If a grinder pump station has been installed too low into the ground -- where the lid sits directly on the grass, or slightly beneath the grass -- the station will be prone to infiltration. The vent may also be blocked, which could interfere with proper pump operation. The solution? The E/One Extender. The pre-engineered E/One Extender provides protection and meets warranty requirements for most Extreme and 2000 Series grinder pump stations.