The red and blue lines close together are probably your low point drains for the water system. The single blue line is probably the fresh water tank drain.
If all of those should have screw on caps. You unscrew the cap to drain those lines. There could valves directly above the lines, but many campers do not have the valves.....just the caps holding the water in.
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Chap , DW Joy, and Fur Baby Sango
2017 F350 Lariat CCSB, SRW, 4x4, 6.7 PS
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