The most commonly used steel pipe for sprinkler systems is black steel pipe. Copper tubing is another piping material listed for sprinklers in NFPA 13. Also, plastic pipe (namely, CPVC and PEX tubing) is permitted for certain types of sprinkler systems.
Anvil International recently launched a 3D CAD library at its website featuring Gruvlok® Grooved Couplings, Grooved and Plain-end Fittings, Flanges, and Valves.
When deciding which fittings to use for PEX piping there are a wide variety of products and tools available, as well as a variety of variables to consider, including costs, safety and ease of installation. If you don't do the research you could end up with major headaches, like getting sued due to groundwater contamination or a leaky system.
The intent in designing and installing sanitary drainage systems is to ensure they will function reliably, are neither undersized nor oversized, and are constructed from materials, fittings and connections whose quality is regulated by codes and standards.
