What Are the DIY Plumbing Mistakes You Need to Avoid?

Doing home renovations yourself can be daunting and time-consuming, especially if you don’t have the right skills or tools. It requires careful planning and dedication to ensure a successful outcome.

From installing the wrong size pipes to not turning off the water supply before you start working, many common DIY plumbing mistakes can lead to expensive repairs.

Knowing what to watch out for will help you make sure your plumbing projects are successful and cost-effective. Read on to learn more about five DIY plumbing mistakes you need to avoid:

1. Clearing Clogs Through Chemical Drain Cleaners

Many types of store-bought drain cleaners contain harsh chemicals that can cause serious burns if they come into contact with the skin. 

Using these chemical drain cleaners can be harmful to home plumbing. Their powerful dissolving properties can corrode both metal and plastic pipes, leading to leaks and other damage. Over time, this can weaken the integrity of the plumbing system and cause costly repairs.

Rather than using dangerous liquid drain cleaners, it’s better to invest in a plumbing snake. Snakes are more effective at cleaning out clogged pipes and can help avoid the need for professional drain cleaning services.

2. Forgetting to Turn Off the Main Water Valve

Shutting off the main water supply valve is the first and most important step before attempting any plumbing job, even if it’s a simple one. It’s essential to prevent water from flowing out of the pipes and flooding your home.

If you are not extra careful when dealing with plumbing, you might end up with a mess. If you are too forceful while tightening a pipe, it could break, leading to a lot of water spilling out and ruining your house.

To shut off the main water supply for your home, locate the valve near the water meter outside your house. If it’s not there, it should be close to the curb. Turn the valve clockwise to shut it off. This should only take a few minutes.

3. Making Pipe Connections Too Tight

DIYers may be tempted to make pipe connections as tight as possible to help prevent leaks, but doing so can cause more harm than good. Overtightening can put too much stress on the joints and fittings, leading to cracks and ruptures.

4. Using the Wrong Tools

In order to do a successful DIY home plumbing project, you must have the right tools. Without the right tools, you risk damaging plumbing pipes and fittings. For example, if you don’t have the right wrench, such as an internal pipe wrench, you could end up breaking the pipe while trying to work.

5. Overestimating DIY Abilities

Being a handyman can be useful and rewarding, but it is important to be aware of your limitations. If you attempt to fix a plumbing issue and the problem persists, it is best to call a professional. There may be a deeper issue at play that can only be recognised and corrected by a plumbing expert.


There you have it, all the five most common DIY plumbing mistakes that you should never commit. Before attempting any plumbing repair or installation, remember to assess the situation and determine if your skill set is up to the challenge. If not, it’s in your best interest to call a professional. Failing to do so could result in expensive water damage or even health hazards.

Do you have multiple leaky faucets or clogged plumbing pipes that are too much for a DIY project? Jensen Property Maintenance is here to assist you. As a property maintenance firm,  we are dedicated to providing repairs, maintenance and installation of all commercial and residential plumbing systems in Central and Greater London. Contact us today.