Elite Software S-Pipe review

S-Pipe does one job: it computes pipe sizes for hot and cold domestic water supply in residential and commercial buildings, with a virtually unlimited number of pipes. You enter each pipe section by its start and end node, pipe type, length, fittings and fixtures, and S-Pipe picks the smallest size that stays within your maximum velocity and maximum pressure drop per 100 feet, using the Hazen-Williams equation. It follows ASHRAE and ASPE procedures, supports codes such as UPC and IPC, and lets you use the Hunter GPM curve or your own. Reports list GPM flow, velocity and pressure loss for each section, plus a bill of materials with labor. At $499 once, it is the cheapest code-based supply sizing tool we found with a published price. The limits are that it does not draw, and its drawing link only works with old 32-bit AutoCAD MEP releases, so most users will key the system in by hand.

Who it is for

engineers who need supply pipe sizing reports

Price

$499 one-time license.

Price: $499
Quoted from the vendor pricing page on November 11, 2026.

Key features

• Sizes both hot and cold water supply systems using ASHRAE and ASPE procedures
• Supports plumbing codes such as UPC and IPC
• Uses the Hunter GPM curve or your own demand curve
• Hazen-Williams friction calculation with limits on velocity and pressure drop per 100 ft
• Bill of materials with labor costs

Strengths and weaknesses

• Strength: One-time $499 price with no subscription
• Strength: Built-in data for copper, cast iron, PVC and PEX, and all data can be edited
• Strength: Functional demo available to download
• Weakness: Calculation only; it does not draw the layout
• Weakness: Drawing import works only with 32-bit AutoCAD MEP 2008 to 2012 and Autodesk Building Systems 2006 to 2007
• Weakness: Drainage sizing needs a separate program, D-Pipe

Key facts

• Price: $499 one-time
• Methods: ASHRAE and ASPE, Hunter GPM curve
• Codes: UPC, IPC and others
• Platform: 32-bit and 64-bit Windows

Where it ranks

Elite Software S-Pipe is No. 3 in our Best Plumbing Design Software verdict.