PRINTING APPARATUS AND A LIQUID CIRCULATION METHOD IN A PRINTING APPARATUS

The liquid L flowed into the bypass communication pipe 93 from the feed reservoir 91f can be returned to the feed reservoir 91f by way of the return reservoir 91r by carrying out the bypass circulation of circulating the liquid L along the bypass circulation channel Cb. Since this bypass communication pipe 93 bypasses the discharge heads H, the liquid L does not pass through the discharge heads H in the bypass circulation. As a result, the liquid L can be circulated between the feed reservoir 91f and the return reservoir 91r while the mixing of foreign substances into the discharge heads H from the respective reservoirs 91f, 91r is suppressed.