GITNUXSOFTWARE REVIEW
Manufacturing & EngineeringTop 10 Best Pump Sizing Software of 2026
Compare pump sizing software tools for selecting the right fit, including KSB EasySelect and Pipe Flow Expert, for engineering workflows.
How we ranked these tools
Vendors set the topic, but our editors set the inclusion criteria and the evaluation framework before research starts.
Search agents gather the source set and the review record, including transcriptions of video reviews and podcasts.
Framework: Features 40% · Ease 30% · Value 30%
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Pipe Flow Expert is the best fit for hydraulic engineers validating pump curves against realistic system head losses, because its duty-point overlay checks that operating point against the computed system curve. KSB EasySelect is the cleaner alternative for teams standardizing on KSB selections, since outputs follow KSB product data for repeatable documentation.
Editor’s top 3 picks
Three quick recommendations before you dive into the full comparison below — each one leads on a different dimension.
Pipe Flow Expert
Pump curve overlay validation that checks the selected duty point against the computed system curve and head loss results.
Best for: Fits when hydraulic engineers need pump curve validation tied to realistic pipe head loss assumptions.
KSB EasySelect
Editor pickDuty-point driven pump selection tied directly to KSB product data sheets with configuration-aware outputs.
Best for: Fits when engineering teams need consistent KSB pump selection outputs with minimal manual rework.
PUMP-FLO
Editor pickBuilt-in pump curve overlay tied to computed system curve head lets users validate the operating point within the same sizing run.
Best for: Fits when mechanical teams need repeatable pump selection using curve overlay and system head calculations.
Comparison Table
Pipe Flow Expert
SMBPipe network design software that calculates pump requirements and operating conditions.
Pump curve overlay validation that checks the selected duty point against the computed system curve and head loss results.
Pipe Flow Expert focuses on end-to-end pump sizing calculations that connect pipe hydraulics inputs to pump selection and operating point checks. It supports pump curve overlay workflows so the resulting duty point can be validated against the chosen pump performance across the system curve.
The software also models friction loss drivers like pipe roughness and fitting effects, which helps produce consistent total dynamic head inputs for pump efficiency and hydraulic power estimates. Exportable calculation outputs and a repeatable project structure make it easier to rerun selections when duty flow, suction conditions, or control valve assumptions change.
- +Pump curve overlay workflow ties system curve assumptions to the operating point.
- +Pipe hydraulics inputs include friction loss drivers like roughness and fittings.
- +Project-based model makes it fast to rerun pump selections after input changes.
- +Reports capture pump selection and head calculation results in one output set.
- –Complexity rises quickly when modeling suction conditions and cavitation margins.
- –Automation depth beyond interactive calculation is limited compared with API-first tools.
- –Pumps and hydraulics datasets still require manual data quality checks.
- –Workflow support for multi-scenario batch studies is not as streamlined.
water distribution consultants
Model network pump requirements across design cases
Reviewed network design results
mechanical equipment designers
Compare valves and pumps in networks
Design comparison for equipment choice
Show 2 more scenarios
piping engineers
Iterate pipe size under pressure-drop limits
Repeatable pipe sizing decisions
Adjusts diameters and fittings while modeling roughness and total dynamic head for pump sizing.
engineering review teams
Rerun scenarios with traceable assumptions
Faster refinement with audit trail
Keeps a repeatable project structure so alternative suction and valve assumptions can be rechecked.
Best for: Fits when hydraulic engineers need pump curve validation tied to realistic pipe head loss assumptions.
KSB EasySelect
vertical specialistKSB selection software for configuring pumps and related equipment.
Duty-point driven pump selection tied directly to KSB product data sheets with configuration-aware outputs.
KSB EasySelect supports pump selection workflows that map duty-point requirements to product lines and published performance data. The tool combines hydraulics-driven selection with structured output that teams can reuse across projects without manually reconciling tables.
It also supports configuration choices that affect the operating envelope and the resulting performance claims. KSB EasySelect is best evaluated on how consistently it reproduces the same operating-point result when inputs like fluid properties and system assumptions are held constant.
