Design & Installation

Hydronic Radiant Heating Applications

DOs for all hydronic radiant
heating applications

DON’Ts for all hydronic radiant heating applications

• Only install in accordance with pipe, fittings and solvent cement manufacturer’s recommendations and installation instructions.
• Follow recommended safe work practices.
• The system operating temperature/pressure should not exceed the temperature/pressure rating of the piping system.
• Verify that the maximum outlet temperature and pressure of the boiler is less than the temperature and pressure rating of the pipe (see charts below).
• Always use the proper derating factors with FlowGuard Gold and Corzan pipe to find the pressure ratings at the applicable operating temperature.
• Always follow local codes and approvals when installing plumbing and heating equipment.
• Ensure that the system design allows for thermal expansion and contraction as recommended in the FlowGuard Gold and Corzan design guide.
• Use only CPVC-x-metal transition adapters if using threaded connections.
• Pay close attention to proper use of good solvent cementing practices, including beveling and proper dauber sizing.
• Additional support should be added to the metal side of a CPVC-x-metal transition or other metallic components to support the weight of the metal system.
• Use check valves, heat traps or back flow prevention to prevent cross-connections between hot and cold water lines.
• Flush the interior of heat exchangers or the exterior of condenser coils thoroughly with mild ionic detergent solution to remove incompatible oils prior to piping installation.
• Use a rinse with clean water to purge the system as a final flushing. 
• Verify that all boiler cleaning and sealing chemicals used in the hydronic radiant heating system are compatible with CPVC.

• Do not use 100 percent CPVC threaded adapters, male or female.
• Do not use the CPVC piping system to support any metallic components.
• Do not use compression fittings for hydronic radiant heating applications that will operate above 140° F.
• Do not use solvent cement that exceeds its shelf life or has become discolored or gelled.
• Do not use CPVC tees or other CPVC components as mixing devices.
• Do not over solvent-cement the joints. Puddling of solvent cement must be avoided.
• Do not rely on an expansion tank to handle thermal expansion of the piping system. Expansion tanks accommodate expansion of the fluid, not longitudinal expansion of the pipe. The piping system must be designed to allow for thermal expansion. 

  FlowGuard Gold Pressure Rating Chart (psi)

  Corzan Schedule 80 Pressure Rating Chart (psi)