I have the sanicon twist on (but not portable). There seemed to be a lot of weight on the locking tangs and sure enough after 18 months one of them broke off from the weight. Once this happens you don't get a good seal.
I emailed the company and they sent a replacement collar that screws on.
I used mine in our previous RV as a replacement for the 3" hose. I really really liked it, but between the locking tang failure and the time the hose got a puncture and squirted black water 20' I reluctantly decided to not reinstall it on our new RV.
I've kept it though and I still think about installing it and using it. The way I look at it is that dumping your tanks is one place you don't want something to go wrong - and with the Sanicon, in my experience there were 2-times that something went wrong. With the 3" hose nothing, really, can go wrong.
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2017 Winnebago Adventurer 37F
2016 Lincoln MKX Toad
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