EYS 25 Percent Fill

25%* Fill. Vertical. For Close Turning Radius.
Explosionproof, Dust-Ignitionproof, Raintight.
Unilets® for Use with Threaded Rigid Metal Conduit and IMC.


  • NEC/CEC:
    – Class I, Division 1 and 2 Groups A, B, C, D
    – Class II, Division 1 and 2 Groups E, F, G
    –​ Class III
These Appleton sealing fittings minimize the passage of gases and vapors and prevent the passage of flames from one portion of a conduit system to another. They prevent pressure piling the within conduit system and contain any explosion that occurs. These models in the EYS Series provide a close turning radius and can be used for sealing vertical conduit runs.

EYS 25% Fill Vertical Conduit Sealing Fittings for Close Turning Radius Catalog Pages

Applications Features Catalog Numbers Related Products
  • For sealing vertical conduit
  • Prevent pressure piling within conduit system
  • Required in Class I, Division 1 and 2 locations:
  • Within 18" of enclosures containing apparatus that may cause arcs, sparks or high temperatures
  • Where 2" or larger conduit enters enclosure, fitting housing terminals, splices or taps
  • At the boundary where conduit leaves classified location
  • Where two or more enclosures are connected by 36" or less conduit (seal must be located within 18" of either enclosure)
  • Required where cables (which exceed rate of gas or vapor transmission permitted for seals) are used in Class I, Division 2 locations
* Per NEC 501.15(C)(6) seals in Class I, Division 1 and 2 must be limited to conductor fill of 25% of cross sectional area of a rigid metal conduit of the same trade size unless approved for higher percentage fill. See 40% fill sealing fittings.


EYS 25 Percent Fill Vertical Conduit Sealing Fittings for Close Turning Radius