The Best, Drain master (about 150 bucks OUCH!)
good enough and a whole lot cheaper Two brands
Tetford's is the Sentinel.. I have one never used in the box (though the ground elbow is used and sanatized) A really good design and a robust hose. Took me many years to wear the one it was to replace out.
Rhino Flex is Camco's offer... I liked the Sentinel beter. But ... it's a close race.
Now.. if you have problems attaching/detaching
Pliers type oil filter wrench.. Fits perfectly.
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times