I own a Hoover Steam

Question

I own a Hoover Steam Vac V2 deep cleaner with Auto Rinse feature. The Model Number is not available ex: was on the bottom of the machine and the sticker is completely worn off the machine. I am having a problem with the bottle you fill with detergent ex: this bottle is seperate from the main clean water tank. THE PROBLEM: The little plastic part that goes in the bottom of the bottle has an "O" ring ex: cone shaped with a spring.....it keeps falling out.Can you supply a part number for this component? The bottle has a number ex:36778-002. Thanks...Linda [phone].e-mail address: [e-mail]