| There are two pressure systems  available. The pressure assisted flush system means that pressurized air is  pushed into the bowl with each flush, thereby reducing the chance of clogging.  However, this system is expensive and requires higher maintenance, not to  mention its noise level. The gravity flush system uses the weight of the water  to create pressure when flushing. This system is the more common, the more  economical and generally requires the least amount of maintenance.
 Keep in mind that most toilets do  not come with seats. Depending upon the shape of your toilet, round or  elongated, you will choose a seat to match. There are also a variety of  materials available: oak, wood composition, vinyl, plastic or polypropylene, to  name a few. There is also now a large selection of novelty toilet seats to  choose between.
 
 When you have chosen your new toilet you need to decide if you’re going to fit  it yourself, which you may be able to do if you are confident with the tools  you will have to use and fitting plumbing.
 
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