
Gravity Flush
This is the system toilets
have used for over a century: The flush valve or
“flapper” opens and water rushes down through the
bowl. Manufacturers have steadily improved tank and bowl designs
to create a more powerful flush with less water. One of the most
effective improvements was to simply enlarge the flush valve from
2 in. to 3 in. or more.
| Pros: |
| Cost. Some of the models that perform well in lab tests
cost as little as $150. Easy to maintain. Diagnosing problems and finding replacement parts is relatively easy. |
| Cons: |
| Tanks can sweat. If condensation forms on the tank of
your current toilet, the same problem will likely occur with any
gravity toilet. Big differences in performance. There are still a lot of wimpy flushers out there. You have to do your homework to find a model that performs well (see “Toilet Tests,” left). |
