Unable to install washing machine due to lack of a dedicated drain in old Japanese apartment, uncertain if under-sink plumbing can be adapted.

No clear guidance or standardized adapter exists for connecting a washing machine drain to an under-sink cleanout in old Japanese plumbing systems.

Severity

3Medium

Willingness to Pay

implied

Added

May 22, 2026

App Concept

DrainMate Adapter Finder

An app that helps homeowners identify the correct plumbing adapter for non-standard drain setups. Users upload a photo of their under-sink plumbing, and the app uses image recognition to suggest compatible adapters and installation instructions, eliminating guesswork and plumbing visits.

Key Features

Photo-based plumbing fitting identification
Database of international and local adapter standards
Step-by-step installation guide with local safety codes
Direct links to purchase recommended adapters

Target Users: New homeowners and renters in older apartments, especially expats unfamiliar with local plumbing

Revenue Model: Freemium with $4.99 per adapter identification or $9.99/month subscription for unlimited identifications and expert chat

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