[mtpockets]

I had a similar problem with BDR 621. First the obvious, tighten the *%&# out of the hose clamps on the main fill hose. Second, the smaller vent hose, make sure its only long enough to reach from the fill neck to the tank> then tighten the %*#@ out of those clamps. It helped with the burping when the tank would start to get full and eliminated the minor leak. Also check to make sure none of the spot welds on the aluminum tank aren't leaking. Mine developed a pin hole after 7-8 months. JB Weld to the rescue. Good luck.