What are the 4 grades of copper pipe?

### What are the 4 grades of copper pipe?

Copper pipes come in four main grades, which are Type M, Type L, Type K, and Type DWV. Each grade is identified by its thickness and intended use in plumbing systems.

### Type M.

Type M copper pipe is the thinnest and most affordable grade available. It is commonly used for residential water supply lines. Type M copper is suitable for both hot and cold water lines, but it is not recommended for underground applications or where the pipe may be exposed to harsh conditions.

### Type L.

Type L copper pipe is thicker than Type M and is often used in residential and commercial plumbing applications. It is more durable and can withstand higher pressures, making it suitable for both hot and cold water lines. Type L copper is also commonly used for underground installations and is more resistant to corrosion compared to Type M.

### Type K.

Type K copper pipe is the thickest and most durable grade of copper available. It is commonly used in commercial and industrial applications where high pressure and corrosive conditions are present. Type K copper is also suitable for underground installations and can withstand freezing temperatures. It is the most expensive grade of copper pipe but provides the highest level of strength and reliability.

### Type DWV.

Type DWV copper pipe is specifically designed for drainage, waste, and vent systems. It is thinner than Type M copper and is not suitable for carrying pressurized water. Type DWV copper is commonly used for sewer lines, vents, and other non-pressurized applications in residential and commercial buildings.

In summary, the four grades of copper pipe - Type M, Type L, Type K, and Type DWV - offer varying levels of thickness and durability to meet the specific needs of different plumbing systems. Choosing the right grade of copper pipe is essential to ensure the longevity and efficiency of your plumbing system.

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