recommended Pipe SizeDN50Copper

Total design flow3.02 L/s

Pump duty estimate3.02 L/s @ 220 kPa

Residual pressure110 kPa

Pipe capacity table

Pipe diameter	Max flowL/s	Velocity at max flowm/s	Approx. max loading unitsLU	Max dwellings	Governing limit
DN15	0.05	0.57	0.5	0	Limited by available pressure
DN20	0.18	0.79	4.0	0	Limited by available pressure
DN25	0.41	0.98	26.5	0	Limited by available pressure
DN32	0.79	1.16	75.6	2	Limited by available pressure
DN40	1.33	1.33	137.8	6	Limited by available pressure
DN50Minimum recommended	3.02	1.64	458.7	24	Limited by available pressure
DN65	5.64	1.93	1,458.5	65	Limited by available pressure
DN80	9.06	2.17	2,905.8	129	Limited by available pressure
DN100	18.23	2.40	6,784.4	331	Limited by max velocity

Flow rate counter

Optional

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How it works

Run a cold water sizing check in a clear step-by-step workflow.

Clarus Studio currently focuses on Quick Mode water pipe sizing: pressure inputs, demand assumptions, route length, material selection, live results, and report export.

Run your first sizing check

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Enter the design basis

Add pressure, demand, pipe route, height difference, velocity limit, material, and calculation method.

Review the recommendation

See the recommended DN size, residual pressure result, velocity check, and pump duty estimate.

Keep the basis visible

Inputs, assumptions, method, and results stay together for easier review.

Export the record

Generate a clearer calculation record instead of relying on scattered spreadsheet notes.

Features

Built for hydraulic engineers, designers, consultants, and practical site teams.

Hydraulic engineers and designers

For quick cold water sizing checks during early design, option testing, and coordination.

Hydraulic consultants

For keeping the sizing basis, selected pipe size, pressure result, and review record in one place.

Plumbers and builders

For fast visibility into pipe size, flow, and pressure implications before the work becomes harder to change.

Roadmap

Live now: Water and Stormwater Quick Mode. More workflows are planned.

Live now

Water and Stormwater Quick Mode for pipe sizing, pressure or hydraulic checks, comparison tables, and exportable records.

Coming next

Advanced Water Mode for project-based hydraulic workflows and richer saved calculation management.

Planned later

Gas, sanitary drainage, drawing extraction, and broader engineering workflows.

Advanced Mode coming soon