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5 Year Warranty
FIG_256B_Pipe_Interrupter_Nabic_RedBG_v1.jpg FIG_256B_Pipe_Interrupter_Nabic_RedBG_v2.jpg FIG_256B_Pipe_Interrupter_Nabic_RedBG_v3.jpg

Fig 256B Pipe Interrupter

5 Year Warranty

NABIC Fig 256B pipe interrupter is classified as a type DB device suitable for protecting up to fluid category 4.

This device has a moving element which seals the ventilation gaps during normal flow conditions. When negative pressures occur on the inlet side which could cause siphonage, the membrane retracts seals the flow ports and simultaneously vents the outlet side of the pipe interrupter.

  • WRAS approval to be used on all potable water applications
  • O Rings EPDM
  • In compliance with: BS EN1717 & BS EN 806-5
Product Features +

Medium: Water

Size Range: DN10 - DN20

Pressure: 0.5 to 10 bar

Material: Chrome Plated Brass

Temperature: -20 to 60°C

Connection: Male inlet and outlet

Pipe Connections

Male BSP inlet and outlet connections: G3/8", G1/2" and G3/4" to ISO228A. DN15 and DN20 female connections G1/2" and G3/4" to ISO228


All valves are 100% production tested.

Product Extras

  • Female inlet connection available on DN15 and 20


1 Body Material Brass
2 Internals Plastic
3 Membrane EPDM


Dimensional Drawings

Dimensions & Weights

L D Kv
10M 3/8" 89 29 0.26
15M 1/2" 89 29 0.26
20M 3/4" 90 29 0.61
15F 1/2" 82 29 0.26
20F 3/4" 68 29 0.61


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