Fresh water tank:
Can have a gravity port, a 3-way FILL valve (one way FILLs tank/Other way provides City Water to RV) OR BOTH
**City water Hose Connection.. internal check valve so when using pump is closes and water does spray out the hose connection
***Pump has an Internal Check Valve that stops backflow thru pump when using City Water connection
Cold Water Line shows a Drain Valve
Hot Water Line should have one also....Called Low Point Drains
Pump suction line shows a 'winterizing' valve so RV anti-freeze can be sucked into/thru pump
Toilet.....Sinks/showers----install shutoff valves so you can isolate each one and still use the other fixtures (otherwise you have to shutdown the whole supply until repairs are made
Could install an accumulator tank (small 2 gal pressurized tank) on Cold Water Line to help control pump cycling when demand is low
Waste tanks.......could install Flush Nozzles and Hose connections
***Anti-siphon/vacuum breaker should be installed at least 2' above waste tank (use a brass one vs those cheap plastic junk)
Waste tank dump valves.......3" for Black/1 1/2" for grey ---both going to common drain header and have another dump valve on that header so when boondocking you can close the header valve/open both waste tank dump valves tying them both together for increased waste capacity (vs grey fill too soon or black not getting enough liquid due to water conservation)