Pipe Fittings

Copper (Pressure & DWV)


Copper fittings are used in hot and cold water lines in plumbing systems when making connections to copper pipe. Copper fittings can be used with both rigid and soft flexible types of copper pipe. Rigid pipe is generally installed in new homes and provides a neater installation. Flexible copper pipe is best for repair work since it can be run around obstacles without connections or cuts.

N&N Supply stocks many different types of copper fittings, each serving a particular function in both pressure and drainage.

PVC DWV (Drainage)

Polyvinyl chloride, commonly known as PVC, is more cost-effective than other materials, resists cracking, isn't affected by acids, and can be rigid or flexible. Because of its strength and resilience, PVC is used for many things. Depending on its width, it can be used to move liquid and gases safely. Owing to its composition, PVC is limited to carrying liquids at temperatures less than 140 degrees, making PVC unsuitable for carrying hot water.


CPVC has similar uses as PVC, but because of the chlorinating process, CPVC is able to withstand higher pressures and temperatures. CPVC has an upper temperature tolerance of 180 degrees, so it can be used for hot water pipes which contribute to its popularity as a material for water piping systems in residential as well as commercial construction. 

PVC Schedule 40

Schedule 40 fittings are pressure fittings used for potable water, chilled water, irrigation, golf courses, and pools/spa applications. 

Schedule 80 PVC

Applications with high water pressure may require Schedule 80 PVC. (**Requires Special Order**)

Black Malleable

Black fittings (black malleable iron fittings) are used to make connections to black iron pipe. 

Galvanized Iron

Galvanized fittings are used for countless outdoor and industrial applications to protect against corrosion and salt. Galvanized pipe and fittings may be used in most applications with the exception of underground lines. They work best with cold water lines, but are suitable for hot water lines as well. The main advantage of using galvanized fittings is their superior rust resistance when compared to black and copper fittings.

Cast Iron

Cast iron fittings are generally used in steam heating applications. They are highly durable and practically indestructible. They do not react with most chemicals and won't melt or burn, even in extreme conditions. They have a long lifespan which minimizes the need for replacement and repairs.


Brass is one of the most common materials used for pipe fittings. It is best known for its incredible strength and excellent ductility in high temperatures. Brass fittings are commonly used in plumbing applications because they are best suited to hot-water distribution lines. However, they are not quite as ductile in colder temperatures. They have good conductivity and a low magnetic permeability. 

Brass has a longer lifespan than many alternative metals, such as steel. It offers great corrosion resistance from salt water, acids, minerals, and peaty soils contained in water. Brass is a soft metal that is easy to install and creates a tight seal. It offers many of the same advantages of copper, but provides a heavier wall. 

Stainless Steel

Stainless Steel Fittings are made of corrosion-resistant 304 and 304L type stainless steel for long lasting durability and dependability. Ideal for chemical, petro chemical, power generation, OEM manufacturing industries and other applications where vibration, high pressure or extremely corrosive conditions exist.

Chrome Plated Brass

Chrome plated brass fittings can be utilized in low pressure applications for water oil and gas. Fittings have pressure ratings of 125 psi for steam. They offer superior corrosion resistance and the material's relative softness allows for easy installation and a tight seal. Chrome plated brass fittings are often utilized because they are easy to clean, do not attract dirt and bacteria, and maintain a shiny finish.

No-Hub & Service Weight Cast Iron (Soil Fittings)

Cast Iron is the premier piping material for sanitary and storm drain, waste, and vent applications. It has been used in these applications for hundreds of years and is for non-pressure applications where temperatures will not exceed 212° F.

It is the most durable DWV piping system available and can be used in all types of construction. It has high crush strength, is noncombustible, and offers superior sound-deadening performance.



Compression fittings are used to connect two pipes. They are composed of three pieces: a body, nut, and gasket ring (or ferule). They use pressure to tighten connections, which prevents leakage. Compression fittings are commonly used under faucets or fixtures to provide a water tight seal. They are ideal in applications that require occasional removal or disassembly for maintenance. Compression fittings are inexpensive and provide a long lasting connection.


A flare fitting is a type of compression fitting used in plumbing, oil, and gas line connections. Flare fittings can easily be taken apart with only a wrench, and won't leak even if they are repeatedly opened and closed. Since they don't need to be soldered, no flames are required to make the connection. Flare fittings are common when dealing with high water pressure or high gas distribution. A flare connection can withstand enormous pressure and vibration.

Dielectric Union


A dielectric union is utilized in a plumbing system to make a connection between two pipes of dissimilar metal (such as copper and galvanized Steel). The installation of a dielectric union to separate the two dissimilar metals will prevent corrosion that would otherwise occur over time. They are used in many common residential and commercial applications including: hot water storage tanks, water and air conditioners, and processing tanks and are commonly found in steam, gas, and water piping systems.


PEX fittings are utilized to make connections from PEX tubing to PEX tubing, PEX tubing to manifolds, PEX tubing to copper, PEX tubing to faucets & fixtures, and a variety of other applications. Fittings are commonly made of brass but are also available in plastic, bronze, and even stainless steel. 

Press (ProPress)

ProPress fittings are the future of the plumbing and heating industry. Contractors across the country have put down their torches in favor of the Press Fittings System. This system has rapidly become the preferred method for joining stainless steel tubing in a fast, clean manner. Pressing pipe connections saves time and labor compared to traditional soldering.


SharkBite push-fit fittings are designed to connect to PEX, copper pipe, or CPVC in a matter of seconds. SharkBite fittings are made of brass, making them strong and corrosion resistant. These fittings can be disassembled with a disconnect tool if repair is required.