After 6 1/2 years of trying just about all brands, I have settled on the Valtera fittings. You do have to turn them until you get the hose really bunched up at the top.
I got no leaks at all with two hoses coupled together even if the hose is laying on the ground with water in collecting in low spots.
Last winter after staying in an AZ RV park that did not allow the hose to rest on the ground, I bought a "slinky" dealie that holds it up and provides drop to the sewer inlet so low spots aren't problem now. But when they were a problem the Valtera fittings worked great.
Wish I had bought the slinky years ago, I use it all the time now.
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Clay WA5NMR - Ex Snowbird - 1 year, Ex Full timer for 11 years - 2004 Winnebago Sightseer 35N Workhorse chassis. Honda Accord toad.
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