Hi guys, I found a small skip in the sprinkler section of Male Ward. You essentially just skip going through the debris and running past all the bath tubs and instead go straight to the second valve by using a wallride.

You do a wallride, turn around and run, then look back while running to deload the level so you can get into the second valve room. I found it to be a little bit tricky, and by my timing it saves just 7s-ish.