Country Coach Owners Forum Country Coach Motorcoach Forum

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I'm a bit behind in reading my backlogged e-mail but I thought a

I have read this thread with some interest. While I have not had >this problem on my Allure, I do find it somewhat puzzling. As far >as I know the overflow vent comes off the top side of the tank and >there is no drop pipe/tube inside the tank. Therfore, it would not >be possible for a siphoning action. What could be possible is that >the tank is swelling under the pressure of the filling action and >lack of sufficent venting of the air space and the excess overflow.
Once the the water begins to vent overboard and the water filling is >stopped, the tank begins to relax back to its normal shape. Thus, >pushing out even more water until the tank completely relaxes.

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I'm a bit behind in reading my backlogged e-mail but I thought a

was better late than never.

Hodge Phillips wrote about a siphoning action on the fresh water

filling? He said he experienced siphoning of over half the water

just loaded in his 2005 Inspire daVinci.
================================== > Here are my comments on the subject ... We are recently new owners

2002 Intrigue that has exhibited the same siphoning action from the

water tank overflow hoses when filling the tank. On our coach there

hoses forward of the rear axle that overflow when the tank is

larger one (about 1/2 inch diameter) and a smaller one (about 1/4

also found this frustrating after filling the tank and then

gallons siphon back out onto the ground when done filling. We

several gallons this way ... it would siphon off a pretty steady

about 5 minutes and then trickle to a stop.

I did a little experimenting. First I connected a long piece of

tubing to the larger hose by getting a piece of tubing that would

snug fit inside the larger tube. Then when the tank was full and the > siphoning action began, I would blow into the tube to interrupt the

action. This worked but didn't seem like the ultimate solution

didn't want to leave this long tube hanging under the coach and I

want to crawl under the coach each time I filled to attach or

tube.

Next I tried just capping off the larger tube and found that the

out of the smaller tube was much less volume and only lasted for a

of minutes. This worked well and so I have left that larger

permanently capped off and have not experienced any problems. The

fill seems to bleed off through the smaller hose without forming a > continuing siphon.

I might add that prior to trying the above approaches, I had a

Coach service tech look at this situation and he had absolutely no

to what was causing the problem or whether it was normal or not. He

admit that it didn't make sense. It's refreshing to hear that

is experiencing a similar problem. In my view it is not normal to

tank and then siphon off the top end of the tank. It would be nice

someone from Country Coach was reading these posts and could come

Hi,

Siphoning occurs when the hose outside the tank is lower than the

inside. Now if the hose inside the tank is flush with the top of

tank - no siphoning can occur. But if the hose inside the tank is

flush but has some length going down inside the tank, then if the > outside hose end is lower than the inside hose end then siphoning

occur when the water reaches the top of the tank. The water will

until the inside hose no longer touches the water level. One

is to raise the hose, on the outside where it exits the tank, a

of inches above the top of the tank. Another is to shorten or move

overflow hose so that the exit end is even with the top of the