My parents just built a new house, but they've been having an issue where neither of the two toilet bowls is filling with enough water. I took a look at them (I know nothing about plumbing but I know how to Google) and discovered that the refill tubes weren't attached to the overflow tubes and most of the water was just filling the tanks rather than the bowls. I clipped them on and it did help, but the water level is still lower than ideal in both bowls. There seems to be a good flow coming from the refill tubes and since it's a new house I don't think there could be any blockages, there's plenty of water in the tanks (they're filled to the water level line on the overflow tubes), and plenty of water in the flush. The fill valves don't appear to be leaking and the tanks are filling at a decent rate. The only thing I can think of is that the overflow tubes aren't the right height for these tanks, but is that likely/possible? It just seems like if the overflow tubes were higher, there would be more time to refill the bowls before the tanks reached the correct water level. Currently, the tanks are about half full and are perfectly level with the water level lines. Does anyone have any suggestions?
Toilet bowls not filling with enough water
toilet
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Best Answer
The level of water in the bowl is fixed and depends only on the geometry of the S-bend that is part of the toilet
If you add one drop of water into the bowl, it will raise the level at the left side and one drop will fall down the waste pipe.
The only exceptions would be
None of which helps you. To get more water in the bowl you need a different design of toilet.
The syphonic action might mean that if the flow from the tank cuts off sharply, there might be room for more water. However the toilet is designed so that the flow from the tank continues, refilling the bowl completely, after the syphon has initially drawn out all the bowl's contents.