After replacing and repairing shower valve cartridges, hot water flow slowly reduces to a trickle and stops unless valve is turned past a certain point, indicating an unresolved mechanical issue.

Workarounds Described

• replacing hot and cold valves multiple times over 20 years with Danco aftermarket valves
• using repair kits and silicone lubricant to fix hard-to-turn valves
• turning hot water past half turn to maintain steady flow

Implied Software Gaps

• A diagnostic tool that measures flow and pressure to pinpoint the cause of intermittent flow reduction without trial-and-error part replacement
• A guide that explains the relationship between valve position and flow stability in aging plumbing systems

ValveFlow Diagnostic

A mobile app and sensor kit that helps homeowners and plumbers diagnose shower valve flow problems by measuring pressure, flow rate, and valve position in real-time. Provides step-by-step troubleshooting guides and identifies specific causes like worn seals, debris, or pressure imbalances.

Existing Solutions Mentioned