Cannot determine if a specific 4-inch 4-clamp no-hub coupling can be used underground for joining cast iron to ABS pipe.

Lack of clear guidance on whether a specific coupling type (4-clamp no-hub) meets code for underground transition between cast iron and ABS.

Severity

3Medium

Willingness to Pay

implied

Added

May 1, 2026

Workarounds Described

posts question to online forum to get advice

Implied Software Gaps

Instant, authoritative, location-specific code and material compatibility database for plumbing connections

App Concept

CodeComply Connector Guide

A mobile app that instantly tells plumbers which pipe connectors are code-compliant for their specific state, material transition, and application (underground, above-ground, etc.). Pulls from up-to-date plumbing codes and manufacturer specs, with photo recognition to identify coupling types.

Key Features

Photo identification of coupling type
State-specific code lookup for pipe material transitions
Application-based recommendations (underground, above-ground, etc.)
Integration with local code databases for real-time updates

Target Users: Plumbers and plumbing contractors in the US, especially those who frequently install underground drainage systems and work with multiple pipe materials.

Revenue Model: $9.99/mo per user subscription or $99/year premium tier with offline access and code updates

Existing Solutions Mentioned

shielded bands

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