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Before deciding which type of pipe to use for your DIY project, you must look at the available varieties.

For plumbing purposes, manufacturers make both soft and hard copper pipes. Both these types of copper pipes are suitable for supplying water. But it would be best to remember that both come with distinct advantages and disadvantages.

A soft copper pipe is easy to bend and does not need additional turning tools. Inflexible, rigid copper piping, on the other hand, usually needs bending equipment. So, to make tasks easy, people generally prefer to cut and use them instead of trying to join the pipes using a bending tool.

People use complex type L and M copper pipes to construct water supply lines in most residential and commercial plumbing properties. To know all about them, keep reading!

The Most Common Types Of Copper Pipes

Pipe manufacturers make copper pipes in four regular types: L, M, K, and DWV. If you wonder what these letters mean, let us break them down. The letters on the pipes indicate their relative thickness, but remember that the pipe’s size determines its thickness.

To simplify, the letter codes we just mentioned also relate to the colour code of the printing on the side of the pipes. For example, Type M copper pipe is red and called red pipe. On the other hand, Type L copper pipe is blue and is referred to as blue pipes.

Man Holding Copper Pipes Fittings

Type L And Type M Pipes: The Differences

Wall thickness and pressure rating are crucial elements that separate Type L and Type M pipes. Two of the most common sizes on the market are three-quarter-inch and half-inch in thickness.

Type L three-quarter-inch pipes have a wall thickness of 0.045 inches, while Type M pipes have a thickness of 0.032 inches. On the other hand, a half-inch Type L pipe is 0.040 inches, and Type M is 0.028 inches.

Apart from that, what differentiates Type M and Type L pipes are their costs. Our market survey gathered that Type M pipes are cheaper than Type L.

If you are wondering why that is the case, it is because of the difference in the wall thickness of the pipes. Type L pipes have thicker walls, weigh more, and are priced higher.

Because the walls have to be thicker for Type L pipes, the amount of copper that goes into manufacturing them is relatively much higher. It is understandable why the production costs are higher for Type L pipes. Also, as the Type L pipe is heavier, transportation costs shoot up considerably.

That said, copper pipes are generally relatively easy to work with, as all pipes of similar sizes have the same exterior diameter. So, it is convenient to use them for plumbing connections. Remember that the inside diameter of the pipes will vary depending on the type you choose to work with.

For example, the inside diameter of a Type L pipe is 0.545 inches, while that of a Type M is 0.569 inches.

What Should You Use: Type L Or Type M Pipes?

Types Copper Pipes

As mentioned, the major difference between these two pipes is their thickness. But the question remains when one should use Type L pipes and when one should use Type M pipes.

A general rule of thumb is to go for Type L pipes if you plan to use one for the water supply in your building. Type M pipes are suitable for all other purposes but not that great for water supply that involves heavy water pressure.

It is also important to note that Type L pipes tend to last longer as they are thicker. If you are using Type M pipes, the longevity they will offer is pretty low and might need to be replaced soon. So, if you want durability, you should choose these pipes over Type M pipes.

Most plumbers recommend using Type M pipes for relatively cheaper heating systems. You can also use Type L pipes for this purpose, but the costs will increase.

Type L pipes are durable and can last around 80-100 years. On the other hand, plumbers believe that Type M pipes would need to be replaced in 20-30 years.

Suitability: Type M Vs. Type L

When using copper wire for residential water supply, you can opt for Type M or Type L, depending on the requirements set by the local codes. In most places, both these pipes are rated quite well and handle the water pressure levels in the water supply system sufficiently.

Understandably, homeowners prefer Type M over Type L for large projects as the cost difference is quite significant. To ensure that the water supply systems perform, it is best to check if all the building materials match the local code requirements.

Understanding Copper Pipes

With that, we have now reached the end of this informative guide! After reading this, we hope you will better understand the differences between Type L and Type M copper pipes.

It is clear that they both have their unique advantages and disadvantages, and you need to select one that suits your requirements. If you have any suggestions you would like to share with us, please write to us in the comments section below.

Don’t hesitate to contact our team for any pipe installation, replacement or repair in Perth. We are the leading Perth plumbing company for blocked drains, pipe repair and installations!

Ashley Woolf

Ashley Woolf

Find them on their website: Woolf Plumbing & Gas, Facebook and LinkedIn.

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