Through hulls

Discussion in 'Metal Boat Building' started by spaceboy, Feb 25, 2018.

  1. spaceboy
    Joined: May 2013
    Posts: 25
    Likes: 0, Points: 1, Legacy Rep: 10
    Location: nw uk

    spaceboy Junior Member

    I have a steel boat which has steel standpipes and flanges welded to backing plates below waterline. On the exterior of the hull the standpipe is flush with the hull and does not seem to be welded on the outside. There is a ring of threaded holes about 8mm dia which penetrate the hull around the outlet. The diameter of the ring is about 100mm. Can anyone tell me what these tappings are supposed to retain?. Are they for strainers.
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