After 18 months of searching I've found a replacement for the Kempax K504/5
pump made by
Raritan.
The valves on mine had
lost their flexibility and I couldn't find any to match and the exposed cover was brittle and ugly.
I found it after seeing a catalogue shot that looked similar. An
email to SPX
Sweden resulted in an
email from the Customer
Service Manager in Illinois that gave me the new model number of the old Kempax.
The Canadian distributor had no stock and I didn't want to wait 10-12 weeks so I found 1 in stock at
Pump Vendor. They shipped quickly and now I have a Johnson 70-50005 Viking pump.
The only differences are longer inlet/outlet tubes for better clamping and black coloured plastic
parts. Replacement
parts are also available.