Top seal adaptors thread onto underground and aboveground storage tank fill ports and riser pipes where tight fill connections are required.
Standard Features
- Accommodates Morrison most brands of top seal caps
- Â Straight threads with gasket secure Morrison model 419 drop tube onto the riser pipe
-  4″ available with internal lugs for easy installation
-  305H and 305LH have a higher profile
-  305L and 305LH have internal lugsÂ
Construction Details
- Brass with Buna-N gasket

![Emco Fill Adapter, Aluminum, No Lugs, 4" NPSM x 4" CAM [EVR]](https://i0.wp.com/nationalpetroleum.net/wp-content/uploads/2026/02/FillAdapter-2.png?resize=300%2C300&ssl=1)



