Elite Software D-Pipe review

D-Pipe is the drainage partner to S-Pipe. It calculates pipe and vent sizes for sanitary building drain systems with a virtually unlimited number of sections, sizing branch, sewer and stack pipes and branch and stack vents according to UPC or IPC. It follows the ASPE Databook, and you can define as many custom sizing code files as you need for local amendments. Each section takes a node pair, a type, length, material, fittings and connected fixtures, or you can enter a DFU value directly. Reports cover project data, pipe sizes, vent sizes and a bill of materials with labor and material cost. At $299 once it is the cheapest code-based drainage sizing tool we found. As with S-Pipe, it does not draw, and its CAD link only supports old 32-bit AutoCAD MEP versions, so plan on entering the system by hand.

Who it is for

engineers sizing drainage and vents

Price

$299 one-time license.

Price: $299
Quoted from the vendor pricing page on November 11, 2026.

Key features

• Sizes branch, sewer and stack pipes plus branch and stack vents to UPC or IPC
• Follows the methodology in the ASPE Databook
• Custom sizing code files for local codes
• Direct DFU entry per pipe section as a shortcut
• Bill of materials with material and labor costs

Strengths and weaknesses

• Strength: Lowest one-time price on the list at $299
• Strength: Up to 96 fixtures, unlimited fittings and 60 material types per material file
• Strength: Can analyze existing systems by fixing pipe sizes
• Weakness: Calculation only; no drawing tools
• Weakness: Drawing import is limited to 32-bit AutoCAD MEP 2008 to 2012 and Autodesk Building Systems 2006 to 2007
• Weakness: Supply sizing needs S-Pipe, sold separately

Key facts

• Price: $299 one-time
• Codes: UPC, IPC and custom code files
• Method: ASPE Databook
• Platform: 32-bit and 64-bit Windows

Where it ranks

Elite Software D-Pipe is No. 5 in our Best Plumbing Design Software verdict.