nosticks

Hey nosticks, do you know where the low point valves are on our camper? I know about the low point drain beside the door for the fresh water tank, does this also drain the rest of the camper?

I check the solenoid locate under the bed and I found the 5 amp fuse and it appear to be good, I ask my wife to press the use/store switch and was by the solenoids switch and I did not hear any clicks sound, does that tell me to replace that solenoid switch.