Difficulty finding a 1/2 NPSM female to 3/4 NPT male adapter to connect service valves to a tankless water heater with mismatched fittings.

No readily available adapter for the specific NPSM-to-NPT thread conversion needed for this water heater model.

Severity

4High

Willingness to Pay

implied

Added

Jun 11, 2026

App Concept

ThreadMatch Adapter Finder

A database and marketplace app for plumbing adapters. Users input the two thread types and sizes, and the app shows compatible adapters, inventory from suppliers, and allows direct purchase. No more guessing or scouring forums.

Key Features

Thread type identification via photo or manual input (NPT, NPSM, BSP, etc.)
Cross-reference database of adapters with real-time supplier inventory
Direct purchase links or ordering within the app
Installation guides and compatibility notes

Target Users: Plumbers, HVAC technicians, and DIY homeowners installing gas or water appliances with non-standard fittings in the US and Canada.

Revenue Model: Free app with affiliate commissions on adapter sales; premium subscription ($4.99/mo) for unlimited searches and supplier price comparison.

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