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Series 4000 Plumbing Fittings

Conex Series 4000 capillary fittings are available in sizes 6-54mm and are suitable for connecting copper tubes in accordance with EN 1057 (formerly BS 2871: Part 1) and many other standards including ISO 274.

Series 4000 fittings are primarily designed for solder applications but, with the exception of Union fittings with copper tails, may also be brazed. For sizes above 54mm please refer to the section on Conex Series 5000.

Most fittings in the range are manufactured from Copper or Gunmetal thereby being immune to dezincification.

Hydraulic working temperatures and pressures based on EN 1254-1 are shown below:

Conex Series 4000 fittings - Soldered

Conex Series 4000 fittings - Soldered
Size (mm)Working Pressure (Bar)
0°C to 30°C65°C95°C110°C
6 - 54 25 25 19 16

Maximum Working Temperatures and Pressures

Conex Series 4000 fittings (Silver brazing)
Size (mm)Working Pressure (Bar)
-20°C to 110°C150°C200°C
6 79.1 67.3 35.6
8 57.9 49.2 26.1
10 45.7 38.8 20.5
12 37.7 32.0 17.0
15 35.1 29.8 15.8
18 33.3 28.3 15.0
22 30.6 26.0 13.8
28 23.8 20.3 10.7
35 21.1 17.9 9.5
42 19.3 16.4 8.7
54 16.3 13.9 7.3

Maximum Working Temperatures and Pressures for Water/Glycol Applications