Replacing water heater bypass valve

Discovered a leaking 3-way bypass valve (middle one) in my '04 Pleasure Way Excel TS, can find replacement on-line. There are what look to be metal bands clamping each tubing connection but I can't see how to remove these to put in a new valve. Anyone experienced with this?

By the way, am posting on the B forum since have not seen this type of plumbing in other types of RVs.
Thanks
Chuck