Combining sink and toilet's water pipes?
I'm a complete newbie at all this, so please bear with me. I don't know any technical terms whatsoever.
I live in a 1920s condo building where there's been a regulation to replace all tankless flushometer toilets with ones with tanks. This is because there've been a few occasions where the water's been shut off for whatever reason, and when it's turned back on, some tankless toilets have just kept running. And if the occupant's out of town... well, we've had some massive water bills.
I've done the research to find a toilet that fits my space requirements, already no easy task (pretty settled on the Toto Guinevere, if anyone's curious). Now there's the issue of how to do the plumbing. Two plumbers are suggesting two different ways, and I have no idea if they're equal.
The tricky thing is that the water input pipe for the current toilet is too high for a tank, so it will prevent the tank from being aligned parallel to the wall. My next door neighbor has the tank askew, and it looks tacky.
Option A) Move the pipe input lower. I think this is more expensive, and involves redoing the tile on the wall: breaking in the new hole and fixing up the old one. Sounds scary to me. Plus I don't know how they'd get into the wall. The access panel through my bedroom closet only seems to get to behind the shower, not to the sink or toilet.
Option B) One other unit in the building's plumber has rerouted the toilet water input so that it draws from the same pipe as the sink, which is just next to it. The new pipe would go through the side of the under-sink cabinet. The current hole in the wall would be somehow sealed off and the hidden by the tank. To someone with no plumbing experience, this sounds fine, and it's already been done and hasn't been problematic, AFAIK. But is it a cop-out? Is A the right way to do it, and is there something else I need to think about it I connect the two?
Also, the Guinevere is not an insulated tank, and I'm worried about sweating. I've read on the forums about mixer valves, and it seems like it would work well with Option B, since there's hot water to the sink already. Would a mixer valve also work with Option A? More trouble than it's worth? "Depends"? :p
So. To summarize:
- Option A or B, pros and cons, general thoughts?
- Mixer valve compatibility?
Thanks so much! This forum has been a great resource already.