I live in Fort Collins, CO. About 2 weeks ago I drained the water storage tank (main and hot) and the grey and black tanks as part of my winterizing. Unfortunately, only today did I try to do the anti-freeze flush. (I have a 16' Scamp
, 2007, and am trying to follow the procedure in the manual.) I had the following problem: After filling the water tank with ~1 gallon of RV Anti-Freeze, I first turned on the electric pump (it made the expected whirring sound), I then turned on the cold water faucet in the sink and waited for the colored (RV) fluid to appear, but it did not! The system made gargling type sounds and spat out a small amount of clear water only, even after I waited for about 5 minutes. I also turned on the shower faucet and got a small amount of clear water, but not colored water.
I suspect one of the following may be wrong:
1. My driveway is not horizontal, and the back of the trailer is higher than the front. I can't see where the pipes connect to the water tank, but if it is too near the back of the tank then the inlet may be above the level of the fluid (given that the tank is not horizontal on my drive and I only put in 1 gallon). I tried to look but can't see where the pipe meets the tank. I could move the trailer to the road but that is quite difficult right now. Easier would be to add another 1 or 2 gallons of the anti-freeze, which would bring the fluid level higher and ensure that it can enter the needed pipe inlet - is there reason why this would be a bad idea (apart from cost of anti-freeze)?
2. It is possible there is a bit of ice that has formed within the pipe network somewhere, that is blocking the needed flow. (Note that I did get some clear water through, so it isn't totally frozen up, but I suppose some small constriction may be frozen.) How to check (wait for a warm day...)? Would this be very bad?
3. The pump needs to be primed or has some other problem, but I doubt this is the case. (It worked at the end of the summer and even now makes the correct sound and manages to pull through a bit of residual water).
4. Something totally different?
Please suggest how I can trouble shoot this in the easiest way? Also, how important is this anti-freeze step given that I have emptied the main tanks?