h2x review

h2x is the most plumbing-focused design tool on this list. You place pipes and components, connect them, and the software runs the sizing. For domestic water it automates flow rate calculations, pipe sizing and pressure balancing, and h2x says those calculations are verified by CIBSE standards and aligned with ASHRAE methods. For wastewater it automates fixture loading, pipe sizing and gradient checks. Drawings and reports update as the design changes, and the output can be a custom PDF drawing set, a CAD file mapped to your templates or a Revit model, plus a calculation report and a bill of materials. The same product also covers stormwater, gas, fire protection and HVAC. The company reports more than 5,000 paying users and 140,000 designs completed. The main gap for buyers is price, which is quote only, so we scored value conservatively. US engineers should also confirm how it handles their local plumbing code during a trial.

Who it is for

plumbing designers who want sizing and drawings in one tool

Price

See vendor pricing (USD check pending).

US price check pending. See the vendor pricing page.

Key features

• Domestic water design with automated flow rate calculations, pipe sizing and pressure balancing
• Wastewater design that automates fixture loading, pipe sizing and gradient checks
• Stormwater, gas, fire protection, heating and chilled water modules
• Drawing exports as a custom PDF, a CAD file mapped to your templates or a Revit model
• Calculation reports and a bill of materials for pricing

Strengths and weaknesses

• Strength: Covers both supply and drainage sizing with drawings and reports kept in sync
• Strength: Exports to Revit without designing inside Revit
• Strength: h2x reports 5,000+ paying users in 40+ countries
• Weakness: No published price; you request a quote
• Weakness: Domestic water calculations reference CIBSE and ASHRAE, so US users should confirm UPC or IPC fixture unit settings for their jurisdiction
• Weakness: Not a full building model platform for coordinating other trades

Key facts

• Price: On request
• Plumbing modules: Domestic water, wastewater, stormwater, gas
• Exports: PDF drawing set, AutoCAD, Revit, bill of materials
• Users: 5,000+ paying users, per h2x

Where it ranks

h2x is No. 2 in our Best Plumbing Design Software verdict.