I use a silicone 'doggy bowl', which happens to work perfectly - it keeps the water pump off the floor, and it's basically 'floating' on the silicone 'bowl' so that none of it actually touches the coach.
now, my problem is, though, I CAN'T hear it!
'14 Thor Palazzo 33.3 compact diesel 100k+miles since '14... US, Alaska, Canada...
AND a '14 Gulfstream Amerlite
AND a '07 ForestRIver Rockwood