The contractor wants to use a 1.5"CPVC pipe from where the domestic water (Copper pipe) splits off and through the riser that includes the check valve, flow switch and pressure gauge.
Request the complete listing and install for the brand of pipe to be used.
As part of the listing it will say where it can be used exposed.
Yes in some cases it can be used as the riser exposed.
Now if talking underground use, I would say no.
What brand of pipe?
Yes, 13D system. Thanks for your help.
Should not be a problem
Get the brand
Get the MOST current install with listing where it can be used exposed
Check bottom of page 12 for this brand
Plastic pipe is permitted for certain types of sprinkler systems. The plastic pipe is required to be listed by a testing agency. NFPA 13 identifies CPVC (chlorinated polyvinyl chloride) and PB (polybutylene) as acceptable plastic piping materials.
CPVC is a limited combustible piping material; therefore, it must be installed to prevent the pipe from failing during a fire.
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