The first time I filled ours up, I used a regular garden hose and that tasted pretty terrible. It is 'okay' tasting with an RV water fill hose with a filter on the end. Hadn't thought about the silencer kit being the culprit. I'm hoping it gets better with time and usage, since there is a lot of plastic in the lines, fittings, and tank.
Update on the water situation:
I bought two filters for the van and they were delivered the next day via amazon prime. I drained the tank by running the rest of the 15 gallons through it which might have helped too.
The first one is a filter for the end of the hose that I placed it between the hose and the tank.
- Camco 40043 TastePure RV/Marine Water Filter
The second one is for under the sink.
- Waterdrop 10UA Under Sink Water Filter System
The water now tastes fantastic. I would definitely recommend these!