Hi..thank you in advance for reviewing this problem. my moen one piece faucet in sink is 'moving'...i looked under the sink and it appears that there is a big metal 'holder' for all the copper and hoses..can't see the bolt. i would venture to say that the systems o rings under the faucet base have 'shrunk' with hard water and pressure. is this system held tight with o ring and gravity? i am somewhat handy and realize that disconnecting hoses and copper tubes will be required but want to get some supplies in before just 'taking down the system'. this is third unit in 9 years for the sink - so don't want to spend for plummer, etc. - they talk my husband into hundreds for all new fixtures and its not something we should be spending on...thanks again!

 

Click link below, it will show how faucet connects to bottom of sink, there is a nut that will keep it tight to bottom, you need to tighten it down. Everything above should not have to be touched, all work will be done under the sink.

Moen Faucet Breakdown