In certain circumstances, depending on your proposed set-up, a non-return valve should be fitted after the pump.
This is to prevent water siphoning back from the pond when the waste valve is in an open position.
Order a 1½” non-return valve from Evolution Aqua quoting part number: K25-50-100
In order to maintain the water level in the filter, the PUMP-FED installation requires the non-return valve provided to
be fitted after the pump and before the filter.
The non-return valve is to prevent water going back to the pond.
Please ensure the non-return valve is fitted in the correct direction, with the arrow on the non-return valve pointing
towards the filter and not the pump.
We recommend that the pond pump is raised off the bottom of the pond as per the Nexus filter installation
instructions. This will prevent the pond from emptying completely in the event of pump failure.
You may require the additional parts:
- 1½” hosetail - EA CODE: HOSETAIL15
- Reducing sleeve 1½” TO 40mm - EA CODE: M35-0-50
NON-RETURN VALVE ON GRAVITY FED INSTALLATIONS
NON-RETURN VALVE ON PUMP FED INSTALLATIONS
POND PUMP ON PUMP FED INSTALLATIONS
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