Major Differences Between Commercial and Residential Plumbing

Plumbing problems can arise at any time, anywhere. When a new home, building, or high rise is built, the design usually revolves around where the plumbing will be installed.

We tend not to think about what we can’t see so it can be hard to notice the difference between commercial and residential plumbing behind your walls and under floors.

Running water is necessary for both your home and the office, but what is the difference between commercial plumbing and residential plumbing?

Keep reading to learn more!

Commercial Plumbing vs Residential: The Differences

Plumbing is plumbing when it comes down to it. The plumbing in a home or a commercial building usually uses the same materials and they both fulfill the same basic function.

Here at 1-Tom-Plumber, our technicians specialize in both commercial and residential plumbing. It does take some experience and skill to tackle a large commercial plumbing project.

Commercial plumbing is no easy feat. Installations are usually optimized from the project design phase since plumbing fixtures and piping are embedded in walls and floors.

The three main differences a technician must consider when servicing a commercial building are a distinction in size, number of floors, and a more complex plumbing system. 

1. Size

Commercial buildings are generally just bigger, to state the obvious.

From office buildings and apartment complexes to retail buildings and high rises, all of these structures need a plumbing system. Because they are typically occupied by more people, they need more pipes and outlets for sinks and toilets.

This also means increased demand by employees and customers which could result in more routine maintenance and emergencies. Commercial buildings also require larger pipes to provide more water since they are occupied by more people than say a four-family home.

2. Floors

Multiple floors require plumbing on each level of the structure.

In commercial buildings, all branch lines (smaller water lines) stem from one large mainline. All branch lines may have to reach as high as 12 to 39 floors which also brings gravity into play. Water pressure has to be strong enough to keep the whole system working efficiently.

The pipes used may differ from those used in residential, as well. Larger industrial pipes provide more water to more people.

Commercial construction prohibits PVC by most plumbing codes in all large above-ground drains due to its poor exposure to high temperatures.

Their durability and resistance to corrosion, PEX, copper, and stainless steel means that you can find PVC pipe is most commercial plumbing. This drastically incenses material costs and reduces the longevity of a commercial drainage system.

3. Maintenance and Repairs

Most office buildings, malls, high rises, etc. operate around normal business hours.

This means that repairs and service calls usually take place at specific times of the day or night. Typically, multiple people manage commercial buildings. This means the owner of the building is not present during repairs.

Consequently, plumbers must communicate via other methods or with on-site property managers. It is mandatory that larger insurance policies and specific building policies are considered with commercial plumbing.

Plumbing Maintenance in High Rises

High-rise design and construction present more than a few special challenges, especially regarding the design of plumbing systems.

For plumbing purposes, the term “multi-story” or “high-rise” applies to buildings that are too tall to supply throughout by the normal pressure in the public water mains. These buildings have particular needs in the design of their sanitary drainage and venting systems.

Some of the biggest challenges to high-rise plumbing design relate to controlling pressure, proper venting, and drainage.  

1. Water Pressure

In any commercial or residential plumbing system, pressure is both a friend and a foe.

Strong water pressure is needed to push water up multiple floors, but it can also cause pressure at the bottom, exceeding the allowable safe level as limited by code and materials. This issue is solved through pressure-reducing valves or creating a pressure zone by branching from the higher pressure riser.

The complexity of a high-rise building’s water pressure requires a skilled commercial plumber to sort through a variety of issues that may be experienced. In a normal home, if one toilet isn’t working correctly, you can just use the other one in your house. But with commercial plumbing, an out-of-order bathroom can affect many people in a building.

2. Venting

Many people don’t realize that you need air in your plumbing system to keep things running smoothly. Air is critical to the drainage process because drainage flow is caused by sloping pipes, and the motive force is gravity.

Without proper airflow, you may experience slow drain performance or a gulping sound in your fixture. Proper ventilation can be especially tricky when it comes to 20+ story buildings.

When dealing with high-rises, both a drainage stack and vent stack should be present. This allows for pressure equalization and relief throughout the system.

Aside from relieving pressure in the drainage system, the vent system allows air to circulate in both directions in response to the fluctuating flow in the drainage system. In many high riser vent designs, where stacks need to offset horizontally on a given floor, a relief vent is required.

Proper venting also ensures no hazardous gas enters the structure and allows the sewer to drain without limited pressure.

3. Drainage

Drainage and venting issues in high-rise structures are essentially general plumbing problems on a bigger scale.

Negative pressure can emerge in drainage systems as a result of defective venting systems. This is usually the result of blocked or damaged vent stacks.

Every fixture, whether residential or commercial plumbing, must be connected to its own drain line. These drain lines then intersect with the mainline. Water must travel this series of lines before being removed from the high-rise.

Clogged drains prevent wastewater from freely flowing through lines to the outside where it’s expelled into the septic tank and sewer system.

Many people won’t question the difference between residential and commercial plumbing. It is important to know your preferred plumber is trained in both fields. This ensures he/she can take on any problem that you might run into in your home, office, rental property, or even a high-rise building.

Plumbing is an essential part of our everyday life. Safe, running water keeps us healthy, hydrated, clean, and free of disease. Commercial plumbing is as important as the plumbing in your home. The next time you visit a commercial building, consider the care that went into designing and maintaining its vast systems.

Call 1-Tom-Plumber

Don’t hesitate to contact us here or call us at 1-Tom-Plumber (1-866-758-6237) if you want to know more about commercial vs residential plumbing. We can help in either case.

1-Tom-Plumber’s certified team of plumbers and drain technicians respond immediately to any emergency plumbing, drain cleaning, or water damage problem. We also handle the excavation of underground water lines and sewer main lines. Our immediate-response team is available every day and night of the year, even on holidays.