Someone hooked up the hot water supply to the toilet instead of the cold water supply- or your water heater is back drawing hot water through to the toilet from a cold water inlet (supply)
if you have water to the rest of the house and its the toilets only then either someone has turned off the valves under the toilets or the fill valves have both failed at the same time. [not very likely!!] cant be much of anything else.
Homes are residential and take less of a pounding compared to the constant use of commercial toilets in office buildings. Commercial toilets are built way stronger and usually have to be sized according to handicap rules in the city where they are installed. They also take a 1" water supply compared to a 1/2" supply for a house toilet.
Australia used Centurion tanks purchased from Great Britain during the Vietnam War.
Not any more. In the far past, you simply went over the side. Then toilets were put in and they flushed into the sea. Now they flush into holding tanks. Many ships have specialized systems that dry things out and burns the waste. Others have bacteria, like a septic tank, that process the waste. Others pump the tanks in port into the sewage systems.
Everything from the toilets goes into holding tanks under the toilet and get emptied by special trucks each time the aircraft lands.
Usually, but only a very minimal amount of water or solution. The holding tanks have limits on what they can hold before spilling over.
The contents of the toilets in an airplane are stored in tanks until the airplane lands and are then extracted into tankers. These then dispose of the contents into the sewage systems at the airports.
Remote control tanks for kids can be purchased at large toy stores. A great place to get remote control tanks is a hobby store. A hobby store will also carry supplies for remote control tanks.
Gravity can 'bring' water down into the house.
No, waste flushed down aircraft lavatories are stored in holding tanks in the plane's lower hold. It is then emptied by trucks at the destination.
Turtle tanks can be purchased from Pets At Home and local independant pet stores. They are also available to purchase online from sites such as eBay and Amazon.
Plastic water tanks can be purchased online at Tank Depot, Premier Plastics, and Blaze Plastics. if you are worried about shipping, there are plastic tanks sold locally via Kijiji, though you may want to check if the tanks are used or sold before buying.