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Product Description

Mechanical disconnectors of this type are suitable for the protection of drinking water systems as required by EN 1717 "The technical regulation of drinking water systems". Their purpose is to protect systems against back pressure, back flow and back syphonage of non-potable water into the public water supply network. Mechanical disconnectors of this type can be used to provide protection up to and including liquid category 4 (toxic, very toxic, carcinogenic and radioactive substances). 

Technical Properties


Cold drinking water 

Liquid category (EN1717) class 4
DN size 125 mm
Port connection flanges
Mounting position horizontal
Minimum inlet pressure 1,5 bar
Nominal pressure PN10
Max. media temperature 40 oC
Flow capacity Kvs 100
Body material cast iron GG25
Body finishing powder coating
Additional Descriptions
  • Optimal protection of the drinking water supply system 
  • Enhanced protection against back pressure, back flow and back syphonage into the water supply network
  • Shut-off position visually indicated on the spring bonnet 
  • Compact construction
  • Powder coated inside and outside - Powder used is physiologically and toxicologically safe
  • All materials are KTW approved 
  • Low pressure loss
Maximum inlet pressure 10 bar
Minimum flow 60 m3/h