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Flared fittings use a flare and a nipple for the sealing surface. The threads do not serve any purpose as to actually sealing anything. The threads merely hold the flare of the one fitting together tightly with the nipple of the other fitting to create a seal.

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11y ago

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What is a flare connection?

A flare connection is a type of plumbing or fluid connection where a flared fitting is used to connect a pipe or tubing. This fitting has a cone-shaped or flared end that mates with a mating surface to create a seal. Flare connections are commonly used in refrigeration and air conditioning systems.


What is the difference between flare fitting threads and compression fitting threads?

Flare fitting threads have a 37-degree cone shape that creates a tight seal when the flared end of a tube is inserted and tightened, making them ideal for high-pressure applications. In contrast, compression fitting threads use a straight thread and rely on a compression ring (ferrule) to create a seal as the nut is tightened, allowing for easier installation and disassembly. While both types of fittings are used in plumbing and HVAC systems, flare fittings are generally preferred for gas lines, whereas compression fittings are often used in water and air lines.


What is flare copper pipe?

When soft copper tubing is used the end is flared so that it can seal against the fittings. A flaring tool is used to spread the end of the tubing so that it looks like a small funnel. When you tighten the nut onto a fitting it compresses the copper against the flare on the fitting and makes a seal. It is a dry seal, no pipe dope should be used on a flare fitting. This is almost always on a gas line of some sort, air, natural gas, propane or some other gas. It can be used for liquids, but generally isn't.


What fitting will be used to connect the water service pipe to feed pipe for the house?

Water main coming into house usually 3/4" K copper pipe. Depending on local plumbing code, fitting usually is flared or soldered.


What type of compression fittings can be used on an underground copper service pipe?

I am a Plumbing/HVAC Contractor and the type of fitting I always used for underground copper service pipe has been 3/4" (standard size for residential) brass flared fittings. A flared connection is a tight, secure connection guaranteed not to leak.


What does a flare nut do?

A flare nut, also known as a flare fitting or flare nut fitting, is used to connect tubing or piping in hydraulic and plumbing systems. It features a conical shape that allows for a secure connection when tightened onto a flared end of a tube, creating a leak-free seal. Flare nuts are commonly made from materials like brass or steel and are essential in applications where high pressure is involved, ensuring reliable fluid flow.


What is conduit fitting?

Conduit fitting is used on metal pipes that house electrical wires. These fittings are not only to connect the various pieces together, but to keep a relatively water tight seal to the wires.


When replacing a compression fitting can the old ferrule be used?

No, it is not recommended to reuse an old ferrule when replacing a compression fitting. The ferrule is designed to create a tight seal and may have deformed during the initial installation, compromising its effectiveness. Using a new ferrule ensures a proper seal and reduces the risk of leaks. Always replace the ferrule with each new fitting installation for optimal results.


What is MNPT connection?

MNPT (Male National Pipe Taper) connection refers to a type of threaded pipe fitting that features a tapered male thread. This design allows for a tight seal when mated with a female NPT (National Pipe Taper) fitting. The taper helps to ensure a secure fit, preventing leaks in plumbing and piping systems. MNPT connections are commonly used in various applications, including water, gas, and hydraulic systems.


What are the differences between thread sealant and Teflon tape for sealing pipe connections?

Thread sealant and Teflon tape are both used to seal pipe connections, but they have some key differences. Thread sealant is a liquid compound that hardens to create a strong, permanent seal, while Teflon tape is a thin, flexible tape that is wrapped around the threads of the pipe to create a tight seal. Thread sealant is better for high-pressure applications and can be used on a wider range of materials, while Teflon tape is easier to use and is less messy. Ultimately, the choice between the two depends on the specific needs of the project.


What are the differences between pipe thread sealant and Teflon tape, and which one is more effective for sealing pipe threads?

Pipe thread sealant and Teflon tape are both used to seal pipe threads, but they work in different ways. Pipe thread sealant is a liquid compound that hardens to create a seal, while Teflon tape is a thin, flexible tape that is wrapped around the threads to create a seal. In general, Teflon tape is more effective for sealing pipe threads because it provides a tighter seal and is less likely to leak.


What is a CGA fitting?

CGA stands for the Compressed Gas Association. A CGA fitting is standardized system for the attachment of a compressed gas cylinder to the required regulator or transfer line. Examples of CGA fittings would be CGA-580 for Non-flamable, Non-oxidizing gasses such as Nitrogen, Argon, or Helium. CGA-590 is used for compressed air and CGA-326 is used for Nitrous Oxide. There are approximately a dozen commonly used CGA-fittings, with others used for special purposes. These welding fittings are typically used for welding applications, but can extend to other application such as medical and other gas uses. The fitting standards are designed to make the gas connections leak tight and also prevent different fittings from being mixed up. For example, flamable gas fittings have a left hand thread fittings. Oxygen and inert gases have right hand thread fittings. Since a left hand thread fittings cannot be threaded onto a right hand fitting, it is impossible to connect the fuel gas to the oxygen and vise versa. It is easy to determine whether the fitting is a left hand or right hand thread. The left hand fittings all have a small cut or slash on the nut of the fitting that denotes the left hand thread.