An expert overview of home plumbing systems, including water supply, drain-waste-vent, and more.



A home’s plumbing systems are a broad network of water and gas supply pipes, drain-waste-vent plumbing, and more.© Don Vandervort, HomeTips

Understanding the fundamentals of a plumbing system allows you to better understand the types of problems that occur or, if you’re planning a remodel or new home, it helps you design a system that will work properly and pass plumbing codes.


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Water System Meter & Valve©Don Vandervort,Hometips


有关热水器的信息,请参阅How Home Water Supply Works

供水系统Don Vandervort,Hometips©1997到2022年| HomeTips

Drain-Waste-Vent System

Though it isn’t one of the most glamorous parts of a house, the排水废气(DWV) systemis one of the most crucial. The job of the drain-waste part of the system is to carry waste water and sewage from sinks, bathtubs, showers, toilets, and water-using appliances such as dishwashers and washing machines and deliver those wastes to the septic tank or public sewer.

Drawing of a house’s drain-waste-vent system including blue-colored vent pipes.
典型的通风口和家庭管道中的排水管Don Vandervort,Hometips©1997到2022年| HomeTips

The vent system—part of the plumbing that is usually less well known to most homeowners—is connected to the drain-waste piping, and its job is to ventilate sewage gases so they don’t build up in the house. The vent system also helps drainpipes maintain the right pressure for proper drainage.


Kitchen Plumbing System

If you’re reading this section, the chances are pretty good that either 1) you’re having problems with the pipes or drains in your kitchen or 2) you’re considering (or are in the midst of) a kitchen remodeling project that involves dealing with the pipes in the floor and walls. You’ll find help with both of these kinds of issues here, where we look at planning, installing, and caring for plumbing with a focus on the kitchen.

Illustration of a kitchen sink plumbing system including water supply, drains, tubes, and shut-off valves.
Kitchen Sink Plumbing Diagram©Don Vandervort,Hometips


Read more about厨房管道系统


Bathroom Plumbing System

Sinks, showers, bathtubs, and toilets—bathrooms are all about plumbing. The plumbing in a bathroom must handle water delivery to and waste removal from all of these fixtures in an organized, efficient, leak-free manner.

More Bathroom Plumbing Topics:
Bathroom Plumbing
How to Connect a Bathroom Sink Drain


Bathroom Sink Plumbing Diagram© Don Vandervort, HomeTips

Water supply plumbing delivers hot and cold water to the sinks, tub, toilet, and shower. This system originates at the municipal supply or other fresh water source, goes through the meter, and is delivered to the house. At the water heater, it splits into two lines—one that carries cold water and the other that delivers hot water from the water heater to the fixtures that require it.

The drain-waste-vent system collects waste water from fixtures and waste from toilets and delivers them to the sewer or septic system. Near each of the sinks, tubs, showers, and toilets, vent pipes exhaust sewer gases up and out the roof and provide air pressure so wastes can flow freely.


Also read:可能会摧毁你家的管道的错误


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关于Don Vandervort.
Don Vandervort has developed his expertise for more than 30 years, as Building Editor for Sunset Books, Senior Editor at Home Magazine, author of more than 30 home improvement books, and writer of countless magazine articles. He appeared for 3 seasons on HGTV’s “The Fix,” and served as MSN’s home expert for several years. Don founded HomeTips in 1996.阅读更多关于Don Vandervort的信息