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T&T: Nettle resistant hull strainers

From: Frank Burrows (no email)
Date: Mon Aug 01 2005 - 20:42:02 EDT

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    After 25 years of boating on the Chesapeake I think I have finally come up
    with an inexpensive way to keep the sea nettles on the outside of the boat.
    The worst place in the Chesapeake use to be and probably still is Carters
    Creek off the Rappahannock river. That is where I saw my first 5 gallon
    bucket with a hundred 1/4" holes with a submersible pump powering an AC
    system. The theory behind these buckets is that the amount of suction at
    any individual hole is so minimal that the nettles will not get sucked in
    and the holes are small enough that they can't fit if for some reason they
    want to go into your bilge. I recently had to break out mine when my 25
    year old Marsh pump died. They are a great inexpensive back up if you want
    to insure that you always have AC in the heaviest nettle areas.

    Lots of my friends and I have applied this same concept to the external
    bronze strainers that cover the through hulls. The idea is that bigger is
    better. If you can provide a larger area for the inlet then the nettles are
    going to be less likely to be sucked in. The big wedges work great for AC
    units and if you drill a few extra holes in the sides and back this
    increases the area even more. You are not supposed to use a wedge with a
    generator so the big round ones are also useful. I would pick these up so
    the next time you pull the boat you can swap them out.

    Remember the whole theory is to increase the surface area to reduce the
    amount of suction. I have been using these for 10 years with no nettles in
    the AC or Generator.

    Frank Burrows Destiny 1979 43' Viking MY
          Piney Narrows Chesapeake Bay
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