Lack of space inside a steel stud wall for standard sanitary tee fittings when installing back-to-back sink drains requires use of double wye fittings, causing uncertainty about code compliance and optimal layout.

No low-profile alternative to double wyes for tight wall spaces is available or known, forcing reliance on potentially non-optimal fittings.

Severity

2Mild

Willingness to Pay

implied

Added

May 14, 2026

Workarounds Described

Uses double wye fittings instead of separate sanitary tees due to lack of space

App Concept

TightSpace DWV

TightSpace DWV is a line of compact, code-compliant drain-waste-vent fittings designed for confined wall cavities. Offers ultra-low-profile double wye and sanitary tee combinations that save space without compromising flow or slope. Reduces guesswork and rework during rough-in.

Key Features

Ultra-compact design for 3-inch ABS/ PVC
Integrated slope indicators
Meets ASTM and UPC codes
Pre-assembled double wye and cleanout options

Target Users: Plumbers and contractors installing multi-sink commercial or residential drains in tight wall spaces

Revenue Model: $12-18 per fitting sold through plumbing supply distributors; wholesale discounts for bulk orders

Existing Solutions Mentioned

Double wye fittings

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