- +Selection output is structured for repeatable project documentation
- +Uses published pump performance data to drive operating-point decisions
- +Handles configuration options that change hydraulic performance
- +Works well when teams standardize on KSB pump families
- –Limited fit for non-KSB catalogs and cross-vendor comparison
- –Complex inputs can slow iteration when system assumptions change
- –Export options may not match every internal calculation workflow
- –Less suitable for custom what-if modeling beyond the selection flow
pump specification engineers
Map duty points to KSB product data
Consistent operating-point selections
project engineering teams
Reuse selection outputs across projects
Less selection rework
Show 1 more scenario
fluid systems analysts
Test operating envelope under fixed inputs
Stable results under controlled inputs
Checks whether changes to fluid and system assumptions keep the operating point aligned.
Best for: Fits when engineering teams need consistent KSB pump selection outputs with minimal manual rework.
PUMP-FLO
vertical specialistPump selection software that matches pumps to system duty requirements.
Built-in pump curve overlay tied to computed system curve head lets users validate the operating point within the same sizing run.
PUMP-FLO’s core sizing flow takes duty requirements like flow rate and pressure head and turns them into total dynamic head via static head and head loss calculations. The workflow then matches the demand to pump curve data using an overlay approach that clarifies the predicted operating point. Configuration is centered on engineering inputs and repeatable scenarios rather than deep IT-style controls.
A key tradeoff is that PUMP-FLO’s automation is most effective inside the sizing tool itself rather than across external design systems through documented API workflows. Teams get the best outcome when standard pump curves, pipe loss assumptions, and scenario libraries are kept stable for frequent reruns of the same design basis.
- +Tight coupling between system curve calculation and pump curve overlay
- +Scenario reruns keep design basis consistent across iterations
- +Operating point prediction reduces manual head and flow matching
- +Engineering input structure fits common pump selection workflows
- –Less visible API and automation surface for external design systems
- –Best results depend on clean curve data and loss assumptions
- –Limited evidence of enterprise governance controls for shared models
- –Fluid properties coverage may not cover unusual compatibility edge cases
Mechanical engineering teams
Select pumps from curve overlay
Faster, more consistent selections
Project engineering coordinators
Run scenario iterations on designs
Fewer manual recalculation errors
Show 1 more scenario
Maintenance and upgrades teams
Validate retrofit pump match
Reduced retrofit selection risk
Uses updated piping and duty requirements to re-check operating point against available pump curves.
Best for: Fits when mechanical teams need repeatable pump selection using curve overlay and system head calculations.
Grundfos Product Center
vertical specialistOnline Grundfos tool for selecting, sizing, and configuring pumps.
Manufacturer-scoped selection flows that keep inputs, model options, and selection outputs aligned to Grundfos catalog data.
Grundfos Product Center is most useful when the selection process must stay grounded in a specific manufacturer catalog and model-level configuration options. It supports interactive selection inputs, then produces selection results that can be cross-checked against pump curve behavior and required duty targets. Teams can reduce rework by reusing saved application inputs for similar system designs and by quickly iterating on alternative pump choices.
- +Catalog-grounded selections with model-level configuration inputs
- +Fast iteration for duty point adjustments during early design
- +Curve-based validation around pump operating behavior
- +Reusable application inputs help standardize repeat projects
- –Narrower comparison depth for non-Grundfos pumps and equivalents
- –Less suitable for fully custom pipeline modeling beyond catalog assumptions
- –Limited visibility into deeper calculation steps compared with spreadsheet workflows
- –Selection outcomes can require manual review of edge-case constraints
Mechanical design engineers
Select pumps for repeatable circulation loops
Faster pump shortlists
Project managers
Standardize pump choices across projects
Lower selection rework
Show 2 more scenarios
Specification teams
Draft model-specific pump schedules
More consistent procurement specs
Generate selection outputs tied to specific Grundfos models for inclusion in submittals.
Commissioning engineers
Validate selected pumps against duty targets
Reduced mismatch risk
Cross-check candidate operating conditions against expected pump curve performance from selection results.
Best for: Fits when teams standardize on Grundfos and need quick duty-target pump selections with curve checking.
Wilo-Select
enterprisePump selection and system design software from Wilo covering commercial building and HVAC applications.
Pump curve overlay tied to Wilo model selection and operating point verification within one workflow.
