I need a new plastic 'ring' for the external mounting of our third bilge pump. Any ideas what the correct part is and where to source. Looks like the one below.
Looks like a bulkhead fitting Henderson mk 5 pump to me, and therefore the second link that Vic has posted should do the trick. Disappointed the original plastic ring type fitting is obsolete. I fitted a new one with our lavac toilet only a few years ago. At least the internal spares are still available.