A new toilet's tank-to-bowl bolts leak persistently despite multiple replacement gasket kits and installation attempts, likely due to a hairline crack or design flaw.

Off-the-shelf gasket kits fail to seal because the tank bottom is flat, causing bolts to sit at an angle, and the user cannot identify if a crack exists without a professional diagnostic tool.

Severity

4High

Willingness to Pay

explicit

Added

Jun 7, 2026

Workarounds Described

sandpaper sanded inside and outside of tank around washer area
3/8 inch wooden spacer between tank and bolt to reduce compression
10 repeated disassembly/reassembly attempts with different kits
water in tank overnight test without installation on bowl

Implied Software Gaps

App with ultrasonic sensor to detect cracks in ceramic
Augmented reality instructions showing correct bolt alignment and torque

App Concept

LeakSeeker Pro

A smartphone accessory that uses ultrasonic or pressure-sensing technology to pinpoint hairline cracks in toilet tanks and bowls. Combined with a precision-fitting bolt gasket kit that adapts to uneven surfaces, it provides a permanent seal. No more guesswork or wasted trips to the hardware store.

Key Features

Ultrasonic crack detection scanner that connects to phone via Bluetooth
Custom-molding gasket kit that conforms to flat or angled tank bottoms
Step-by-step guided installation with AR overlay
Pressure test mode to verify seal before final installation

Target Users: DIY homeowners and plumbers installing new toilets or repairing leaks

Revenue Model: $49.99 one-time for the scanner + $19.99 per refill gasket kit

Existing Solutions Mentioned

Home depot heavy duty tank to bowl kitAmazon replacement tank to bowl kitCone gasket kit

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