Lift pump for the washing machine

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A lifting pump is always required when wastewater accumulates below the so-called backflow level. The lift pump ensures that the waste water drains off reliably and, if properly installed, guarantees that your washing machine is reliably protected from backwater.

Wastewater treatment is a part of civilization.
Wastewater treatment is a part of civilization. © Thorben_Wengert / Pixelio

What you need:

  • Drainage pipes
  • Suitable lifting pump
  • Installation instructions

Which lift pump is the right one?

  • Basically, you have to decide whether you want to carry out major renovations for the installation or whether the pump should be set up free as part of a renovation. In the first case, the disappears Lift pump in the floor, otherwise it is free z. B. under the sink.
  • The position of the drainage in relation to the backflow level is decisive for the use of a lifting pump. In most cases, the height of this level coincides with the top of the road. To be on the safe side, ask the water supplier. You must then lead the sewer pipe in an arc above the level of the backflow level before it empties.
  • Before you buy, find out what amount of water needs to be moved and how high the delivery head is. You use these criteria to determine the pump performance. It is carried out in accordance with DIN EN 12056-4. Also note the minimum flow velocity in the sewer pipe. To avoid deposits, it must be> 0.7m / s.

Connect the washing machine

  • Usually a cutting wheel pump is used for this purpose. It is suitable for thin cables over long distances. She often disposes of all the water supply points in the at the same time bath or basement. The connection piece for the Washing machine must have at least the same diameter as the drainage hose. The hardware store offers molded parts as adapters for various cables.
  • It does not matter whether the lift pump is higher or lower than the washing machine. You just have to route the washing machine hose so that the machine does not empty itself. The lift pump switches on as required, but it must remain connected to a socket at all times.
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  • The sewer line from the lifting pump to the sewer system must be laid strictly according to the instructions. Should you suffer damage from backwater, such as flooding, and you are expecting compensation from one Insurance, the insurance company checks the proper installation of the lift pump and refuses to perform faulty construction.

How to assemble the lift pump

  1. Set up the lift pump in the intended location. In the case of underfloor installation, you should assemble the inflow and outflow connections as far as possible so that easy installation is possible. Establish the pipe connection to the sewer system. A 40 mm cable will usually be sufficient for a single family home.
  2. Now connect the washing machine to the pump in addition to other devices by connecting the drainage hose to an inlet port on the pump. If the connection does not fit, use a suitable adapter as a transition piece. Such parts are usually included with a lifting pump.
  3. Now you can connect the lift pump to the power supply. Test the function by running wastewater from any source. If the pump is completely sealed and it switches on when wastewater occurs, the installation has been successfully completed.

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