Should I remove the plate behind the black mixer cup?

The top screw (encircled in blue) is stripped. Before I go in there with drill bits and screw extractors and ATTEMPT to remvoe the broken off screw, I was wondering if I could easily remove the black mixer cup and the plate behind it (encircled in red). Removing this plate would give me better access to the screw. And if in fact, the plate can be easily removed by unscrewing the two large screws, do I need to shut the water off prior to doing this? I am just a home owner DIY'ing, with limited plumbing knowledge, so any pointers would help. Thanks! Note: The screw was stripped by the previous home owner

I can’t tell if it’s water is coming in from the wall or a tank/softener.

Any suggestions on how to tell?

CPVC threaded fitting failure - how did this happen. 30-50 psi loop in solar hot water system. CPVC threaded into Cu. Just burst all of a sudden. Good I was home; river coming through the ceiling fixtures. Replaced with SharkBite. Other thoughts?

Any advice on how to get out these horribly rusted screws?

I sprayed WD40 on it and tried to get them out with no luck. Maybe I need to call a professional.

Any advice on how to get out these horribly rusted screws?

I sprayed WD40 on it and tried to get them out with no luck. Maybe I need to call a professional.

We’ve been without water for a couple days due to it being a holiday weekend when this started leaking. What kind of financial damage are we looking at for something this small and easy to access?

2 handle shower valve with set screw from inside fell off. How to remove

You can see the screw on the inside but the backside of this shows no way to get to a set screw. Any ideas ?

Submersible sewage pump, fall on send pipe?

Does the Send line to the septic tank need fall like normal plumbing? I'm wondering if I can get away with running with minimal fall because it's pumping and not relying on gravity. I'm in Ontario, Canada.

Washer drain suddenly overflowing ? Help!

Why would my washer drain suddenly start overflowing at the drain pipe. we checked the drain pipe and p-trap with an auger and nothing came up. It’s been working fine for over a year and now within a few seconds of it doing the drain cycle, it overflows and I have to stop the washer.

Delta RP70878 or RP72472 3" flush flapper help

"CoPPeR LaStS fOrEveR"

Just an example of what copper looks like when a pinhole develops at a joint. This sucker decided to fail in the middle of the night, and by complete coincidence I found it at 130am as I was putting one of the dogs up for the night. Completely flooded under brand new laminate.