Plumbing manifolds factor prominently into many plumbing jobs. Virtually every modern residential plumbing system requires at least one manifold, and larger systems may need to rely on several traditional manifolds. For small and medium-sized systems, one PEX manifold may suffice for standard fixtures. Multi-unit residential structures typically rely on networks that consist of a single “main” manifold and multiple “mini-manifolds” at unit-specific junctions.
In single-family structures, plumbers typically locate plumbing manifolds at the closest possible point to the home’s incoming service line. This may be in a basement or ground-level utility closet. To allow physical access for manual shutoff operations, manifolds must be separated from other equipment. Although they must have at least 18 inches of horizontal clearance and 36 inches of vertical clearance from the system’s water heater, they are rarely much farther from this important node. For convenience, certain types of plumbing manifolds can be mounted between wall studs.
