Is there a filter screen to protect my submersible pump from algae or debris when pumping from a lake?

Yes, there are premade pump savers, or you can build a screen from common water well accessories. There is an article on how to build a pump saver in the additional resources section below which will be helpful.

The submersible pump is installed inside the 4” slotted well screen which has the ends sealed to ensure the water is filtered through the slots. The large screen area allows for a high volume of water to enter the well screen at a much lower velocity than when filtered through the small intake screen provided on the submersible pump itself. The lower velocity reduces the algae or debris that is drawn onto the surface of the screen.

It is best practice to purchase or build a pump stand to keep the pump off the lake bottom. Marking the location of the pump with a buoy is always a good idea.

Submersible pumps are typically designed for vertical installation, but many can be installed at a 45-degree angle to prevent damage to the thrust bearings. Always verify with the pump manufacturer regarding horizontal installation or minimum angle requirements.

Failure to follow the manufacturer’s installation requirements could void the pumps warranty.

Additional Resources:

https://support.boshart.com/what-is-a-pump-saver-and-how-does-it-work

https://support.boshart.com/how-to-build-a-submersible-pump-saver

https://support.boshart.com/2021-canadian-electrical-code-changes-regarding-pump-cable-for-submersible-pump-installation-in-deep-well-and-bodies-of-water

Pump Stand Examples: