Taking on plumbing projects can be rewarding, but common mistakes can turn a simple DIY job into an expensive headache. From scratching fixtures to bending pipes, even small errors can lead to bigger problems down the line.
Ask This Old House‘s own plumbing and heating expert Richard Trethewey explains some common plumbing mistakes—and shares his expert tips on how to avoid them—in the above video. Let’s break it down.
Tools for Proper Plumbing Work
Having the right tools for the job helps you avoid rookie plumbing mistakes. Quality tools can make your plumbing projects easier and help prevent costly errors. Here are some essential tools every DIY plumber should have on hand:
- Adjustable pliers
- Pipe cutter
- Pipe wrench
- Plumber’s tape
- Plunger
- Strap wrench
Strap wrench- Pipe wrench
Tips for Successful DIY Plumbing Projects
To increase your chances of success with your DIY plumbing projects, remember these tips:
- Research your project thoroughly before starting.
- Turn off the water supply before beginning any work.
- Have a bucket and towels ready nearby for any unexpected leaks.
- Take pictures of your plumbing setup before disassembling anything for easier reassembly later.
- Use plumber’s tape on threaded connections to prevent leaks.
- Don’t overtighten fittings, as this can cause damage or leaks.
Common Rookie Plumbing Mistakes To Avoid
Understanding the most common errors made by novice plumbers can help you prevent damage to your own home’s plumbing system. Here are some of the most common mistakes and how to steer clear of them.
Scratching Plumbing Fixtures
One of the most visible and frustrating mistakes is damaging the finish of plumbing fixtures. Chrome faucets and shower heads are particularly susceptible to scratches. This often comes from improper tool use.
To avoid scratching your plumbing fixtures:
- Use a strap wrench instead of pliers or a pipe wrench.
- Wrap the flexible strap around the fixture securely.
- Slowly pull on the handle to turn the fixture.
A strap wrench firmly grips the fixture without the risk of teeth marks or scratches, preserving the appearance of your fixtures.
Deforming Pipes
When you’re working with old piping, such as those connected to steam radiators, using the wrong technique can lead to pipe deformation.
To avoid bending your pipes, do this:
- Make sure the pipe wrench contacts the pipe in three places: the top jaw, bottom jaw, and back of the wrench.
- Loosen the wrench slightly to achieve the three-point contact.
- Apply force evenly to maintain the pipe’s round shape.
Incorrect Fastener Length
When you’re installing plumbing components to subfloors, such as radiant flooring heat transfer plates, using fasteners that are too long can lead to serious problems. To avoid this mistake:
- Choose screws or nails of appropriate length.
- Make sure the fasteners don’t poke through the finished floor above.
- Test one fastener before installing multiple.
Maintaining Your Plumbing System as a Beginner
Regular maintenance can prevent many plumbing issues and extend the life of your fixtures and pipes. Here are some general maintenance tips:
- Clean drains to prevent clogs.
- Flush your water heater annually.
- Inspect visible pipes for signs of corrosion or damage.
- Know the location of your main water shut-off valve.
- Regularly check for leaks and address them quickly.
Dealing With Unexpected Plumbing Issues
Even with careful planning, unexpected issues can arise. Being prepared can help you address them and minimize damage to your home. Here are some steps to take:
- Keep extra fittings and supplies available on hand.
- Use a wet/dry vacuum handy for water cleanup.
- Know how to shut off the water supply quickly in an emergency.
- Familiarize yourself with the basics of your home’s plumbing layout.
DIY Plumbing for Different Home Areas
Different areas of your home have unique plumbing requirements and challenges. Understanding these can help you stop problems before they happen.
Kitchen Plumbing Tips
The kitchen is a hub of plumbing activity, with fixtures like sinks, dishwashers, and garbage disposals. Here are some tips for tackling kitchen plumbing:
- Check dishwasher hoses regularly for leaks and wear.
- Frequently clean the sink drain to prevent buildup.
- Use a plumber’s snake to clear stubborn sink clogs.
Bathroom Plumbing Tips
Bathrooms host a variety of plumbing fixtures, including sinks, toilets, and showers. Proper maintenance and care can prevent common issues:
- Fix leaky faucets quickly to conserve water and prevent damage.
- Inspect toilet components for wear and replace them as needed.
- Regularly clean your showerheads to remove the mineral deposits clogging them.
Laundry Room Plumbing Tips
Laundry rooms often have washing machines and utility sinks, both of which need plumbing care:
- Check washing machine hoses for cracks and replace them if necessary.
- Clean the utility sink drain to avoid clogs.
- Make sure the washer is level to prevent vibrations and leaks.
When To Call a Professional Plumber
Some plumbing tasks are best left to the experts. We recommend you contact a professional plumber if:
- The job requires specialized tools or knowledge.
- The project involves gas lines.
- There are main sewer line issues.
- You’ve tried a repair, but the problem persists.
- You’re unsure about your local plumbing codes.
