A homeowner needs to add a washing machine and laundry sink drain to an existing sink drain but is unsure if the existing venting is sufficient and whether it will cause drainage issues.

Workarounds Described

• manually draws plumbing diagram and posts on Reddit for advice

Implied Software Gaps

• Plumbing code compliance checker app that validates vent sizing and fixture unit loads for DIY modifications

DrainVent Pro

A plumbing design and code-checking app that allows homeowners and DIYers to input their existing drain/vent configuration and proposed additions, then automatically evaluates code compliance (e.g., wet vent sizing, fixture unit loads). It provides clear yes/no answers with explanations, eliminating guesswork and preventing costly mistakes.