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Just be carefull when you're removing the old bolts. You may need to remove some of the tile in order to get them out of the slots if the slots are the side ones versus the long adjustable slots. Use brass bolts and a jumbo wax ring to go back in.. make sure the toilet and the flange are 100%...

The shower hose is this item. It should be replaced. And if you don't like the looks of the kit, replace the entire bar, hose and wall elbow kit. The green spots are corrosion from the brass body of the valve. Typically found in highly corrosive environments. But perhaps the chrome plating...

That bathroom can be a single horizontal wet vented system too. Up and over to the toilet, branch off the horizontal for the shower, then another branch to the sink and up through the roof with the vent. Done. About 10 fittings in the bathroom.

Your minimum required drain is 3", so 3" out the roof is the minimum.

Also, if that was a toilet room, then likely there was or is a sink in that room as well? Is it still installed or has it been removed? Is it capped off properly?

I think that is likely the valve opening that creates the flush. Again, not familiar with that brand but the Neorest that its modeled after has some mechanical valves that open to create the flush and they do make some noise as the pressure is released.

The thing about the venting 3" is that the area of your vent through the roof needs to match the required building drain size. That can be achieved by connecting 3" contiguously through the building. But some times due to structural conditions you can't take 3" up.. so you then need to combine...

It doesn't look properly sealed to me. A toilet flange should be flat. The black plastic looks like something someone placed inside of a 4" flange and then stuck the plug inside of that. If it wiggles or moves at all then its not sealed. I've never used this product, but looks like it should...

The best way to share a video is to post it to Youtube and share a link to the video. Are these bathroom fixtures installed in or near a swimming pool or close to the ocean / salt water? The chrome plating has failed and the underlying metal is corroding due to exposure to a corrosive agent...

Keeping the pump running the longest period is best. So a float that is situated higher helps that.

Lets simplify this a little bit. Not sure if your toilet was a wall mount or floor mount, but essentially the same. Wet vent the sink off the toilet vertical vent. Run your 3" vent whichever is easier via the tub or behind the toilet... or a combination of two 2" and one 1.5"

Yes. A few manufacturers make them. The one we install the most is Moen Flo. It detects abnormal flow patterns, sends you an alert and shuts the water off. We also install a lot of Floodstops which are single point of use units (they can be daisy chained) on water heaters and clothe washers...

Why are you testing old existing work with water? Theres a LOT of places you could have a leak and never see it under the slab. Yes, you will need to plug the other closet flange too. Make sure to get your test balloons down past the lead or you could expand the lead under the slab.. You...

Does it thump when the pump starts? Or when the pump shuts down? Water hammer occurs when the water momentum stops due to a fast closing valve.

Toto Neorest units use a pump for flushing too. They store a small amount of water and then use a pump to push it down the bowl. They have to do it in order to keep the fresh water separated from the poopy water side. Tho the Toto also has a pull cord that you can use in case the power goes...

Seems likely that the cartridge has some side to side play in it perhaps?

Water can do really weird things when we're not looking.

Interesting.. never heard of that manufacture before. What is the water hammer arrestor for in the installation of a toilet? But here is a 1/2 MIP water hammer arrestor. Its sold by proflo, but I would bet money that its manufactured by Sioux Chief. PFXWHATD

Do you have a Link to the IRC code that is in effect in your area? Generally speaking and without understanding how the IRC views things: horizontal wet venting relies on the principle that all fixtures that are being vented by that horizontal run, enter it and remain horizontal. Other bathroom...

Do you happen to live anywhere near the shipyard? I've heard that when the navy discharges the waste from their vessels it can overflow the sewage system. Any evidence of an overflowing drain anywhere? You would typically see it in the lowest fixture like a tub or a shower. Could the moisture...