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How to Clean the Inside of a PVC Pipe

Written by: Mark Ligon

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Published on

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Time to read 5 min

If you have a clogged PVC pipe or want to prevent your pipes from clogging, it may be time to clean the inside of your pipes. Fortunately, with a plunger or snake and some dish soap or enzyme / bacterial drain cleaner, you can easily clean most PVC type piping on your own.

Why Clean the Inside of Your Piping?

People often clean and remove lettering on the outside of PVC, particularly if the pipe will be visible, but there are plenty of reasons to consider cleaning the inside of your PVC pipes. One of the most common reasons to clean the inside of PVC is to clear a clog. If you notice water backing up in your sinks, showers, toilets, and even washing machines, it’s likely caused by a clog.


Of course, starting your day with a shower full of water is never enjoyable. That’s why it’s often a good idea to clean your pipes regularly to prevent clogs from forming. The pipes leading from your kitchen sink, for example, could contain a buildup of grease over time. HVAC drain lines can commonly become clogged, as well. It’s much easier—and less stressful—to clean these pipes frequently than to clear a clog that is causing water to back up.

Cleaning Techniques

Plunger or Snake

If you have a clog or potential clog, it’s best to have both of these tools on hand. While people usually associate a plunger with toilets, it’s also incredibly effective at clearing clogs in sinks, as well as shower and bathtub drains. A snake can be helpful to dislodge clogs that occur further down the line. You can use these tools on their own or combine them with one of the other cleaning methods below for even more drain cleaning effectiveness.

Dish Soap Method

For simple clogs or regular cleanings, warm water and dish soap often does the trick. To use this method, heat a few gallons of water in a pot, then let it cool for about two minutes. Mix in a few drops of dish soap, then pour it down the drain.

Enzyme / Bacterial Drain Cleaner Method

There are many types of drain cleaners on the market. While chemical-based cleaners can be effective, they may also cause damage if not used properly. Enzyme / bacterial cleaners are safe to use and work well to clear organic material like grease and hair from drains. Be sure to follow the instructions on the bottle, and consider using a snake as well, to aid in removing the clog.

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Potential Differences in Cleaning PVC vs Other Materials

PVC is designed to be very durable and resistant to rust and corrosion. It’s also nonporous, which allows for debris to be washed away easily, often without the need to remove or open up the pipes. Clogs in metal or copper pipes may be cleared in the same way, but sometimes, they need to be taken apart and scrubbed due to rust and corrosion that can be present.

Additional Tips

Pay Attention to the Cleaner’s Ingredients

While PVC is extremely durable, there are cleaners on the market that can cause damage. Ensure you read the labels clearly, including how to use or apply the cleaner. Also, don’t mix chemical cleaners. Typical use and makeup labels don’t include discussing outcomes from mixing multiple chemical types together. You could end up with a dangerous chemical reaction, damaging pipes, as well as your health.

Clean Your Pipes Regularly

While most piping systems are a last thought, it’s smart to consider regular maintenance to keep them flowing. If you notice slow flowing water, it may be an early sign of something building up. Stay on top of your systems with a regular schedule.

Pipe Disassembly May Not Be Needed

For regular cleaning and simple clogs, there’s typically no need to disassemble your pipes. If the clog is further down the drain, you can try using a plunger or a snake, in addition to a drain cleaner.

Know When to Call a Plumber

If you’ve tried to clear a blockage on your own and haven’t had luck, it may be time to consider calling a plumber. If not, you could potentially damage your piping and could even cause damage to surrounding fixtures. A plumber will likely be able to quickly and safely remove the clog without damage.


Whether you have a clog in your shower drain or you smell an unpleasant odor coming from your kitchen sink, cleaning the inside of your piping is often simple enough to do on your own.

Safe Methods First: Minor buildup and organic clogs can easily be cleared using a plunger or plumbing snake, combined with a simple mixture of warm water and dish soap or a pipe-safe enzyme cleaner.

Avoid Harsh Chemicals: PVC is highly durable and corrosion-resistant, but harsh chemical cleaners can still cause damage or create dangerous reactions if mixed; always check product labels carefully before application.

Proactive Maintenance: Routine cleanings prevent grease and hair from turning into severe blockages, saving you from having to disassemble your pipes or call a professional plumber.

FAQs

Can I use harsh chemical drain cleaners to clear a clog in my PVC pipes?

While PVC is incredibly durable and corrosion-resistant, chemical cleaners can cause severe damage to your plumbing system if used incorrectly. The blog highly recommends using enzyme or bacterial-based drain cleaners instead. They are completely safe for PVC and naturally break down organic matter like grease and hair without risking damage to the pipes or your health.

Do I need to take my plumbing apart to clean a buildup inside the pipe?

In most cases, no! Because PVC is completely nonporous, debris and slime wash away much easier than they do in metal or copper pipes, which deal with rust and rough surfaces. A combination of a plunger, a plumbing snake, or the hot water and dish soap method will usually clear things out without you ever needing to disassemble the piping.

How can I tell if my PVC pipes need to be cleaned before a major clog happens?

The biggest warning sign is slow-draining water in your sinks, showers, or washing machines. Catching this early means you can flush the line with warm water and dish soap or a mild enzyme cleaner to dissolve grease and buildup before it turns into a full-blown backup.

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Mark Ligon

Mark Ligon is the marketing manager at PVC Fittings Online, a supplier of commercial PVC and CPVC pipe, fittings and valves. Ligon enjoys educating businesses on the parts of piping systems so managers can make informed decisions. He can be reached at webmaster@commercial-industrial-supply.com.

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