We use cookies to provide you with a better experience. By continuing to browse the site you are agreeing to our use of cookies in accordance with our Cookie Policy.

logo
  • Engineers & Specifiers
  • Contractors & Installers
  • Wholesalers & Distributors
  • Sign In
  • Create Account
  • Sign Out
  • My Account
Free Subscription
  • Sign In
  • Create Account
  • Sign Out
  • My Account
  • PRODUCTS
    • Bath & Kitchen
    • Fire Protection
    • HVAC
    • Hydronics/Radiant
    • Plumbing
    • PVF
    • Tools
  • PROJECTS
    • Commercial
    • Green Building
    • MRO/Retrofit
    • Remodeling
    • Residential
  • HOW TO
    • Design
    • Fire Protection
    • Legal Matters
    • Management
  • BUSINESS
    • Buying Groups
    • Technology
    • Associations
  • CODES & STANDARDS
    • ANSI
    • ASHRAE
    • ASSE
    • Regulations
    • Green Building
    • IAPMO
    • ICC
    • NFPA
  • RESOURCES
    • Media Kit
    • Advertise
    • Contact Us
    • Classifieds
    • Digital Editions
    • Behind the Wall
    • Webinars
    • AHR Live 2023
  • PODCASTS
  • DIGITAL EDITIONS
Home » New PPI Document Answers Tankless Water Heater Question

New PPI Document Answers Tankless Water Heater Question

November 19, 2020
No Comments
New PPI Document Answers Tankless Water Heater Question

The Plastics Pipe Institute (PPI), has published a new recommendation related to the direct connection of plastic piping materials CPVC, PE-RT, PEX, and PP to tankless water heaters.

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 these piping materials to tankless water heaters. PPI is the major trade association representing the plastic pipe industry.

“PPI Recommendation H answers questions which plumbers and builders have been asking about whether it is appropriate for plastic pressure pipe materials to connect directly to the cold-water inlet and hot-water outlet of domestic tankless water heaters, without the use of metallic flex connectors. Based on our research, these direct connections are usually acceptable,” explained Lance MacNevin, P. Eng., director of engineering for PPI's Building & Construction Division.   

“To help answer this question, PPI and our members researched Canadian and US model plumbing codes,” he continued, “reviewed the published literature on dozens of tankless water heaters, and confirmed the recommendations of plastic piping system manufacturers. Based on the proven high-temperature capabilities of these piping materials and the relatively consistent water temperature control of modern tankless water heaters, there is no technical reason to prohibit direct connections. Of course, installers must follow local code requirements and the manufacturer installation instructions.

“As stated in Recommendation H: Piping systems using the materials CPVC, PE-RT, PEX, and PP, which carry a pressure rating of 100 psi at 180 degrees Fahrenheit (690 kPa at  82 degrees Celsius), and which are intended and certified for hot and cold potable water distribution systems according to industry standards and relevant codes, may be connected directly to tankless water heaters which are intended for domestic (i.e. residential) applications, unless prohibited by local plumbing code or the specific water heater manufacturer.” 

According to PPI President David Fink, “The research on this topic was prompted by an inquiry from a major builders group. The rapid development of Recommendation H demonstrates the ability of PPI members to collaborate and respond quickly to industry questions about responsible usage of plastic piping materials.”

Published on PPI’s website directly at bit.ly/2UGMPqr, Recommendation H is one of several PPI documents related to the design and installation of pressure pipe materials for plumbing and mechanical applications, which are all published as a service to the industry. 

Associations Contractors & Installers Design Engineers & Specifiers How To Industry Community News Plumbing PVF Wholesalers & Distributors
  • Related Articles

    PPI Technical Document Answers Questions About Insulating Plastic Pressure Piping Systems

    PPI Announces New Technical Document for HDPE Pipe Use in Seismic Sensitive Areas

    PPI Publishes New Technical Document for Installing Pipe Near Recessed Lighting

You must login or register in order to post a comment.

Report Abusive Comment

Most Popular

  • Chicago Plumber’s Union Dyes Chicago River Green for St. Patrick’s Day 2023

  • Everything You Wanted to Know About Orangeburg Pipe (But Were Afraid To Ask)

  • Vote Now! Plumbing Design of the Year: A Readers’ Choice Award

  • The Basis for Most Plumbing Codes

Featured Video

Caleffi video thumb

The Gold Standard: Separation with NO Compromise

Industry Events

  • 26Mar

    MCAA 2023 Annual Convention

    Phoenix, AZ
  • 29Mar

    2023 SFPE European Conference & Expo

    Berlin ,
  • 11Apr

    ASA ELEVATE2023

    Charleston, SC
More Events

Subscribe to our newsletters & stay updated

Subscribe & Learn More

  • Tw03 2023 cover
    Learn More
  • Pe03 2023 cover
    Learn More
  • Phc03 2023 cover
    Learn More
  • Es 2022
    Learn More
Subscribe

More from PHCP Pros

  • Editorial Team
  • Home
  • Contact Us
  • About
  • Advertise

Follow Us

© 2023 All Rights Reserved

Design, CMS, Hosting & Web Development | ePublishing