PEX Home Run (Manifold) System

A Home Run System utilizes two centrally located manifolds, one for hot and one for cold service. Typically, these will be located at the water source for each, the water meter for cold and the water heater for hot. From these locations tubing is run to each individual fixture. Depending upon the number of fixtures, the manifolds will have the corresponding number of ports.

The benefits of using a Home Run System with a dedicated line to each fixture is the maintaining of a near constant water pressure, flow and temperature to all fixtures. Additionally, hot water is supplied to fixtures much faster, saving both water and energy. A home run system will utilize the fewest number of fittings while requiring the most tubing of all Pex Piping methods.

Zone Manifold System

The Zone Manifold System is a combination of both the Home Run and the traditional Trunk and Branch piping methods, providing reduced installation time, less tubing, and isolation of runs. Hot and cold trunk lines are run and are then either branched to remotely located manifolds or include remote manifolds within the run. Manifolds should be placed in the vicinity of a service location, i.e. kitchen, bathroom, laundry.

From the remote manifold location, tubing is run to each individual fixture. The benefits of using a Zone Manifold System are similar to a Home Run System, with near constant water pressure, flow and temperature to fixtures, and faster hot water delivery. It also provides the benefit of Trunk & Branch System by reducing the amount of tubing required.

a manifold location should be chosen that:

•Is accessible for future access.

•Provides convenient access to all fixtures.

•Permits easy connections to the supply mains.

•Provides adequate protection from freezing.

This diagram is to be used as an example of a zone manifold system.

Some elements have been eliminated for clarity.

Always follow correct piping practices, engineering principles,

and all applicable Local Codes during installation.