[sailchef]

Here's an idea. I thought about doing this for an outside solar hot water shower during the summer months.

Install a cistern on a second floor deck, framework,attic, etc.

a 50 gallon poly drum would be perfect. fill with existing water hook ups, hose etc.

Connect a 2 inch hose for car wash, open spigot, stand back. let gravity take over.

Kind of like a mini water tower.