I think this was the Spring Startup Guide you where referring to, correct?
Sunline Coach Owner's Club - Sunline Owner's Files - Sunline Spring Startup Guide
In your case of a new to you camper you do not know what was in the campers water system before, it will need a sanitize treatment. While you may not yet drink from the fresh water tank, even bathing, teeth brushing or doing dishes needs a system sanitize. The bacteria level can be off the charts.
Here is some more help on sanitizing from our FAQ Articles section. Topic 2 with links.
If you need help or questions ask away. The 1st time doing a system sanitize can be a bit to figure it all out. However next time goes a lot easier. I also do the baking soda soak after the sanitize to help extract the chlorine smell/taste out of the plastic. Since you have never used the water system yet, before you do the bleach solution sanitize, try some plane clean water through the system to make sure everything works right. This way if you have a problem you do not have to deal with high chlorine solution water and a leak. Once it works right then go to the chlorine shock treatment.
A heads up on the water pump. Mack has you all fixed up with the "How To". I will add another useful tip.
It is OK to leave the pump turned on when you are at the camper, even if outside as you can still hear it near the camper. The pressure switch will shut the pump off when the pressure builds. Now the tip:
Tip: When you leave the camper to go for a walk, hike, into town etc. turn the pump "off".
I learned the hard way. We came back to a fairly new camper to the smell of hot electrical insulation. The tank was pretty low on water. The system needed to pressurize and the pump kicked on. Since the tank had only about 1 to 2" of water in it, it sucked air over the top of the waterline. We call this dry locking the pump. The pump lost water prime and then will run forever trying to build pressure before the pressure switch ever shuts off. When we can back to the camper and walked in, I smelt something right off. Oh boy...not good. I could not hear anything but a fine high pitched whine. Tracked it down to the pump running not stop for hours.
Lesson learned, shut it off when you leave. On a boondocking setup it could of burnt up the pump and drained the battery. Or just as bad, a fitting of faucet breaks and you have 20 gallons of water all inside the camper.
That pump was never the same after that. I ended up upgrading to a variable speed pump after getting fed up having to manually prime the old one that was only about 1 year old at the time.
Have a good trip, take pics, and let us know how it goes.
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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