hollow ball with hole on top you hold your finger on and squeeze as you let the air out it starts the pump. Pump was put in 1969 it is in down in the sump well so I'm not able to see a number. Good luck. Thank you
hollow ball with hole on top you hold your finger on and squeeze as you let the air out it starts the pump. Pump was put in 1969 it is in down in the sump well so I'm not able to see a number. Good luck. Thank you
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