Cleaning Sea Strainers

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Boats with raw water pumps will be accompanied by sea strainers, which are used to filter foreign objects and debris from their respective systems. It should be part of your basic maintenance schedule to check your strainers and remove any build up. Fortunately, this is a very easy task and shouldn’t take more than a few minutes.

What you will need:

  • Specialty tool to open sea strainer
  • Water Hose
  • Detail Brush

How to do it:

  • First, turn off any systems associated with the sea strainer you are about to work on (AC, Generator, etc) because you will be cutting off the water supply. If you run these systems without water, severe damage may occur.
  • Shut the seacock off, otherwise water will pour out of the sea strainer once opened.
  • Open the sea strainer with your speciality tool. Reach inside to grab the basket. This is the mesh cylinder inside the sea strainer itself.
  • Flush the debris out of the basket with water and scrub with a Wire Brush. Ensure no debris remains.SeaStrainerBrush
  • Check the O-ring. Look for scratches or tears. If damaged, replace the part.
  • Use the hose to flush out the sea strainer housing. Fill it to the top with high pressure to blast out any small particles
    Once clean, place the basket back in its housing. Be sure it’s set properly.
  • Close up the sea strainer, open the sea cock, and check the system by running the associated machines. Check for leaks. If none are present, your done!

Happy Cleaning!