If you are talking about the overflow tube for fresh water tank and you are hook up to city water then you have a slight leak pass the check valve internal to water pump. Disconnect city water, turn on water pump and cold faucet for one minute. Turn water pump off and faucet, reconnect city water and see if it will leak again. Might have to do a few times.
2011 Rockwood 8319SS with ProPride 3P hitch/GoodYear Marathons/TST TPMS 507
2008 F250 Lariat CC SB 6.8L V10 4.10 axle ratio (NITTO TERRA GRAPLER G2 LT275/65R20E)
Yamaha 3000iseb generator:Progressive Ind. EMS-HW30C : Eastern Ontario
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