Abstract: A sewage tank for use with a pump such as a grinder pump to convey sewage. The sewage tank includes a container comprising a sidewall, and a plurality of members connectable and attachable around an outer surface of the sidewall of the container operable for use in providing additional ballast under high ground water conditions.

Abstract: A sewage tank for use with a pump such as a grinder pump to convey sewage. The sewage tank includes a container having an upper portion and a lower tapering portion defining a chamber for containing the pump. The lower tapering portion has a reduced size compared to the upper portion. The upper portion and the lower portion may include a plurality of intersecting vertical ribs and horizontal ribs defining a plurality of recessed pockets. The lower portion of the sewage tank may also include an outwardly-extending flange sufficiently sized so that soil may be backfilled around the bottom of the tank to prevent the tank from floating upward out of the ground due to its buoyancy under high ground water conditions. A sewage tank having a stepped flange is also disclosed.

Abstract: A cutting wheel for a grinder pump includes in one embodiment a monolithic disc-shaped base portion having a bottom surface having a plurality of integrally formed spaced-apart, downwardly-depending cutting elements disposed adjacent the peripheral edge of the disc-shaped based portion. In another embodiment, a cutting wheel for a grinder pump includes a monolithic disc-shaped base portion having a bottom surface having a plurality of integrally formed spaced-apart, downwardly-depending cutting elements disposed adjacent the peripheral edge of the disc-shaped based portion, and a plurality of integrally formed downwardly-depending paddle elements spaced-apart from the cutting elements.

Abstract: A sewage tank for use with a pump such as a grinder pump to convey sewage. The sewage tank includes a container having an upper portion and a lower tapering portion defining a chamber for containing the pump. The lower tapering portion has a reduced size compared to the upper portion. The upper portion and the lower portion may include a plurality of intersecting vertical ribs and horizontal ribs defining a plurality of recessed pockets. The lower portion of the sewage tank may also include an outwardly-extending flange sufficiently sized so that soil may be backfilled around the bottom of the tank to prevent the tank from floating upward out of the ground due to its buoyancy under high ground water conditions. The sewage tank may also include a stepped flange.

Abstract: A cutting wheel for a grinder pump includes in one embodiment a monolithic disc-shaped base portion having a bottom surface having a plurality of integrally formed spaced-apart, downwardly-depending cutting elements disposed adjacent the peripheral edge of the disc-shaped based portion. In another embodiment, a cutting wheel for a grinder pump includes a monolithic disc-shaped base portion having a bottom surface having a plurality of integrally formed spaced-apart, downwardly-depending cutting elements disposed adjacent the peripheral edge of the disc-shaped based portion, and a plurality of integrally formed downwardly-depending paddle elements spaced-apart from the cutting elements.

Abstract: A sewage tank for use with a pump such as a grinder pump to convey sewage. The sewage tank includes a container having an upper portion and a lower tapering portion defining a chamber for containing the pump. The lower tapering portion has a reduced size compared to the upper portion. The upper portion and the lower portion may include a plurality of intersecting vertical ribs and horizontal ribs defining a plurality of recessed pockets. The lower portion of the sewage tank may also include an outwardly-extending flange sufficiently sized so that soil may be backfilled around the bottom of the tank to prevent the tank from floating upward out of the ground due to its buoyancy under high ground water conditions. A sewage tank having a stepped flange is also disclosed.

Abstract: A sewage tank for use with a pump such as a grinder pump to convey sewage. The sewage tank includes a container having an upper portion and a lower tapering portion defining a chamber for containing the pump. The lower tapering portion has a reduced size compared to the upper portion. The upper portion and the lower portion may include a plurality of intersecting vertical ribs and horizontal ribs defining a plurality of recessed pockets. The lower portion of the sewage tank may also include an outwardly-extending flange sufficiently sized so that soil may be backfilled around the bottom of the tank to prevent the tank from floating upward out of the ground due to its buoyancy under high ground water conditions. A sewage tank having a stepped flange is also disclosed.