For the system in Fig. 11.26, specify the size of Schedule 40 steel pipe required to return the fluid to the machines. Machine 1 requires 20 gal/min and Machine 2 requires 10 gal/ min. The fluid leaves the pipes at the machines at 0 psig.

Figure 11.26

4 ft Flow 20 GPM 4.0 ft 4.0 ft L- 30 ft 1.0 ft 10 GPM Flow 18 ft 2.0 ft 1-in Schedule 40 steel pipe # 1 # 2 L- 20 ft Floor Swing check valve 6.0 ft Collector -3.0 ft tank Filter Fully open gate valve 2-in Schedule 40 steel pipe L- 10.0 ft