Model 916 PAF 406-98, 16″ Offset Manhole with Emergency Drain Plug, DOT 406 PRD

Betts PAF manhole with integral 406-98 Surge Suppression Pressure Relief Valve is the proven leader for cargo tank longevity, protection and safety.

This model has all the same features as the PPVL816 style but also offers the provision for an emergency drain plug.  The 2″ NPSM port offers a convenient area to install the emergency drain plug (3982TN).

Assembly part numbers:
  PPVL916BXB – with provision for 3982TN
  PPVL916BXB185 – with 3982TN installed

  • Other seals and manhole material are available.

Product Details

Repair Kits and Accessories

Weld Collar and Gasket options

Installation & Maintenance

PAF 406-98 Maintenance Manual

Engineering Bulletins

EB-01-18: Regulatory Instructions: Replacement of Pressure Relief Valves on MC306 Tanks.


Clamp-ring Style Manhole Installation Video #MV-PRV001