Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: What is the maximum weight, or volume of water, that this unit can support?
Document: Excellent hotplate. Solid, flat surfaced, uniform heating and enough heat to boil a large pot for such things as hot water pack canning and firm enough to support your pots and pans. Not junky at all like many of the cheap ones widely available. The somewhat rough surface is excellent for keeping your pans, griddle, stock pots from sliding around. Worth the money, I think.
I had to return an 1800 watt induction hot plate and disk because it wouldn't bring my 23 qt pressure canner up to pressure. This 1500 watt unit does the trick! I love it and highly recommend it for larger size pots/canners. Just make sure you start with boiling water from the stove to make things move along faster!
The hot plate has a coated iron plate top which emits a nasty smoke when first heated, but after the first use it is odorless. I started by boiling water for tea - it brought the flat bottom tea pot to a boil fairly quickly. This was reassuring, because I had worried that the unit might be underpowered. The control knob is the usual roughly calibrated thermocouple control, with a scale from 1 to 12. The unit cycles power on and off to come to temperature, lighting the red light when power is on.
I thought the coating was some kind of enamel; no such luck.. Yes I put a wet water pot on the burner frequently, but the regular cheapo burners never rusted on me (I have since went back to the old cheapo burner)..Unit is quite large for so basic a function.. And the whole top gets very hot; I think a poor design. After the water boils (or oddly even gets close to boiling), and I turn off the knob, it then proceeds to a rolling boil for quite a long time..
The one I bought was made in Germany, and says "cadco" on the label.. I believe its common knowledge that the ones that look exactly the same "are" the same (and some company slaps on a label).. No I cant say for sure, but this is the way to bet..My use is to heat water in a teapot. At first I kind of liked it, but in retrospect I would have liked "any" burner of this basic type..After about 2 years, there is still a chemical smell from the unit (which I dislike very much because I have freed myself from as much plastic and non stick pans as I could; now I am forced to breathe in this mysterious stuff every time I use it)..Burner rusted in a couple spots..
I just love it and it holds up under the weight of my five gallon pot!Easy to control the temp.This is the one to get - hands down.
With a slight modification that is easily reversible to keep the range from cycling on and off, I was able to heat the same 5 gallons in around 60 minutes.I'm not sure what the maximum amount this little heater could heat up but doubt it would heat up more then 6~7 gallons safely.
On the positive side, the burner heated up very quickly, cooked quickly, and was like a regular stove-top burner in many ways.Two negatives:-  It took a very long time to cool down, over an hour.-  It is very heavyIf you're using this in your home, those two negatives might not detract at all. But we wanted it for travel. It would add substantially to the weight of our luggage, and we couldn't use it for breakfast because it would be too hot to pack up.
I actually called Cadco to complain & I really gave the tech support guy a hard time about it.This weekend I tried the burner with my new Presto 01781 23-Quart Pressure Canner and Cooker. It actually worked like a charm! The Cadco PCR-1S was able to heat it to 15 lbs of pressure very quickly.I also took it camping & it of course worked very well.
I have a glass top stove and I do a lot of canning. I have been concerned because of the warning of using a canner on a glass top. I also lack space to  work with my canner on the stove. This works like a charm. With this on the counter beside my stove I had plenty of room to work. The Cadco heated very quickly and the weight of the canner was not a problem. As someone else said it is a little hard to adjust the heat but I think with time I will learn.
Answer: I don't know for sure.  I use an All American 930 with 14 quarts of food in it.  I cannot pick it up. I would estimate that to be in excess of 50 pounds, but I do not know if the manufacturer has rated it for a weight load. All I can say it that I find its design very stable and well designed.  I would post a photo for you if I knew how.  There is no overhang with my 930.