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Type 3719 pH/ORP Wet-Tap Assembly

The Signet 3719 pH/ORP Wet-Tap allows installation and removal of pH or ORP electrodes without the need for process shutdown during routine electrode maintenance and calibration. Process isolation is achieved with a double O-ring seal on a unique and compact retraction assembly; no separate valve is required. A camactivated automatic locking mechanism, SafeLoc™, and the short stroke design help to assure operator safety. The wet-tap unit can be mounted at any angle and can be used with the Signet 2756-WT/WTP and 2757 WT/WTP DryLoc Wet-Tap electrode.

  • Wetted Materials: CPVC, FKM
  • Connection: 1.5 or 2 inch NPT or ISO Process Threads
  • Additional Features: Use with the 2756 & 2757 Wet-Tap series electrodes
  • Applications: Water treatment, water quality monitoring, etc.

Technical Details

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3-3719-11Wet-Tap assembly1.5 inch NPTMeasurementsCAD 159000804
3-3719-12Wet-Tap assembly1.5 inch ISOMeasurementsCAD 159000806
3-3719-21Wet-Tap assembly2 inch NPTMeasurementsCAD 159000805
3-3719-22Wet-Tap assembly2 inch ISOMeasurementsCAD 159000807


  • Large reference volume for long electrode life
  • Sealed pneumatic dampening for smooth and safe operation
  • pH electrode includes integrated temperature sensor
  • Protects electrode sensing surface from breakage
  • SafeLoc™: Camactivated automatic locking mechanism (patent pending)
  • Removes electrodes from pressurized systems for routine service or replacement
  • Space saving 45 mm (1.75 in.) short-stroke design
  • Low profile Clamp-on Saddle Fittings for convenient installation in ASTM pipe sizes 2.5 to 12 in.
  • Compatible with DryLoc Electrodes for use with 2750 pH/ORP Sensor or 2760 DryLoc pH/ORP Preamplifiers and Connectors
  • Automatic process isolation upon electrode retraction - no separate valve required

Fields of Application:
  • Effluent Monitoring
  • Water & Wastewater Treatment
  • Neutralization Systems

  • Aquatic Animal Life Support Systems
  • Sanitization Systems

  • Recreational Water Monitoring
  • Pool and Spa Control


GF Signet pH-ORP Monitoring and Control brochure.pdfPDF4.18 MBDownload
Automation Made Easy.pdfPDF5.11 MBDownload

Data Sheet – 3719 pH/ORP Wet-Tap Assembly.pdfPDF1.03 MBDownload

Instruction Manual
German Manual – 3719 Wet-Tap Assembly.pdfPDF1.66 MBDownload
English Manual – 3719 Wet-Tap Assembly.pdfPDF1.53 MBDownload
French Manual – 3719 Wet-Tap Assembly.pdfPDF1.55 MBDownload
Spanish Manual – 3719 Wet-Tap Assembly.pdfPDF1.6 MBDownload

Product Catalog
Installation Fittings and K-Factors.pdfPDF9.15 MBDownload


Georg Fischer Rohrleitungssysteme (Schweiz) AG
Amsler-Laffon-Strasse 9
8201 Schaffhausen

ch dot ps #at# georgfischer dot com
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