Malleable iron union (Ball-to-cone / ball-to-ball joint) is a detachable fitting with both female threaded connections. It consists of a tail or male part, a head or female part, and a union nut, with ball-to-cone joint or ball-to-ball joint.
Available size (Class 150)
| Size |
A (mm) |
Joint type |
Ref. No. |
| 1/4″ / DN8 / 13.7mm |
36.5 |
Ball-to-cone / ball-to-ball |
M8801 (UL) |
| 3/8″ / DN10 / 17.1mm |
41.0 |
Ball-to-cone / ball-to-ball |
M8802 (UL) |
| 1/2″ / DN15 / 21.3mm |
43.5 |
Ball-to-cone / ball-to-ball |
M8803 (UL/FM) |
| 3/4″ / DN20 / 26.7mm |
49.5 |
Ball-to-cone / ball-to-ball |
M8804 (UL/FM) |
| 1″ / DN25 / 33.4mm |
52.5 |
Ball-to-cone / ball-to-ball |
M8805 (UL/FM) |
| 1-1/4″ / DN32 / 42.2mm |
57.5 |
Ball-to-cone / ball-to-ball |
M8806 (UL/FM) |
| 1-1/2″ / DN40 / 48.3mm |
61.0 |
Ball-to-cone / ball-to-ball |
M8807 (UL/FM) |
| 2″ / DN50 / 60.3mm |
70.0 |
Ball-to-cone / ball-to-ball |
M8808 (UL/FM) |
| 2-1/2″ / DN65 / 73mm |
82.0 |
Ball-to-cone / ball-to-ball |
M8809 (UL/FM) |
| 3″ / DN80 / 88.9mm |
89.0 |
Ball-to-cone / ball-to-ball |
M8810 (UL/FM) |
| 4″ / DN100 / 114.3mm |
98.0 |
Ball-to-cone / ball-to-ball |
M8811 (FM) |
| 6″ / DN150 / 168.3mm |
132.0 |
Ball-to-cone / ball-to-ball |
M8813 (ISO) |
Available size (Class 300)
| Size |
A (mm) |
Joint type |
Ref. No. |
| 1/8″ / DN6 / 10.3mm |
32.0 |
Ball-to-cone / ball-to-ball |
M8800-300 (ISO) |
| 1/4″ / DN8 / 13.7mm |
39.5 |
Ball-to-cone / ball-to-ball |
M8801-300 (ISO) |
| 3/8″ / DN10 / 17.1mm |
43.5 |
Ball-to-cone / ball-to-ball |
M8802-300 (ISO) |
| 1/2″ / DN15 / 21.3mm |
46.0 |
Ball-to-cone / ball-to-ball |
M8803-300 (UL) |
| 3/4″ / DN20 / 26.7mm |
54.0 |
Ball-to-cone / ball-to-ball |
M8804-300 (UL) |
| 1″ / DN25 / 33.4mm |
58.5 |
Ball-to-cone / ball-to-ball |
M8805-300 (UL) |
| 1-1/4″ / DN32 / 42.2mm |
67.5 |
Ball-to-cone / ball-to-ball |
M8806-300 (UL) |
| 1-1/2″ / DN40 / 48.3mm |
72.5 |
Ball-to-cone / ball-to-ball |
M8807-300 (UL) |
| 2″ / DN50 / 60.3mm |
82.0 |
Ball-to-cone / ball-to-ball |
M8808-300 (UL) |
| 2-1/2″ / DN65 / 73mm |
84.5 |
Ball-to-cone / ball-to-ball |
M8809-300 (UL) |
| 3″ / DN80 / 88.9mm |
104.0 |
Ball-to-cone / ball-to-ball |
M8810-300 (UL) |
| 4″ / DN100 / 114.3mm |
113.5 |
Ball-to-cone / ball-to-ball |
M8811-300 (ISO) |
