The simple way is to gut the mechanical pieces including the lever arm, use a blind gasket or a sheet metal block plate at the block, and run a piece of tubing through the dummy housing. No, that won't work with a glass bowl filter unless a sheet metal plate is used between the top and bottom of the pump.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!