An ultimate pressure of 4×10-12 Torr was reached in a locally made SUS304 stainless steel vacuum chamber. An ion pump, titanium sublimation pump and non-evaporable getter pump were used in the system. The pumping and outgassing effects of the pumps were studied. The pumping effect of gauges and a Ti-ball during preheating procedures were observed. Outgassing during bakeout and after turning the pumps off is also studied.