Annoying alarm!

Twice we've had a piercing alarm go off while using or draining the galley or bar sinks! We've turned off shore power, batteries and all sources of power, but alarm continues. Cant find where it's coming from, how to turn off or why its going off. All fluid levels are good. Not CO monitor or bilge. HELP!!

Sounds like it might be a bilge pump alarm. Is it possible your drains are not connected overboard and are dumping the water into the bilge? There is a forward bilge pump somewhere on the boat as well as the ones in the engine room.

Did you check the Sea Ray Systems Monitor at the helm? It will typically indicate the problem?

My bet is bilge alarm....

Thank you both! Haven't checked or knew there was a forward bilge. NO water in the stern. I turned on bilge and no water came out. Should i put some water in the aft engine region and try the bilge?
Also, we keep getting a "throttle down" alarm intermittently on both engines at around 4000 RPM. If i run at lower RPM seems to be okay. Occas will throttle down on its own. Oil if fine, gauges look good. Mechanic thinks its a sensor. Took them out and ran fine. Put 'dummy' sensors in and came on again. Awaiting his response. No mechanics on mondays. Should I take this boat to a SeaRay mechanic to go over everything? Just bought last Sept '19 and have only enjoyed without issues for a couple of months.
I am so grateful for you guys responding. Sorry i didnt get back sooner.
Be safe!!!
Dr. Dan

Oh yeah, monitors look good. Only difference is in the trim. Different on each side-even if both props down fully.
I'm new at this - forgive my ignorance.