Wilo-Select is a pump sizing workflow tool tailored to Wilo product selection and specification tasks. It guides inputs for duty point selection and pumps that match the required operating envelope on pump curve overlays.
- +Wilo catalog selection workflow ties duty point inputs to available pump models
- +Pump curve overlay view supports fast operating point checks during selection
- +Outputs are aligned to manufacturer configuration instead of generic sizing only
- +Standard selection inputs cover common hydraulic requirement fields
- –Best fit depends on Wilo hardware availability rather than open-model comparisons
- –Limited support for detailed system curve modeling beyond basic hydraulic inputs
- –Export and integration depth are not aimed at custom engineering automation
- –Does not replace end-to-end network simulation for complex pipe networks
pump designers
Match duty points to Wilo operating envelopes
Validated duty-point fit
mechanical specification teams
Standardize selection around Wilo catalog models
Fewer ad hoc spec edits
Show 1 more scenario
water and utility engineers
Confirm pump sizing in repeat design cycles
More consistent specifications
Supports standardized workflows where required operating conditions need frequent reruns.
Best for: Fits when Wilo pump selections must be specified quickly from duty point requirements.
DP-Select
SMBPump selection program from DP-Pumps with hydraulic data, performance curves, speed control data, and comparison function.
Duty point driven selection ties pump curve matching to a defined operating point, not just rating point outputs.
DP-Select performs pump selection and sizing workflows by combining pump curves with system curve inputs to land on a defined operating point. The workflow is built around duty point creation, fluid properties, and head loss breakdown so selections align with suction and discharge constraints.
- +Tight linkage between pump curves and system curve inputs
- +Duty point workflow reduces misalignment between assumptions and selection
- +Head loss breakdown supports traceable total dynamic head calculations
- +Exports selection results for documentation and engineering handoff
- –Advanced scenarios depend on manual data entry for detailed setups
- –Automation depends on integrations that are not as frictionless as specialist tools
process system engineers
Land an operating point from curves
Operating point aligned to constraints
engineering consultants
Compare flow and head variants
Clear variant selection comparison
Show 1 more scenario
documentation-focused project teams
Export selections for downstream review
Reusable outputs for reports
Imports inputs and exports selection outputs for engineering documentation and review packages.
Best for: Fits when engineering teams need repeatable pump sizing with auditable curve-based calculations and consistent exports.
Sulzer Select
enterpriseOnline pump configuration tool from Sulzer allowing selection by operating conditions or pump size with PDF curve output.
Pump curve overlay that visualizes candidate fit to the specified operating point across a selectable flow range.
Sulzer Select is built around an end-to-end pump selection process that starts from a duty requirement and produces a selection result set with performance information suitable for pump selection discussions. The workflow supports pump curve overlay to visualize how candidate pumps meet the operating point across a range of flows. It also takes fluid and system-related inputs so engineers can account for selection sensitivity to duty conditions and performance limits.
- +Pump curve overlay to validate operating point behavior during selection
- +Guided duty inputs reduce selection ambiguity across repeat projects
- +Fluid and performance inputs improve fit for non-water services
- +Exportable outputs support internal review and submittal workflows
- –Best results when selecting within Sulzer pump catalogs
- –Limited help for vendor-agnostic headloss and system curve build workflows
- –Curve checks can require manual interpretation for edge cases
- –Complex duty scenarios may need supporting spreadsheets outside the tool
Mechanical engineers
Select pumps for duty and head requirements
Faster operating point sign-off
Project engineering teams
Standardize pump selection across builds
Reduced rework during review
Show 2 more scenarios
Process engineering groups
Size pumps for non-water fluids
Fewer performance mismatches
Incorporates fluid inputs to keep pump performance checks aligned to service conditions.
Engineering managers
Prepare review-ready selection packages
Clearer decision records
Generates selection outputs that can be packaged for internal engineering review.
Best for: Fits when engineering teams need repeatable pump selection with curve validation and exportable documentation for Sulzer hardware.
Intelliquip Select
enterpriseDuty-point pump selection platform connecting selection, configuration, pricing, and order entry for fluid handling manufacturers.
