Available on PPI’s website, PPI Recommendation H Direct Connection of Plastic Piping Materials to Tankless Water Heaters for Domestic (i.e. residential) Applications provides clear guidance on the question of direct connection of piping materials to tankless water heaters.
"Hard Knocks, My Life Inside Boiler Rooms" takes an in-depth look at what it takes to be a top-notch, heavyweight hydronic system service technician, installer, and designer from a professional who spent nearly 40 years in the trenches.
The handbook includes the PPI Design Guide that will provide a step-by-step path for design engineers based upon the complex LRFD Bridge Design process established by AASHTO for corrugated plastic pipe.
"MAB-3 Model Specifications Guide for PE 4710 Buried Potable Water Service, Distribution and Transmission Pipes and Fittings" covers system design parameters, quality control, pressure classes and more.