Homeowner installed a Navien tankless water heater with recirculation, but hot water takes too long to reach master shower because the recirculation line appears to be incorrectly plumbed, causing the heater to shut down when the valve is open.

No consumer-friendly diagnostic tool exists to help homeowners identify plumbing configuration issues (e.g., missing check valve, incorrect recirculation loop) in tankless water heater installations.

Severity

4High

Willingness to Pay

explicit

Added

May 6, 2026

Implied Software Gaps

Consumer-friendly diagnostic tool for tankless water heater recirculation plumbing

App Concept

Tankless Troubleshooter

A mobile app that guides homeowners through diagnosing tankless water heater recirculation issues using step-by-step logic, valve checklists, and augmented reality overlay to visualize correct plumbing. It compares the user's setup to verified installation diagrams and provides clear explanations for common problems like backflow, missing check valves, or incorrect pump settings.

Key Features

Step-by-step diagnostic wizard for recirculation problems
AR camera overlay to check valve positions and pipe connections
Library of verified installation diagrams for popular tankless models
Generate a summary report to share with the plumber

Target Users: DIY homeowners with tankless water heaters who experience long hot water wait times

Revenue Model: $4.99 per diagnostic report or $19.99 annual subscription for unlimited use

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