马桶的问题

老房子，地下水管原因不能用节水马桶。家里一个人便秘必然会造成下水慢。想把马桶换掉，不节水的马桶那个是个好的选择? 请分享。

i got a kohler toilet, it is fantastic. never clogged after changing to kohler.

Perfect, I will buy a Kohler also.