Bathroom Plumbing Mistakes to Avoid

Bathroom Plumbing Mistakes to Avoid

Are you looking to update your bathroom’s plumbing, or just do some routine maintenance? You may think that plumbing is a straightforward task, but there are a few mistakes you can make that could be costly in the long run. Whether you’re DIY-ing the project or hiring a plumber, avoid these common traps and make sure the job is done right.

Here are a few of the most common plumbing mistakes to watch out for:

  • Not using the right tools or materials for the job.
  • Not following local plumbing codes.
  • Using the wrong size pipes.
  • Not using the correct sealant.
  • Not testing for leaks after installation.

Forgetting to Put Bags on Drains.

Installing bathroom drains without first placing bags on them is a mistake that any homeowner – and even some experienced plumbers – can make. Bags are not an optional accessory for most drains, but rather an essential piece of equipment that prevents debris from clogging them. Whether it’s a shower drain or a sink, be sure to first place the bag flush against the wall surface in order to ensure proper drainage, as most drains rely on the bag and its ability to collect hair and other undesirable sediment.

Without one, you risk clogs forming in your plumbing system in no time at all. Additionally, bear in mind that different drain sizes will require different sized bags; be sure to use appropriately sized bags for maximum efficiency and minimal maintenance later on. Failing to put bags on your plumbing fixtures may also lead to foul odors emanating from inside your drains as bacteria builds up over time with no easy outlet!

Over-tightening the Connections.

One of the most common bathroom plumbing mistakes to avoid is over-tightening the connections for fixtures and pipes. If you maintain your bathroom plumbing, it is possible that you’ll need to make repairs or replacements from time to time. When you are dealing with pipe connections, using a wrench to secure them into place is recommended, but it’s important not to over-tighten them. Doing so can cause fractures within the pipes, lead to stripping of threads on the fittings and even cause leaks due to stress on these components.

When tightening or loosening the specialized connectors (such as those used on sink supply lines), be sure to use a torque wrench if one is provided or recommended by the manufacturer; this will help ensure an even amount of pressure is applied during each turn and secure a tight connection without damaging either component. When installing a new faucet, use thread sealant tape around the threads and secure just past finger tight; this will prevent leaks while providing enough room for expansion and contraction of the water pipes in response from heating/cooling temperatures.

If You Forget to Switch Off the Main Water Line.

If you forget to switch off the main water line before starting any plumbing repairs in your bathroom, there can be potentially damaging consequences. This can cause a catastrophic flood and could even result in extensive water damage. Plumbing repairs are often best left to professional plumbers, as they possess the necessary qualifications and experience to ensure that the job is done correctly.

When making DIY repairs to your bathroom plumbing, it is essential to make sure that you switch off the main water line before commencing work. This will prevent potentially serious incidents from occurring, such as flooding and subsequent water damage. Aside from switching off the main water line, here are some other mistakes that you should avoid:

  • Attempting complex repairs without the right tools or expertise
  • Not turning off all the valves and taps prior to starting work
  • Failing to adequately clean fixtures or pipes
  • Using incorrect sealants or fittings
  • Over tightening screws or pipes which can lead to damaged joints
  • Accidentally leaving key components out of a repair due to oversight

The Use of Galvanized Pipes.

Galvanized pipes are metal pipes that have been coated with zinc in order to help prevent corrosion. While they have been commonly used to pipe water supply in the past, their use is now discouraged due to a number of drawbacks.

  • Galvanized pipes can corrode over time, leading to water contamination and leaks.
  • They are also prone to clogging since the zinc coating collects mineral deposits that can buildup and lead to clogged pipes or inefficient water pressure.
  • Additionally, galvanized pipes can become magnetized over time and cause interference with electrical wiring and appliances such as dishwashers and washing machines.

For these reasons, it is recommended that galvanized pipes be replaced with newer plumbing materials such as copper or PVC (polyvinyl chloride) piping whenever possible.

Not Paying Attention to Pitch.

The pitch of a bathroom’s drains is an important detail that is often overlooked when a bathroom is being renovated. The pitch of the pipes dictates how efficiently water will move through them, which can impact everything from the amount of time it takes for your shower to drain to the likelihood of flooding occurring in the bathroom.

If there’s not enough pitch in the pipes, it can lead to clogging or slow drainage. It’s important to make sure that any repairs or renovations take this into account, since even a small change in pipe placement or shape can have a big impact on pitch. When installing new drains and pipes, pay special attention to make sure they are slanted appropriately so the water will flow freely and easily through them and consult with an experienced plumber if you need help determining the best pitch for your plumbing set up.

Fixing Shower Heads in the Wrong Side

When installing new shower heads, it is important to ensure that they are securely attached to the right side of the wall. It might seem like an insignificant detail, but installing a shower head on the wrong side can lead to a number of potential issues.

To start, if your shower head is installed on the wrong side – for example, the hot water side instead of cold – its flow could either be reduced significantly or could even drip continually if not adjusted properly. Additionally, several parts of your plumbing may have been designed to service only one type of water pressure so using hot water in place of cold or vice versa could eventually result in wear and tear over time.

If you plan to install a shower head yourself, make sure you double-check both the temperature and direction before finishing a job. If unsure whether you’re doing it right or need more help with plumbing installations in general, reach out to a local plumber for assistance as soon as possible.


To conclude, when it comes to home plumbing jobs, taking the time to do it right and avoiding these common mistakes can save you time and money in the long run. As always, it’s best to contact a professional plumber if you encounter any issues that seem out of your wheelhouse. With reliable expertise and modern tools, a qualified plumber should be able to diagnose and remedy the issue with minimal stress – leaving you free to enjoy clean running water in your bathroom once again.

Frequently Asked Questions

What are some common mistakes to avoid when doing plumbing in a bathroom?

Common mistakes to avoid when doing plumbing in a bathroom include using the wrong size pipes, not using a watertight sealant, not using the correct fittings, not using a pressure regulator, and not correctly connecting the components of the plumbing system.

Is it important to use the correct fittings when doing bathroom plumbing?

Yes, it is important to use the correct fittings when doing bathroom plumbing. Using the wrong size fittings can cause leaks and other plumbing problems. It is also important to use a watertight sealant to ensure a secure connection.

What should I do to ensure a proper plumbing system in my bathroom?

To ensure a proper plumbing system in your bathroom, you should use the correct size pipes, use a watertight sealant, use the correct fittings, use a pressure regulator, and make sure all the components are securely connected.