HOT- AND COLD-WATER PLUMBING DISTRIBUTION
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Hot- and cold-water plumbing distribution within residential and commercial applications has been one of the primary applications for the plastic piping materials represented by PPI's Building & Construction Division since its founding. Plumbing distribution systems transport potable water, also known as drinking water, throughout buildings to end-points such as fixtures, faucets, showerheads, toilets, laundry, dishwashers, hose bibs, and more.
Plastic piping materials have been approved for hot- and cold-water plumbing distribution for decades, and provide economical, safe, sustainable, and reliable plumbing systems without the cost, corrosion, or environmental issues associated with metal piping such as copper.
The plastic plumbing materials represented by PPI are approved in model plumbing codes across USA and Canada.
Many of the plastic piping materials represented by PPI's Building & Construction Division are intended and certified for hot- and cold-water plumbing distribution. This includes certain CPVC, PEX, PE-RT and PP pipe and tubing materials, as well as PEX-AL-PEX composite materials and the various fittings which are designed for use with each of these piping materials.
These materials must meet specific performance requirements and must carry third party certifications demonstrating they are safe for use in these applications. All products for hot- and cold-water distribution will carry markings indicating they are safe for the intended use.
Please read more about each of these piping materials, including the specific product standards to which they are produced, on the webpages for each of the materials.
Hot- and cold-water plumbing distribution within residential and commercial applications is one of the primary applications for the plastic piping materials represented by PPI's Building & Construction Division.
Flexible piping materials PEX and PE-RT are commonly installed using one of three main piping configurations as described in various publications:
- Trunk and branch (a.k.a. traditional)
- Parallel (a.k.a. home-run)
- Zoned (a.k.a. remote manifolds)
The publication DESIGN GUIDE for Residential PEX Water Supply Plumbing Systems explains that by applying proper design techniques, PEX plumbing systems can deliver the optimum combination of performance, efficiency, cost and longevity. The other plastic materials can provide similar benefits.
PPI has also published the ASPE-accredited and ICC-accredited course Design of PEX Plumbing Systems to Optimize Performance and Efficiency. This course teaches how to achieve these benefits.
Thoughtful design of the hot-water plumbing systems using recirculation loops close to the plumbing outlets (i.e. fixtures) can reduce the wait time for hot water and the associated waste of water. Both the DESIGN GUIDE and the above-mentioned course explain how to achieve this.
Plastic pipes don't corrode or suffer scale build-up which can reduce flows. Flexible plastic pipes such as PEX and PE-RT allow for bends and sweeps to be formed by hand, reducing installation time and pressure loss in the piping. And since these plastic materials are inherent insulators, thermal heat transfer through pipe walls is reduced. In addition:
- Plastic plumbing pipes can reduce installation costs while improving long-term performance and reliability
- An optimized intelligent plumbing design can save both water and energy
- Plastic plumbing pipes are quieter and transfer less heat than copper pipes
- The properties of plastic plumbing systems can improve the health, safety and welfare of building occupants through efficient and reliable delivery of clean water
PEX Design Guide - 2nd Edition
Designing PEX Plumbing Systems to Optimoze Performance & Efficiency
Achieving Zero Energy Ready with Plastic Piping Solutions
Building & Construction Related Literature