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Your toilet is always there for you. If you haven’t, you could be in for some heartbreak when things start to go wrong: running water, a flush handle that doesn’t work, even “ghost” flushes.
If water is poured slowly into the bowl it simply flows over the rim of the waterway and pours slowly down the drain—thus the toilet does not flush properly. After flushing, the flapper valve in the water tank closes or the flush valve shuts; water lines and valves connected to the water supply refill the toilet tank and bowl.
The visible water surface in a toilet is the top of the trap's water seal. Each fixture drain, with exceptions, must be vented so that negative air pressure in the drain cannot siphon the trap dry, to prevent positive air pressure in the sewer from forcing gases past the water seal, and to prevent explosive sewer gas buildup.
The mechanism of a flushing trough: pulling the flush chain (1) rocks the flush lever (2) and lifts the siphon plate (3), forcing water over the top of the siphon (4) and starting the flush. Water is sucked through a connecting pipe (5) from the timing box (6) and air enters the timing bottle through the vent pipe (7) until the box is empty and ...
Because the water is gradually shut off, slower water at the end of the cycle that will not activate the siphon serves to refill the bowl. The valve cannot be kept open by holding the flush lever in the activated position, wasting water, because this only sends the main cylinder valve all the way up to its topmost shut off position.
Air lock problems often occur when one is trying to recommission a system after it has been deliberately (for servicing) or accidentally emptied. Take, for example, a central heating system using a circulating pump to pump water through radiators. When filling such a system, air is trapped in the radiators. This air has to be vented using screw ...