A block in the drain to the sump diverts rain or other unwanted water from the sump.
Permanent link to this item
https://paperspast.natlib.govt.nz/periodicals/NZJAG19410815.2.26.4
Bibliographic details
New Zealand Journal of Agriculture, Volume 63, Issue 2, 15 August 1941, Page 106
Word Count
17A block in the drain to the sump diverts rain or other unwanted water from the sump. New Zealand Journal of Agriculture, Volume 63, Issue 2, 15 August 1941, Page 106
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