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HVAC, Plumbing, Electrical, or other field serviceInstallation & Assembly2MildOwner$ implied

A DIY plumber needs to know if a PEX-A tub spout connection will work reliably without a shower diverter, and if a shower-only valve can be used as a tub-only valve.

No single source clearly answers compatibility questions for these specific DIY combinations (shower-only valve used as tub-only with PEX-A stub-out).

Opp. Score

Severity

2Mild

Willingness to Pay

implied

Added

May 25, 2026

Implied Software Gaps

No existing tool verifies compatibility of specific valve models with PEX-A tub spout configurations for no-shower setups.

App Concept

PlumbCheck DIY

A web app that lets DIYers input their exact part numbers (valve, fittings, pipe type) and get a compatibility report with code-checked installation guidance, including water flow calculations for tub spouts without diverters.

Key Features

Part-number-based compatibility checker
Flow rate estimator for PEX vs copper spout connections
Step-by-step installation guides with tool lists
Forum to ask verified plumbers specific questions

Target Users: DIY homeowners doing their own plumbing repairs or renovations, especially those mixing different pipe materials like PEX, copper, and SharkBite.

Revenue Model: Freemium with $4.99 per compatibility report or $9.99/mo subscription for unlimited checks and personalized support.

Existing Solutions Mentioned

Pex-A connectionsSharkBite stub-outDelta R10000 shower-only valveSoldering

Part of App Idea

GapBridge Seal Kit

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