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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)
compression ferrules (rings)
heading-compression-ferrules compression ferrules (rings)
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compression nuts (female compression)
compression nuts (female compression)
heading-compression-nuts compression nuts (female compression)
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compression x compression couplings (unions)
compression x compression couplings (unions)
heading-compression-couplings compression x compression couplings (unions)
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compression x compression reducer couplings (unions)
compression x compression reducer couplings (unions)
heading-compression-reducer couplings compression x compression reducer couplings (unions)
0.00
compression x male (mipt) adapters
compression x male (mipt) adapters
heading-compression-male-adapters compression x male (mipt) adapters
0.00
compression x female (fipt) adapters
compression x female (fipt) adapters
heading-compression-female-adapters compression x female (fipt) adapters
0.00
compression x compression 90 degree ells
compression x compression 90 degree ells
heading-compression-ells compression x compression 90 degree ells
0.00
compression x male (mipt) 90 degree ells
compression x male (mipt) 90 degree ells
heading-compression-male-ells compression x male (mipt) 90 degree ells
0.00
compression x compression x compression tees
compression x compression x compression tees
heading-compression-tees compression x compression x compression tees
2.51
3/8 OD compression x 1/2 copper
3/8 OD compression x 1/2 copperSKU 04-625$2.512.51
04-625 3/8 OD compression x 1/2 copper
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compression x compression shut-off valves
compression x compression shut-off valves
heading-compression-shut-off-valves compression x compression shut-off valves

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.