Reusable selection configurations that keep duty point and curve-based comparisons consistent across review cycles.
Intelliquip Select pairs pump sizing workflows with an engineering configuration layer that focuses on repeatable selections rather than ad hoc calculations. It supports pump curve overlay style comparisons to place the operating point against manufacturer performance data.
- +Traceable pump selection inputs with consistent outputs across iterations
- +Pump curve overlay workflows to validate duty point placement
- +System head breakdown supports friction loss and static head assumptions
- +Configuration reuse reduces manual re-entry during design cycles
- –Hydraulic edge cases can require careful input discipline to avoid misleading operating points
- –Limited visibility into manufacturer data quality when curves are incomplete
- –Workflow depth can feel heavy for simple one-off selections
- –Automation surface is less transparent than some pump niche tools
engineering operations teams
Run repeatable pump sizing configurations
Repeatable selection results
design review consultants
Trace system inputs to TDC and TDH
Traceable hydraulic assumptions
Show 1 more scenario
automation-minded engineering teams
Reduce manual re-entry during updates
Less manual data handling
Uses controlled configuration outputs to minimize rework when design reviews require iterations.
Best for: Fits when teams need repeatable pump selections and curve-based validation in controlled engineering workflows.
PumpIQ
SMBPump selection software from Gusher Pumps with dynamic curve generation, impeller trimming, and NPSH calculations.
Pump curve overlay workflow links duty point targets to computed operating points across scenarios.
PumpIQ from gusher.com targets pump sizing and system checks with a workflow built around pump curve and system curve overlays. It supports selection inputs for duty point targets and then computes operating points with modeled head loss split into static and friction components.
- +Curve overlay workflow ties duty point targets to operating point calculations
- +Static and friction loss modeling helps validate total dynamic head for selections
- +Scenario iteration speeds comparisons when flow rate or fluid properties shift
- +Repeatable calculation setups reduce rework across similar pump selection cases
- –Fewer built-in automation hooks than API-first sizing tools for bulk work
- –Fluid property handling requires careful input quality to avoid misleading selections
- –Limited coverage for uncommon pump control strategies beyond basic operating checks
- –Governance and audit visibility for team workflows is not as granular as some competitors
pump sizing engineers
Overlay pump and system curves for duty fit
Duty fit against curves
hydraulics analysts
Separate static and friction head impacts
Clear head-loss breakdown
Show 2 more scenarios
project engineers
Iterate pumps across a flow range
Faster pump comparison
Compares alternative pumps and configurations across multiple flow rates using repeatable setups.
engineering teams handling imports
Recalculate after piping or fluid changes
Less recalculation effort
Supports imports and repeatable calculation structures to reduce rework when inputs change.
Best for: Fits when engineering teams need repeatable pump selection checks with curve overlays and scenario comparisons.
Flowserve Affinity
enterpriseWeb-based pump selection tool from Flowserve covering 80-plus products with duty-point input and performance curve generation.
Duty point to pump curve overlay workflow that keeps operating point decisions tied to manufacturer performance charts.
Flowserve Affinity targets pump sizing work where engineers need repeatable selection based on manufacturer product data and consistent performance assumptions. The workflow centers on duty point inputs and pump curve overlay so teams can visualize the operating point against available pump performance.
- +Pump curve overlay ties the duty point to available performance ranges
- +Affinity-law style scaling supports rapid speed and configuration trade studies
- +Efficiency and hydraulic power outputs help size motor and energy expectations
- +Manufacturer-focused selection assumptions reduce mismatch between sizing and product data
- –Workflow emphasizes manufacturer curve usage over broad third-party curve libraries
- –Limited visibility into head loss build-ups when complex pipe models are required
- –Operating envelope checks can require multiple iterations when constraints tighten
- –Requires disciplined input control to keep repeated selections consistent
site reliability engineers
Reuse duty-point assumptions for recurring selections
Consistent selection outputs
mechanical design engineers
Validate operating point on pump curve overlays
Operating point verified
Show 1 more scenario
design optimization teams
Run affinity-law what-if speed checks
Faster what-if screening
Performs affinity-style scaling to test speed and configuration changes before locking selections.
Best for: Fits when engineers need manufacturer-aligned pump curve overlays for repeatable duty point selections.
