Under your sink, hidden from view, is a curve-shaped section of pipe called a P-trap that is vital to the inner workings of your plumbing system. For homeowners who live in Reno and Las Vegas, where hard water can wreak havoc on their pipes, it’s important to learn about this plumbing essential. Understanding how this little piece of pipe works, and when it’s not working properly, can help you avoid costly clogged drains, dangerous sewer gas leaks, and bad odors.
What Is a P-Trap?
A P-trap is a section of drainpipe that is U-shaped and stops sewer gases from entering your home. The bend acts as a water barrier and can also stop small particles, such as hair, grease, and food, from entering the main plumbing line.
P-traps are usually found under:
- Kitchen sinks
- Bathroom sinks
- Bathtubs and showers
- Laundry tubs
- Utility sinks
Why This Pipe Matters
In hot, arid climates like Reno and Las Vegas, plumbing systems can dry out fast, especially when not in use. Add to this the hard water often found in both Clark County and Washoe County, and you have an environment where plumbing systems can fail. But with proper monitoring, you can ensure your P-traps function properly.
According to Nevada building codes, P-traps are required for every pipe that drains wastewater. This section of plumbing acts as a barrier to stop insects and rodents from crawling up the plumbing lines and must be properly installed and vented to stop toxic gases from entering your home. For plumbers, this pipe acts as an easy access point to clear clogged drains.
S-Trap vs P-Trap
Plumbing traps come in two shapes: S-traps and P-traps. Both are designed to prevent sewer gases from entering your home, and each has its advantages and disadvantages. In Nevada homes, the P-trap is the preferred option because it helps maintain a water seal in hot climates.
S-traps are:
- Shaped like the letter “S”
- Less reliable than P-traps and can siphon dry, which will allow sewer gas to enter your home.
- Often found in homes built before 1980, and are no longer code-compliant.
P-traps are:
- Shaped like the letter “P”
- The standard type of trap in modern plumbing. They are more reliable than S-traps because they are less prone to siphoning.
Common P-Trap Issues
If you’re experiencing any of the following problems, it’s time to schedule an appointment with one of our trained plumbing technicians:
- Clogged Drain: Small particles can easily get trapped in the U-shaped bend of this pipe, causing a clog in the drain.
- Odors: If you smell rotten eggs when standing at a sink, it can be a sign of sewage seeping up the line. This can happen with a dried-out trap or loose connection.
- Dry Trap: The desert climate of Reno and Las Vegas can cause the P-trap to dry out from evaporation, especially if the sink is not used frequently. With no water barrier, odors and insects can sneak into your home.
- Water Leaks: If your home is older, pipes can loosen or crack over time, causing leaks and other issues.
Get Local Plumbing Help Fast
At Hawthorne Plumbing, Heating and Cooling, we specialize in residential and commercial plumbing services throughout Reno, Sparks, Las Vegas, Henderson, and surrounding areas. Our licensed plumbers understand the challenges of living in hotter climates and how extreme temperatures can affect your plumbing system.
If you’re experiencing clogged or slow drains, water leaks under your sink, or a persistent odor, don’t wait. These types of issues can be fixed quickly by our team, and come with a 100% satisfaction guarantee and a two-year warranty on approved repairs.
P-Trap FAQs
This task is best left to the professionals since it involves disassembling and reassembling the plumbing system beneath a sink. If done improperly, this process can introduce other issues, such as leaks or a dry P-trap.
Since small particles can easily get stuck inside, it’s best to have it cleaned every 6–12 months. If you’re experiencing slow or clogged drains, it’s probably time to have it cleaned out by a plumber.
We don’t recommend using any type of chemical drain cleaner in your system since the harsh chemicals can damage your pipes.
