Stand-alone vs Multipurpose Systems

There are two options when designing a plumbing system and fire sprinkler system for one-and two-family homes (NFPA 13D Applications): Stand-alone and Multipurpose. Each option offers its own distinct advantages which should be considered before choosing the one that best fits a specific application. The systems can be designed as separate systems (stand-alone) or combined in a single, multipurpose system. In a stand-alone system, the fire sprinkler system is installed as a separate system from the plumbing system.  A multipurpose system, as defined by NFPA 13D, is intended to service both domestic cold water and fire protection needs. Network, integrated, or looped systems are different types of multipurpose systems.

Stand-alone
There are many reasons for choosing a stand-alone fire sprinkler system. Most notably from a life safety perspective, a stand-alone design ensures the integrity of each individual system by allowing the plumbing system to be shut off independently from the fire sprinkler system. That means there is no adverse effect on the water pressure of a fire sprinkler system while making repairs or modifications to the plumbing system. Stand-alone systems are universally approved in all U.S. jurisdictions. This removes the guesswork regarding code approval. Also, stand-alone systems are the only option when installing fire sprinklers for multi-family residences (NFPA 13R Applications). CPVC, iron or copper can be used in stand-alone systems, however, PEX is not approved for the stand-alone design.

BlazeMaster® fire sprinkler systems as featured on "Designing Spaces" television show

Multipurpose
Multipurpose systems, which can be created by combining BlazeMaster® fire sprinkler pipe and fittings with either a FlowGuard Gold® CPVC plumbing system or any other pipe approved for use by the plumbing authority are attractive for other reasons. Since they can be installed completely by a plumber or in combination with a fire sprinkler contractor, they offer flexibility with the trades you choose to work with as jurisdictions may have different licensing requirements and expectations for installers. As a combination system, it will also likely require less pipe, but more fittings. This may translate into environmental benefits.

In addition, a multipurpose system is the only design that provides the flexibility to use either CPVC or PEX fire sprinkler pipe. or both together It is important, however, to check local code requirements before installation, as multipurpose piping systems are not approved in all jurisdictions.

Only CPVC can be installed as either a stand-alone or multipurpose system and only CPVC can be installed entirely by the plumber or in combination with the plumber and the fire sprinkler contractor. This makes a BlazeMaster / FlowGuard Gold piping combination the best choice for a builder as these products meet requirements for every jurisdiction.