Sewage smell and washing machine drainage issues caused by improper installation of P-trap and siphonage due to building plumbing.

The installed aerator valve and P-trap configuration fails to prevent siphonage and allows sewage air to enter, and contractor refuses to fix properly.

Severity

4High

Willingness to Pay

implied

Added

May 14, 2026

Workarounds Described

uses a P-trap box intended to prevent sewer gas
installed an aerator valve that lets air out instead of in

App Concept

SewerGuard Valve

A smart, easy-to-install anti-siphon valve and P-trap system for washing machine drain lines that automatically seals against negative pressure and blocks sewer gases. It replaces traditional mechanical aerators with a reliable, self-cleaning check valve design that works in multi-story buildings.

Key Features

Self-sealing silicone diaphragm that prevents siphonage under negative pressure
Built-in check valve to block sewage gases
Transparent housing for easy inspection
Universal fit for standard 1-inch drain hoses
No maintenance required

Target Users: Renters and homeowners in apartment buildings or multi-story homes with shared plumbing who experience sewer gas or drainage issues from washing machines.

Revenue Model: $19.99 one-time purchase per unit, replacement diaphragm kits $4.99

Existing Solutions Mentioned

P-trapaerator valve

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