Need to add a fourth output (tub spout) to a 3-way shower diverter system without replacing the entire control valve.

Existing 3-way diverter valves do not support a fourth output, and adding an inline diverter on the wand path is complex and may have flow/pressure issues.

Severity

2Mild

Willingness to Pay

implied

Added

Jun 6, 2026

App Concept

QuadFlow Diverter Kit

A compact 4-way diverter valve that replaces standard 3-way models, enabling control of shower head, rain head, hand wand, and tub spout from a single control point. Designed for retrofit into existing showers without repiping, with built-in flow balancing for consistent pressure.

Key Features

4-way rotary or push-button selection
Retrofit-friendly, fits standard 3-way rough-in boxes
Built-in flow compensation to maintain pressure across all outlets
Easy DIY installation with included adapter plates

Target Users: Homeowners and plumbers in the U.S. who need to add a tub spout to an existing 3-function shower system

Revenue Model: $89-$129 retail per kit; distributes through plumbing supply stores and online

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