There are a few things you can do to quieten down a noisy water pump:
1) replace portions of the rigid water line coming out of your pump with flexible, SS lines
2) make sure that where ever a line passes through a partition, that the tubing is not up against the partition or it will vibrate the piece of wood causing an increase in the noise. Cut and place foam pipe wrap around the lines where they pass through partitions.
3) remove your pump and remount it on a thicker piece of wood that has been dampened with rubber feet or felt/cork pads
Incorrectly labelled drain pulls seem to be a common problem for some unexplained reason.
You may have to continue to "play" with your brake controller to get the right settings but with some adjustments, it should function properly.
There have been several threads on the forum about propane tank operation - how the regulator works and the proper settings for dual tank operation. Try using our forum search feature to look up these threads -- type in propane regulator/auto-switching regulator or similar.
I did go to the Marshall website to see if they had an owner's manual to download but their website doesn't have much information about the automatic 2 stage regulator found in most RV's nor does it have an owner's manual for you to download. They do have, however, a toll free number where you might call for an owner's manual. 1-800-877-2495
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2008 Cougar 5th Wheel 27RKS
2005 2500 GMC Duramax
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