Part identification please?

Delta faucet leak

My Delta kitchen faucet is leaking, I’m 99% sure it just needs a rubber washer but I can’t figure out how to get to it. Any ideas or suggestions?

What is this fitting and can I remove it myself?

Trying to replace a leaky tub spout. After getting the old spout off, this is what's left, which doesn't seem to be compatible with a new tub spout. Do I remove this fitting? How do I proceed?

Cistern coming off wall

I’ve just had a new bathroom fitted this week and they have left a gap at the back, is this ok or should I call them to come back and fix it?

Does this look okay???

Had to use the resizing seals on the wall.

"We have a gas leak on our water heater"

"the last guy said the screw was stripped" It was broken off inside the water heater.

How do I remove this old kitchen faucet Mount?

Is this a console sink?

I bought this vintage sink on craigslist. The guy told me it’s a vanity top but I think it’s supposed to have legs. I can’t find any underside photos of console sinks online, so I came to the experts.

Any idea why the dirty water gets backed into my dishwasher

I do notice my dishwasher outlet is going into the garbage disposal. I am assuming when water accumulate in the garbage disposal is flowing back into dishwasher. I have to run the dishwasher and cancel the cycle so it drains this dirty water from dishwasher. Plus the water smells horrible. Is my dishwasher faulty or the dishwasher outlet should be going into the other drain from the sink??

Attached a new sink to existing pipes

Glycol Valves are showing these blue tinges. How do we fix it?

I think it’s glycol