Plumber needs to understand IPC wet venting rules for a space-constrained shower and lav installation but is uncertain about code compliance for offset and rolled fitting configurations.

Workarounds Described

• posts on reddit forums to get code interpretations
• manually reads code book and tries to apply to own layout
• asks local inspector for advice

Implied Software Gaps

• Instant code compliance checking for arbitrary venting layouts with spatial constraints

VentCode Comply

VentCode Comply is a mobile and web app that lets plumbers draw their proposed venting layout on a blueprint-like interface and instantly checks against IPC (and local amendments) for compliance. It uses 3D modeling to flag violations like improper offsets or wet vent length limits, and suggests code-compliant alternatives. No more guessing or forum trawling.