Retired and happy
Join Date: Sep 2008
Location: Calvert County, MD
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To answer the question, it won't do the pump any harm since it is a flexible diaphragm type and therefore requires no lubrication.
However, I agree with others about sorting the source of the problem.
Leith (rhymes with teeth) is the port of the City of Edinburgh in Scotland. A Leither is someone who comes from that area.
I must go down to the sea again, to the lonely sea and the sky - I left my shoes and socks there, I wonder if they're dry?