How to Clean Boiler Pipes- Complete Guide

Do you have an inefficient boiler? If so, then how to clean boiler pipes? Scrubbing can be the most efficient way ever, and you should give it a shot. Confused about how to do that? Give it a read then.

Boiler pipes are often overlooked when maintaining a boiler, but they can be just as important to clean. If the tube is not maintained correctly, it could lead to corrosion and other damaging factors that can cost you more in the long run.

Moreover, this helpful guide will walk you through how to clean your boiler pipe so that it doesn’t cause damage to the rest of the system.

How To Clean Boiler Tube

Well, let us first discuss the materials you need to clean boiler pipes. There are special boilers cleaning chemicals, such as Inhibited Hydrochloric Acid, Hydroxyacetic Acid, EDTA ( Ethylenediaminetetraacetic acid ), Ammoniated Citric Acid, and  Inhibited Hydrofluoric Acid.

The ultimate thing is you can do both alkaline and acidic cleaning. All the cleaning chemicals have their own advantages and disadvantages.

However, we think following each one carefully will guarantee an excellent job in cleaning boiler tubes for a successful result.

First You Have To Turn Or Switch Off The Boiler

First of all, you have to turn off your boiler. Then you should wait for 2 to 3 hours before handling any components or parts which can get very hot because they’ve been sitting near an open flame for so long.

Once the temperature has lowered significantly – around 120 degrees Fahrenheit (depending on model) is ideal- use screwdrivers with care to remove the front and top cover.

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To vent safely, you need to protect your home appliance from being damaged by installing the vent stack without damaging anything else inside. Make sure pets are away, and be mindful of not only of yourself but also their claws if anyone lives there at the time of installation.

What To Do Before Scrubbing The Tubes?

Before you go to the scrubbing part, you have to know a few essential things. Such as, the original cleaning process of the boiler can take up to from 16 hours to 72 hours.  So, all the iron is removed completely.

Ensure that all the chemicals are in stable condition before scrubbing. Look after the inhibitor, as it might break down if you are using an acidic solution and it is not well-drained.

The Next Step Is To Scrub The Tubes Properly and Clean The Boiler Unit

When you take the cover off, it’s like taking a peek into another world from the boiler. The air filter and tubes in your heat exchanger are all cleanable with just water.

First, brush away any soot or dust from each tube until the base, where you may use detergents. If needed before, let them dry thoroughly afterward for best results.

Once the tubes are dry, vacuum them to remove any dirt and dust from around your boiler.

Then, use your vacuum to remove any obstructions from around the boiler and make sure there is no dirt or dust in sight.

After This Reassemble The Unit and Turn On Your System

Now that you’ve got yourself a clean and shiny boiler, it’s time to get back in there. Reassemble all of the pieces.

Ensure your thermostat is set at its average temperature before restarting, so nothing else breaks (and look for blue flames).

Then test out if everything works like usual again. Your boiler system is ready.

Take Help of An Expert Engineer Or The Cleaning Companies

It is always best to contact an expert engineer if you are not able to do it yourself.

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This way, they will ensure everything about the safety of their work and procedure is recorded following all regulations and record each visit.

A registered engineer will make sure to turn your boiler off and follow all safety regulations while going through the motions of cleaning it. If you own a water-tube boiler, then these recommendations still apply.

Boiler Pipe Cleaning

Boiler pipe cleaning is the most critical job in your house. If you don’t take care of this correctly, there can be an accident at any time! It’s essential to keep your boiler clean and free from soot.

Soot will reduce the efficiency of a boiler, which may lead you to spend more money on energy bills to avoid unnecessary repairs or replacements. The combusted soot in your boiler can reduce the efficiency of that system by up to 8%.

The Tubes are exiting your boiler hot water. They too can become dirty because of mineral deposits over time which reduces heating efficiency and leads to weaker pipes or boiler breakdowns!

Boiler Pipes and Tubes Are The Heart of A Boiler System

The boiler is the engine of your home, and it provides you with hot water, heat, and electricity to power all sorts of appliances in your daily life!

But what if something goes wrong? Just think about it. As they pump hot water around for you to use, your whole home will be left without heat or running appliances if these vital components go down!

The pipes will stop working, so it’s essential for maintenance every now then, or else things can get terrible fast.

This Video Will Help You Too!

Frequently Asked Questions (FAQs)

How do you flush a boiler pipe?

The best way to flush a boiler pipe is to remove any debris trapped in the line. The easiest way is to take off the metal cover on top to place your hand or something else and pull it back.
You should not need anything like boiling water or vinegar to make this work.

How do you remove scale from boiler tubes?


If you’ve been in the trenches of your boiler room for a while, it may be time to clean those pipes. Follow this guide on how to clean boiler pipes, and we promise you won’t regret it.

Follow each and every step shown above carefully so that you do not damage your boiler pipes.

After the cleaning, you might see black water coming from the boiler pipes. There is nothing to get scared about because it is the iron that was not dissolved and drained well. 

As a beginner, it can seem a very difficult task, but after some experience, it will become very easy to handle. Yet, you need to be very careful when working with chemicals while boiler pipe cleaning.

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