| 摘要 |
An entry fitting sealing system for an underground sump. The entry fitting includes a hub portion (56) and a flange portion (54), and a plurality of studs (46) which extend axially outwardly from the flange portion. The studs extend through apertures (58) in the sump wall (48) and through a compression ring (42) positioned in the interior of the sump. Nuts (44) engage the studs and pull the flange against the exterior of the sump wall. The exterior of the flange includes a plurality of flexible ridges (50) which provide line contact with the exterior of the sump wall and conform to the rough surface to achieve a strong seal with relatively low compressive forces. |
