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Old 08-25-2019, 12:33 PM   #1
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roadtrout's Avatar
Tiffin Owners Club
Join Date: Dec 2011
Location: High Ridge,MO.
Posts: 12
Water in Basement Compartments

I have a 2011 allegro open road 34tga that randomly has water in the freshwater tank compartment and opposite side sewer/water utilities compartment. sometimes after rain but not always? I don't mean "damp" but open door and "runs" out! Seals all good,cleaned and siliconed. Not loose (fitting tightly. Gate valves are sealing. No water leaks evident while at full hook ups. Everything is dry inside! Any thoughts ???

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Old 08-25-2019, 02:37 PM   #2
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Tiffin Owners Club
Join Date: Sep 2013
Location: DFW, Texas
Posts: 3,526
Is it possible that your fresh water tank is filling to capacity and overflowing? The water pump check valve has been known to let water backflow into the tank.

Dan & Ro with two Rescued Boston "Terrorists" Jade & Jewel
2017 Phaeton 40IH Maroon Coral - Power Glide Chassis with IFS (05/17)
Previously '15 Tiffin Allegro RED 38QRA and '06 Itasca Sunrise 35A
'12 Jeep JK Wrangler Sport or '08 Honda Goldwing
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Old 08-26-2019, 04:33 AM   #3
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Tiffin Owners Club
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Join Date: Apr 2011
Location: South Chesterfield, Virginia
Posts: 344
I agree with Lt Dan that it is most likely the check valve in your water pump. It happened to me one time. I temporarily filled my fresh water tank and cut off the city water supply until I could order a new pump. Another way to check is to empty your fresh water tank, connect to city water, and watch your sensor readings for your tank filling. I was relieved my issue was the pump check valve and not the main valve that is used to fill the tank. Good luck.
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