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PPI MS-7 includes detailed specifications for four plastic piping materials which have been proven in ground-source heat exchange systems: HDPE, PE-RT, PEX, and PP (PP-R and PP-RCT).
CPVC has been used for residential plumbing in the U.S. for more than 60 years and is unique among today’s plumbing materials. CPVC was specifically designed to be compatible with American drinking water and is impervious to chlorine. As a result, virtually all CPVC failures can be traced back to improper installation or servicing practices.
Uponor PP-RCT is a polypropylene pipe that is a lightweight, durable product that resists corrosion, rust and scale buildup, making it ideal for mechanical HVAC piping applications, such as hydronic heating, hot water and chilled water, the company points out.
The new COOL-FIT PE Plus pre-insulated polyethylene piping system includes a complete range of pre-insulated pipes, fittings and valves that efficiently convey brine, glycol, ethanol and chilled water in temperatures from minus 58° F to 140° F.
A multiple boiler system using sectional cast-iron boilers has been configured to supply two loads as shown below. A “crossover pipe” is installed in case the flow rate in the primary circuit is different from the flow through the boilers. There are several piping errors in this proposed design. Can you spot at least five of them?