InterNACHI message board Plumbing forum
- Date of manufacture codes
- Inspecting Residential Water Heaters
- Water Heater Backdrafting (website, excellent information)
- Residential PEX Water Supply Plumbing Systems
- Problems with- and Identification of- Kitec Water Supply Pipes
- Type B Gas Vent Installation Details (Underwriter’s Laboratory)
- Sewage Ejector Installation and Operation Manual
- Sump Pump Installation Manual (SSPMA)
- Bonding Gas Pipes Google Results
- Plumbing.com (Website)
- Copper and Concrete (Plumbing.com article)
- Polybutylene Water Pipes