PlumbingProduct Selection & Quality4HighHomeowner$ explicit
Homeowner with a 1939 bathroom needs to replace a cracked commercial flushometer toilet with an 8-inch rough-in, but modern toilets don't support that rough-in, risking damage to original tile work.
No modern toilet manufacturer offers an 8-inch rough-in bowl, and plumber says adapter solutions won't work, leaving only demolition or rare used parts.
57
0
Opp. Score
57
Severity
4High
Willingness to Pay
explicit
Added
May 8, 2026
Workarounds Described
- searching Facebook Marketplace for a unicorn toilet
- hiring a plumber who says demolition is needed
Implied Software Gaps
- A platform that connects homeowners with rare toilet parts and retrofit specialists without requiring demolition
App Concept
RoughIn Retrofit
RoughIn Retrofit is a specialized marketplace and compatibility engine that helps homeowners and plumbers find and purchase rare rough-in toilets, adapters, and custom flanges. It matches users with vintage toilets, 3D-printed adapters, or retrofit kits, preventing tile destruction. Users list their rough-in measurements and get matched with available solutions nationwide.
Key Features
- Measurement input for rough-in, bowl shape, and flush type
- Marketplace for vintage and NOS toilets
- Custom adapter design service (3D-printed or metal)
- Step-by-step retrofit guides with plumber referrals
Target Users: Homeowners and plumbers dealing with non-standard rough-in toilets in historic homes (pre-1950) across the US.
Revenue Model: Freemium with $9.99 per listing fee for sellers, 10% commission on adapter sales, and $49/year premium subscription for priority matching and plumber directory access.
Existing Solutions Mentioned
plumber consultationFacebook Marketplace
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