What Does FIP and MIP Mean In Plumbing?

What Does FIP and MIP Mean In Plumbing?

What Does FIP and MIP Mean In Plumbing?

What Does FIP and MIP Mean In Plumbing?

If you’re new to the world of plumbing, you may have noticed an overabundance of acronyms used in the field.  For laymen. this can be a major barrier to learning about plumbing.  As plumbers, we love to teach people about plumbing and want information to be easily accessed and understood, even if you didn’t go to trade school.  One of the most common parts of plumbing to use acronyms is in the realm of pipe fitting.  There are many different types of pipe connections, and each of them has a unique name (often represented by an acronym).  A few you may have heard are the terms “FIP” and “MIP”; what are they?


What Do FIP and MIP Mean?

FIP means Female Iron Pipe.  This is a common type of pipe fitting, which has internal threads.  Threads are a raised spiral pattern either inside or outside a fitting that can connect to another by twisting; the FIP has them on the inside.  The FIP is also known as the FPT or Female Pipe Thread when it is featured on a pipe not made of iron.

As you may have guessed, MIP stands for Male Iron Pipe.  This is the opposing type of pipe fitting that connects with FIP threads.  The MIP has its threads on the outside, which allows it to screw into a pipe with FIP threads.  Similarly to the female, the MIP is also known as the MPT or Male Pipe Thread when not made of iron.

Pipe Fitting Threads

The FIP and MIP pipe fittings are the most common types of fittings used by plumbers today; in the US, threaded pipes are generally held to a national standardization called NPT or National Pipe Thread.  NPT is most commonly referring to the tapered type, rather than the straight type, which is NPS.  The FIP and MIP thread types can be standardized to these national specifications, with the tapered type becoming FNPT and MNPT.

Of course, unless you’re planning to do some more complicated plumbing, you likely won’t need to be familiar with more than that, though there are many more plumbing acronyms out there.  You likely are familiar already with female and male iron pipe threads, such as those on hoses or the inside of your faucet.  These connectors are commonly used for water pipes, though a plumber may add tape or rings to prevent leaks.

If you’re dealing with a plumbing problem, consider reaching out to us at Mainline Plumbing for help.  While we always encourage you to be knowledgeable about plumbing, some things should be left to the professionals.  We offer all sorts of plumbing services and repairs; reach out to us by phone or visit our online contact form!

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