Plum Brass Compression-Groups
Compression fittings
These are used primarily for water on copper, vinyl or poly (plastic) tubing. They may be used for oil, but we recommend flare fittings instead.
Unless labeled "lead-free," these fittings may not be used in potable water systems.
Do NOT use these compression fittings for lines carrying pressurized gases.
Compression threads are a very different pitch from iron pipe size threads (or national pipe thread taper). Use a male or female adapter to transition between them.
All compression fittings are listed by OD [outside diameter]. See chart at the bottom of this page for OD to ID comparison.
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compression ferrules (rings)
Replacement ferrules (rings) for compression fittings. Use brass ferrules on copper and aluminim tubing. Use nylon ferrules on vinyl and poly tubing. Never re-use ferrules.
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compression nuts (female compression)
Replacement brass compression nuts for compression fittings. Compression nuts can be re-used. Examine them for hairline cracks or stripped threads.
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compression x compression couplings (unions)
Compression couplings are used to join two pieces of the same size tubing. They also act as unions because they can be taken off and put back together by loosening one or both nuts.
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compression x compression reducer couplings (unions)
Compression reducer couplings are used to join two pieces of different size tubing. They also act as unions because they can be taken off and put back together by loosening one or both nuts.
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compression x male (mipt) adapters
Compression x male adapters attach tubing to a female (fipt) pipe thread fitting.
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compression x female (fipt) adapters
Compression x female adapters attach tubing to a male (mipt) pipe thread fitting or threaded pipe.
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compression x compression 90 degree ells
Compression ells join two pieces of the same size tubing to form a 90 degree bend. Use these compression ells when a short radius turn is needed to prevent kinking the tubing.
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compression x male (mipt) 90 degree ells
Compression x male ells attach a piece of tubing to a female (fipt)fitting to form a 90 degree bend. Use these compression x male ells when a short radius turn is needed to prevent kinking the tubing.
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compression x compression x compression tees
Compression tees join three pieces of the same size tubing to form a tee connection. Use these compression tees to branch off of an existing tubing.
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compression x compression shut-off valves
Compression shut-off valves join two pieces of the same size tubing and allow the flow of liquid to be turned off and on.
read more ▼O.D. [Outside Diameter] to I.D. [Inside Diameter] Tubing Size Conversion
| tubing o.d. | tubing i.d. |
|---|---|
| 1/4" | 1/8" |
| 3/8" | 1/4" |
| 1/2" | 3/8" |
| 5/8" | 1/2" |
| Example:
Use 1/2" flare fittings
on 3/8" i.d. copper. |
|
| For small sizes, i.d. plus 1/8" equals o.d.. | |
| Definitions: | |
|---|---|
| comp = male threaded compression fitting. | |
| mipt = male iron-pipe-size thread fitting. | |
|
fipt = female iron-pipe-size thread. |