Small-bore wastewater pumps

Working with small bore wastewater pumps

In the first of five small bore wastewater pump training articles, Saniflo gives an introduction to the available types.

Wastewater pumps can provide alternative, innovative, efficient and cost-effective plumbing solutions in situations where access to existing gravity drainage is not possible:

Fixtures may be below the existing sewer/drainage level

A new bathroom, laundry or kitchen is being installed in the middle of an existing building, away from any current services or fixtures

Design constraints make it too difficult to access conventional drainage.

This series will review three types of small bore wastewater pumps: macerator pumps, greywater pumps and lifting stations.

1. Macerator pumps

A macerator grinds/chops organic toilet waste with blades or cutter assemblies rotating at high speed. This fine slurry is then discharged from the pump via a small-bore pipe to the nearest gravity drainage connection. A macerator pump can discharge wastewater from a full

Typical macerator pump.

Typical greywater pump.

Typical greywater lifting station.

Typical combination lifting station. bathroom—toilet, shower, vanity basin and bath, or a combination of these fixtures.

2. Greywater pumps

A greywater pump is specifically designed to take the incoming wastewater from fixtures such as a kitchen sink, dishwasher, laundry tub, washing machine, hand basin and/or shower, and discharge it through a small-bore pipe to the nearest gravity drainage connection.

3. Lifting stations

A lifting station is a larger greywater or combined black- and greywater pump with a larger diameter bore, designed for higher output performance to take the waste from multiple fixtures in demanding commercial or domestic applications. It can be installed remotely from the fixtures.

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