A plumbing worker cannot find a test plug that fits a sewer washout pipe because the 3" plug is too small and the 4" is too large, and needs an in-between size.

No standard test plug available for pipes with diameters between 3 and 4 inches, requiring plumbers to improvise or waste time searching.

Opp. Score

Severity

4High

Willingness to Pay

implied

Added

May 20, 2026

App Concept

FlexiPlug Adjustable Test Plug

An expandable test plug that adapts to non-standard pipe diameters (e.g., 3.25"–3.75"). Uses a flexible rubber bladder and ratcheting mechanism to seal securely without needing exact sizes. Eliminates the need for multiple plugs and makeshift solutions.

Key Features

Adjustable diameter range covering 3" to 4" with continuous expansion
Ratcheting or screw-driven pressurization for easy sealing
Pressure rating up to 10 psi for sewer tests
Durable rubber construction compatible with sewage and chemicals

Target Users: Plumbers and sewer contractors dealing with non-standard pipe sizes, especially in residential and commercial repair work.

Revenue Model: $29.99 per unit one-time purchase; subscription for replacement rubber bladders

Existing Solutions Mentioned

Oatey 33402 End-of-Pipe Gripper Plugs, 3 in

Part of App Idea

A plumbing worker cannot find a test plug that fits a sewer washout pipe because the 3" plug is too small and the 4" is too large, and needs an in-between size.

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