Tight-Fill Top-Seal Adaptors are installed in spill containment manholes on the fill riser pipe from an underground fuel storage tank. They mate with the gravity drop delivery elbow on the transport truck.
OPW 633T Top-Seal Adaptors thread onto the fill pipe of underground storage tanks, and are designed to mate with top seal delivery elbows. Use OPW 634TT, 634TE or 634TTP Top Seal Caps with 633T Adaptors.
- Easy Installation – Integral internal wrenching lugs are provided for installing in the confined space of spill containers.
- Manufactured from Durable, Corrosion-Resistant Materials – Bronze, hardcoat aluminum and composite Duratuff®.
- Accommodate 633LC Lock Clamp – 4 x 4" 633T (E) models incorporate dual notches in the base to accept 633LC Clamps