I asked that same question of the Toto Customer Service person (1-piece vs. 2-piece) and she said the only difference was personal preference. I was comparing the Guinevere 1-pc to the Carrollton 2-pc -- both are skirted but only the Guinevere is ADA height. So for me it will be the Guinevere which also has the SaniGlos finish and cyclone flush. One word of caution though, check the specifications to make sure your water inlet valve is in the correct place on the wall -- not all Toto toilets take the same placement, and they are definetly different than your plumber is used to doing.

Enduring , I think that when your whole bathroom will be done you will completely forget about the slant of the toilet . Your eyes will be drawn by your floor , shower , soapstone sink ....etc, etc. I realized that as we choose each item we concentrate a lot on its details , but when you put all the items together , these details will fade away and you will completely forget about them . When I was painting my kitchen I fussed over any scratch or small dent here and there . Now I don't even look at the wall there . Save your energy for the bigger details , I am sure you will love it, I personally like it a lot . Miruca,as I can see from your posts that you are just starting your selections process . We have all gone through this , you are overwhelmed with the choices, and there is always something better . I just try to get what I like in the best quality possible , for the lowest price possible . My DH complains that I have an expensive taste and that I have to have the best . I agree with that , but I do my homework by shopping around for good deals (it involves spending a long time on my iPad ) . Good luck with you selections . Keep us posted .

We purchased this Toto Promenade two months ago, to use in our 1960's bathroom (small, with the original tile.) We wanted a vintage look, and with the round bowl, this model is only a bit over 26" deep, which gave us a few precious inches of more knee room (our tiny bath is only 46" wide!) This was our first Toto and replaced the original 1964 American Standard toilet. We wondered if our 60's plumbing would cause any problems with the new toilet, but it has worked flawlessly. We installed it ourselves and it was simple. Although the water area is much smaller than the old American Standard toilet, the bowl empties cleanly in one flush. We liked the tall, skinny tank since it was exactly the same height as the little farmhouse sink vanity we installed, and the seat is a comfortable 17.25 inches tall. We purchased it online from National Builder Supply and they shipped promptly, it was very well cushioned in the two boxes it shipped in. So far, we're very happy with it, and wouldn't hesitate to order another Toto.

The website below is the City of Austin's (TX) green building program rainwater collection information. Rainwater catchment systems are very popular in Austin and the surrounding areas and in some hill country locations rainwater is the ONLY source of house water. In our current house, we have a 1200 gallon tank that catches the rainwater off a modest 1100 sq. ft. roof and it easily fills up with a couple of inches of heavy rainfalls. My husband installed it himself with lots of buried underground PVC pipe, an old galvanized metal tank, and a Ditch Witch rental. With a small pump and solar panel trickle charging a 12V battery, it works great for irrigating the garden and fruit trees. Since that was successful, we decided to put in another catchment system in the house we are in the process of remodeling prior to moving in. At this house, however, we are using a catchment system for our house water and that added another layer of complexity for various reasons; size of house, number of downspouts, length of underground PVC, gutter and downspout screening, size of tanks (2 x 3000 gal.), multiple sediment filters plus a UV light for sterilization purposes, shed to house about equipment, etc. (You won't need a UV filter if the water isn't for potable uses.) Remember that for both these systems, you absolutely need a "first flush" mini-catchment system to divert the first water off your roof BEFORE it enters your main tank/cistern. The first rain will wash your roof of all the dust, bird droppings, leaves, and other detritus and you absolutely want to keep out of your main cistern because entering a cistern through a tiny manhole opening to clean out sediment is no fun. Therefore, you want to make sure to catch that first roof "flush" in a separate, smaller tank (that you empty or clean periodically) and not allow it to go into your cistern(s). There are various kits or plans for these types of "roof washers" or "first flush containment" systems available with different diverter options. Usually they use a ball valve that rises with the water in the smaller cleanout tank that will allow the subsequent rainwater to flow into your cistern. Some cleanout traps/tanks have a valve that slowly allow the first flush water to leak out in readiness for the next rainfall, but you still must plan on physically cleaning out the debris from the first flush tanks periodically. I can say that it is truly amazing the amount of rainwater one can gain from a catchment system. I believe it is possible, theoretically, to catch about 600 gallons per inch of rain for every 1000 s.f. of roof. I say theoretically because there will always be inefficiences in the system, still, it is quite amazing to go out during a rainstorm and watch the waterfall of rain flowing into your cistern (need a flashlight and a ladder, we have above-ground tanks). By the way, your cistern does not have to be immediately adjacent to your building. You can run pipe (above or below ground) to it from your downspout collection point(s) and as long as the opening into the cistern is LOWER than your gutters, it will fill up.