Conclusion
After evaluating 10 pump sizing software, Pipe Flow Expert stands out as our overall top pick — it scored highest across our combined criteria of features, ease of use, and value, which is why it sits at #1 in the rankings above.
Use the comparison table and detailed reviews above to validate the fit against your own requirements before committing to a tool.
Frequently Asked Questions About Pump Sizing Software
Which pump sizing tool is most suitable for overlaying pump curves onto a computed operating point?
How do PUMP-FLO and DP-Select differ in how they compute system head and land on an operating point?
When does configuration reuse matter more than raw calculation depth?
What breaks if a team relies only on rating point outputs instead of validating against a system curve?
Which tools provide the strongest selection traceability for documentation workflows?
How do imports and reusable setups change the iteration workflow when piping or fluid properties change?
Which option is best when the plant standardizes on one manufacturer catalog?
What integration capabilities should be evaluated for downstream automation and controlled provisioning?
How do teams handle RBAC-style admin controls and auditability during multi-user selection reviews?
Tools reviewed
Primary sources checked during evaluation.
Referenced in the comparison table and product reviews above.
How to Choose the Right Pump Sizing Software
In pump sizing software, options mainly differ in how well they map your inputs to validated calculation logic and how tightly they let you manage results for different scenarios. The biggest separator is whether formulas and assumptions hold up for real systems—especially for head loss handling and output traceability.
Calculation transparency and assumptions
Why it matters
Calculation transparency and assumptions determines whether you can explain a computed selection when stakeholders ask what drove the result. In pump sizing work, hidden defaults can quietly shift outputs.
How to check
Run a small scenario twice: once with your full set of inputs and once leaving key fields blank, then compare outputs and the listed assumptions. Ask the demo team to show where the software sources or stores default assumptions used in each run.
Input model coverage for pumping systems
Why it matters
Input model coverage matters because sizing is only as good as the inputs the software can represent. If the tool can’t model your actual configuration, you end up compensating outside the software and losing trust.
How to check
Use a sample project that includes your suction conditions, fluid temperature/viscosity, and piping layout. Check whether the UI supports the fields you typically need (and whether it forces generic placeholders) and whether outputs change when you adjust those fields.
Result export with traceable reports
Why it matters
Result export with traceable reports is what turns calculations into repeatable work across revisions and audits. If you can’t export a report showing inputs and computed outputs, you’ll struggle to compare alternatives.
How to check
Generate a report for a scenario and export it to a common format. Confirm the export includes your inputs, version/version-like settings, computed values, and timestamps, not just a final recommendation.
Scenario management for design revisions
Why it matters
Scenario management helps when you iterate quickly across duty changes or constraints without losing context. The tool should preserve intent so later edits don’t overwrite earlier decisions.
How to check
Create two closely related scenarios (e.g., change one operating input) and ensure both results remain accessible. Verify you can label scenarios, compare outputs side-by-side, and retrieve prior results without re-running everything.
Pump and curve library data handling
Why it matters
Pump and curve library data handling affects accuracy because many tools rely on stored performance data. If the software can’t manage data quality or update library entries, outputs may drift from what you intended to analyze.
How to check
In the demo, locate where the tool stores pump performance data and test whether you can import or edit entries. Confirm the tool flags missing/limited data coverage and shows what dataset each result used.
Red flags
- Outputs change when you leave fields blank without showing the default assumptions
- Reports export only final numbers and omit inputs used to compute them
- Library edits don’t clearly identify which dataset was used in a saved scenario
Fit by situation
- If we must justify results to others and keep audit-ready records, prioritize Calculation transparency and assumptions.
- If our team runs many what-if design revisions, prioritize Scenario management for design revisions.
- If we rely on specific stored performance datasets, prioritize Pump and curve library data handling.
Funding and competing interests
This study was co-funded by several of the vendors assessed in it. No single vendor funded it. Funders could propose the market studied.
They had no role in selecting vendors, setting or weighting criteria, analysing data or drawing conclusions, and they received the same factual-accuracy check as every other vendor assessed.
Market definition, inclusion rules and criteria weights were fixed by an editor before research began and did not change afterwards. Editorial process →
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