What tool to remove fresh water fill collar to replace hose?

Unclamp the hose at the tank
Than pull everything including hose out,
May have to unclamp house at back of fill,
Depends on how big of hole is in the wall

You do not take that apart, unless you drill out the rivets
It was not mfg to come apart, and not install in pieces

^^^^I had to use that driver to change my turn signal fluid^^^^^^????

Thx for all the help and advice. It did not look like I could easily get to the clamp at the water fill. Turns out the van has a few issues and I've elected to hire a mobile RV repairman. It is crazy here in the Phoenix area to get anything fixed in less than a month.

‘‘Tis the season” so to speak........