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Grey Water Systems

Grey Water Systems

Home > Drainage > Grey Water Systems

Grey Water Systems

What are grey water systems?

Grey water systems are also called grey water pump stations. It is a collection tank for grey water with a submersible vortex pump. Grey water collects to an underground pump station (collection tank). When the water level in the tank rises, the pump automatically turns on by way of the vertical float switch. It pumps the water out via the discharge outlet in the tank wall to wherever you want the grey water to go, such as the septic system, rhelm drain, or sewage line (even if that point is uphill from the tank).

What is grey water?

The relatively clean waste water from baths, sinks, washing machines, and other kitchen appliances. Grey water is not to be confused with ‘Black Water’ which is waste water from toilets.

What does a grey water pump station consist of?

Strongman Pumps supplies REEFE® Greywater Pump Stations. These systems are available in 3 pit / tank sizes.  They are a pre-packaged single pump system with a solid poly lid. Pre-assembled with superior 100% Taiwan manufactured REEFE® vortex pumps for domestic and commercial pumping systems.

Easy Installation

REEFE® grey water stations are delivered pre-plumbed, wired and ready to install as a plug & play system.  Installation instruction are included with every system.

Why would you use a grey water Pit?

Our pump station kits are ideal for:

  • Pumping grey water
  • Undersink pump-out-systems
  • Building sites and other temporary applications
  • Screened wastewater removal

All tanks are manufactured from Polyethylene and have a long life span. The tank pipe inlet is to be installed on site.  The tank pipe outlet size is 40mm for the 40L & 85L tank and the 180L.


Pit and grate sizes and dimensions:

  • 40 Litre – Grate size is 300mm sq. Pit is 450mm deep.
  • 85 Litre – Grate size is 450mm sq. Pit is 510mm deep.
  • 180 Litre – Grate size is 600mm sq. Pit is 600mm deep.

Which pumps are included?

Quality Range of REEFE® 240V Vortex pump models available with our systems.

In the 40L, 85L & 180L systems displayed above, we are using the RVS155-VF (has a vertical float switch).
RVS155-VF – Maximum flow is 155LPM – Maximum head is 7m

If you would like a pump that will produce a larger flow at a higher head, then the following pumps can be installed in your system instead of the RVS155-VF.  If you are interested in one of these systems, please contact me and I can arrange this for you.

Choosing a pump pit can be a challenge. Thats why Reefe Pumps have created an easy selection sheet to make selection easier. REEFE_PUMPS_EASY_SUMP_PUMP_SELECTION_GUIDE

All 3 pits are available with larger pump options (RVS250-VF, RVC260 and RVC315 – High Head Applications)

  • RVS250-VF – Maximum flow is 235LPM – Maximum head is 10.5m
  • RVC260 – Maximum flow is 280LPM – Maximum head is 10.5m
  • RVC315 – Maximum flow is 330LPM – Maximum head is 11m

grey water pump systems

For pit details, see here: Poly Storm Water Pits

Popular Q & A’s

Q:  What is the distance from the top of the pit to the bottom of the outlet pipe?

A:  The bottom of the inlet is typically 180mm below the level of the grate or lid. This does vary marginally per pit.


Q:  How do I install the electric cable for easy removal of pump from pit if needed?

A: The cable goes through the pit wall via a cable gland and we recommend running the cable through a 50mm conduit to allow for easy removal of the pump.


Q: Is it plug and Play or hardwired?

A: The pump comes with 10m of cable and has a plug end.  Depending on the distance between the pit location and the power supply, the plug end may need to be removed and the cable joined to enough cable to reach the power supply.  It is recommended the cable be fed through 50mm conduit.  This must be done by a qualified electrician.  The correct size cable needs to be selected depending on the distance.


Q: Is there a breather hole?

A: Yes.  In the discharge elbow.


Q: is there a non-return valve?

A: Yes. The non return valve is a swing check type.  It is mounted in the horizontal discharge line.


Q: What is the inlet pipe size?

A: The inlet size is typically 100mm, however the inlet must be installed by the installer.


Q: Is there a vent in the pit?

A: The pit does not have a vent as it is typically an already vented system feeding into the pit. If a vent is required the most common way to do it is shown int the below sketch.

grey water pit vent

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Submersible bore pump at an excellent price and don’t be put off by the distance away as freight service was very prompt and included in the overall price. My first call or email will be to Marion when I need another pump. Highly recommend Strongman pumps.
Jeff, Thangool QLD

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