Hidden assumptions
Pressure, demand, pipe material, velocity limits, and route assumptions are often buried across spreadsheet tabs or cell notes.
Built for hydraulic design
Hydraulic calculations, without the spreadsheet.
Size water, stormwater and gas systems in one clear engineering workspace. Keep the inputs, method, result and report together from first check to final record.
Untitled Water Pipe Sizing
Pressure & velocity
Demand
2.64 L/s
0.38 L/s
0.00 L/s
Recommended pipe sizeDN50Copper
Total design flow3.02 L/s
Pump duty estimate3.02 L/s @ 220 kPa
Residual pressure110 kPa
Pipe capacity table
| DN | Max flow | V at max | Max LU | Dwellings | Details |
|---|---|---|---|---|---|
| DN15 | 0.05 | 0.57 m/s | 0.5 | 0 | Limited by available pressure |
| DN20 | 0.18 | 0.79 m/s | 4.0 | 0 | Limited by available pressure |
| DN25 | 0.41 | 0.98 m/s | 26.5 | 0 | Limited by available pressure |
| DN32 | 0.79 | 1.16 m/s | 75.6 | 2 | Limited by available pressure |
| DN40 | 1.33 | 1.33 m/s | 137.8 | 6 | Limited by available pressure |
| DN50Recommended | 3.02 | 1.64 m/s | 458.7 | 24 | Limited by available pressure |
| DN65 | 5.64 | 1.93 m/s | 1,458.5 | 65 | Limited by available pressure |
| DN80 | 9.06 | 2.17 m/s | 2,905.8 | 129 | Limited by available pressure |
| DN100 | 18.23 | 2.40 m/s | 6,784.4 | 331 | Limited by max velocity |
Flow rate counter
Optional
Standards compliantSave hours per projectTrusted by engineersEnterprise grade securityBuilt for water, gas & stormwaterAudit-ready PDF reportsVersioned project historyStandards compliantSave hours per projectTrusted by engineersEnterprise grade securityBuilt for water, gas & stormwaterAudit-ready PDF reportsVersioned project history
Why it exists
Stop rebuilding pipe sizing checks from messy spreadsheets.
Pipe sizing spreadsheets vary from company to company, and sometimes from person to person. Inputs, formulas, assumptions, and calculation methods can be hidden across different tabs, cells, and layouts. Clarus puts the sizing basis, method, result, and record into one clearer workflow.
Manual review
Reviewers may need to trace formulas, check pipe table logic, and rebuild the calculation basis by hand.
Different methods
Some workflows use AS/NZS 3500 references, others use Barry’s method or company-specific assumptions. Clarus makes the selected method visible.
Weak records
The selected pipe size is often separated from the assumptions and checks that produced it.
Run a free pipe sizing check
Free account required. No credit card.
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
Create a free account to access Quick Mode.
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
Live now
Water and Stormwater Quick Mode for pipe sizing, pressure or hydraulic checks, comparison tables, and exportable records.
Coming next
Coming next
Advanced Water Mode for project-based hydraulic workflows and richer saved calculation management.
Planned later
Planned later
Gas, sanitary drainage, drawing extraction, and broader engineering workflows.
Advanced Mode coming soon