Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 14, 2025 ...

Enhanced refrigerator performance

March 04, 2018, 10:32:11 pm

If your coach has a propane refrigerator or any other type of refrigerator that has a drain to the exterior it is vital that the drain hose has a rubber duck bill on it or some other way to keep outside humidity from entering your refrigerator. This will cause substandard performance as the humidity will migrate up the pipe resulting in warmer temperatures inside the fridge. If your duck bill is old and no longer sealing replace it if possible. Or better yet Loop the drain down a bit to form a trap. Prime the Trap so it is full with water and then add a couple squirts of baby oil on both sides which will seal the top of the Trap and keep the water from evaporating. Condensate will trickle down through the oil and the oil should last forever.

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Re: Enhanced refrigerator performance

Reply #1 – March 05, 2018, 08:40:03 am

Oh, oh, my fridge has what must be the original ribbed plastic drain hose from 1989, even tho the fridge is about a 2010 or 2012 model Dometic.
The hose terminates in a catch cup. The hose is also wrapped with duct tape because it must be brittle with age. Nothing on the discharge end. The end that is attached to the fridge outlet  is somewhere way above the rear access opening.
Does this mean I have to remove the fridge enough to access the attachment point to put in new hose?
Where do I get hose and appropriate size duck bill?
RV store---NOT Camping World?

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Re: Enhanced refrigerator performance

Reply #2 – March 05, 2018, 09:50:35 am

You can actually use a small piece of cellulose sponge
inserted in the bottom end of the drain hose to accomplish what the duck bill does.

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Re: Enhanced refrigerator performance

Reply #3 – March 05, 2018, 09:52:25 am

Refrigerator drain hose

for how to replace the drain hose

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Re: Enhanced refrigerator performance

Reply #4 – March 05, 2018, 10:36:53 am

It's not high tech, but Brett donated his coffee cup to the drain hose when the fridge was replaced. I always keep some water in the bottom to submerge the hose. 

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Re: Enhanced refrigerator performance

Reply #5 – March 05, 2018, 11:42:13 am

Our ribbed hose hangs in a rectangular plastic holder/cup that is held in place with a Phillips head screw. The holder/cup is about 2" deep so holds quite a bit of water.
Guess I will keep about an inch of water in the cup so it functions like the rubber duck bill end.

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