In a message dated 11/11/02 9:46:27 PM Eastern Standard Time, 
AVALON2455@aol.com writes:
<< .It's 
 what the shops use..........when it gets real dirty, take it to a hazardous 
 waste center........... >>
To make the cleaner ( Mineral spirits) last longer install a engine oil 
filter after the pump.  This will make the cleaner last and last.  My parts 
washer saw 10 years of day to day auto repair shop use and I had never made a 
wholesale change of the fluid.  The fluid that got carried off with parts and 
the odd quart pumped out to clean something really dirty was all I ever did.  
Filter changes were made when the flow got low.
A couple of tricks
Try to use a oil filter that does not have a anti drain back valve.  This is 
a rubber flap that can be seen through the circle of holes on the base.  ( 
This is the inlet side) These valves tend to restrict flow since the solvent 
pump is a low pressure unit.  The rubber valve can be punctured and removed 
with a screwdriver.
Use a Chrysler/Ford remote oil filter base.  There are many filters of all 
sizes that use this thread. 
Flea markets are a good source for filters, otherwise purchase a cheapo store 
brand filter.
Harold
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