Normal for us. We also have the same noises from the tanks when a propane appliance is running and using propane - especially the water heater and furnace.
Suggestion.
Are you sure it isn't coming from the pressure regulator.
I would suggest turning off the tank valve and then slooowwwly open it.
Their is a small valve inside the rubber hoses that sometimes gives problems.
Try it it won't hurt.
Iggy
Our 2014 Roo 23IKSS that we bought in July had this problem also. I called our dealer about it and was told that Forest River had this problem with some of the units that the regulator was louder. They replaced the regulator and hose pig tails in warranty and that took care of the problem completely.
Here's the fix: replace the regulator! How do I know this? Because while at the factory with our CC that's what the mfg rep told them to do. We had that problem.
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Alan, Kathy & Cooper the camping cat
2014 Cedar Creek, 36CKTS
2013 GMC 2500 Denali
Duramax/Allison
Full timers since 5/30/2013
I have the same issue with the driver side tank only on our 2011 Palamino Sabre 31 RETS. Have replace the pigtail, no difference. Where can I order the 30# regulator? Looked at Camping World and local propane dealer with no luck. Any help out there?