Pipehound
Plumbing code answers on site
Only for iPhone
$9.99 · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
PipeHound is your plumbing-code field dog — ask code questions in plain English and get fast answers with code-section citations for your state.
BUILT FOR PLUMBERS ON THE JOB
• Ask in plain English — no more flipping through the code book
• Hands-free voice input with a big, glove-friendly mic button
• Answers cite the code sections so you can verify fast
• State-aware: pick your state and PipeHound answers from the right code
• Chat history stays on your device — no accounts, no tracking
CODES COVERED AT LAUNCH
• Colorado — 2021 International Plumbing Code with state amendments
• California — 2025 California Plumbing Code (2024 UPC base)
More states are on the way.
Whether you're roughing in a DWV stack, sizing water lines, or checking trap-arm limits, PipeHound points you at the right section in seconds.
PipeHound is a reference aid — always verify against the code as adopted in your jurisdiction and confirm with your AHJ before performing work.
Your first 4 questions are free — no account, no signup. Unlimited questions with PipeHound Pro, a $4.99/month auto-renewing subscription. Answers are generated by our self-hosted model — see the in-app privacy disclosure for what's sent.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://pipehound-privacy.vercel.app/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
PipeHound Pro is here: your first 4 questions are free, then unlock unlimited plumbing-code answers with a Pro subscription.
• Keyboard now dismisses properly after sending a question
• VoiceOver improvements
• Bug fixes and polish
The developer, Nathanial Smalley, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- User Content
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Nathanial Smalley
- Size
- 10.4 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- PipeHound Pro $4.99
- Copyright
- © 2026 Change Optics AI LLC