What Is a Manifold?
A manifold is a plumbing distribution fitting that sends water from one supply line to several branch lines. Each branch serves a fixture or area, such as a bathroom, kitchen, or laundry room. Shutoff points on the manifold can isolate one branch while the rest of the home keeps receiving water.
Quick Facts About Manifold
Category
Water distribution fitting
Used for
Whole house water supply
Common confusion
Not a pressure regulator
Also called
Plumbing Manifold, Water distribution manifold
Often discussed with
Whole House Repiping
Key Takeaways About Manifold
- A manifold groups several branch connections in one accessible location.
- Individual shutoffs can isolate one fixture line for service.
- A manifold is not the same as a pressure regulator.
How Manifold Works
Manifold systems receive water through one inlet and send it through separate outlets. Each outlet connects to a branch line that serves a fixture or area. The manifold keeps these connections together in an accessible place.
Related glossary terms: Supply Line, Main Shutoff Valve, Pressure Reducing Valve.
Individual valves control the branch outlets. Closing one valve stops water to that line while other outlets remain open. This setup can make service easier because a plumber can work on one fixture without shutting off the whole home.
During whole house repiping, the branch lines may run from the manifold to sinks, toilets, showers, and appliances. PEX tubing often connects these lines because it bends around framing and needs fewer joints. The manifold does not create water pressure. A pressure reducing valve serves that separate function.
Expert Note
When we plan whole house repiping, we place the manifold where its valves remain reachable. We label each branch so you can identify the fixture it serves. Our team also checks the connections and valves for proper operation before the system is closed behind walls.
Manifold in Practice: A Real-World Example
During a whole house repiping project, a manifold may sit near the main water entry point. Separate lines can then run to the kitchen sink, upstairs bathroom, and water heater, with a valve controlling each branch.
Related Services
Related Terms
Supply Line
A supply line is a flexible or rigid tube that carries clean water from a shutoff…
Main Shutoff Valve
A main shutoff valve is the control that stops water from entering a building through the…
Pressure Reducing Valve
A Pressure Reducing Valve is a plumbing control that lowers high incoming water pressure to a…
Pressure Balancing Valve
A Pressure Balancing Valve is a shower control that keeps water temperature steadier when hot or…
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