OUR PLUMBING SYSTEM DETAILS
Here is a list of plumbing products we used for our van.
WATER TANKS

Our van has a 35 gallon fresh water tank located under the bed bench, 15 gallon gray tank for the sink, and a 15 gallon black water tank for our urine diverting toilet. We normally don't have two separate dump tanks but we knew running plumbing around the vehicle chassis would be difficult plus having two separate tanks means less dumping! We've always bought these Class A tanks.
WATER PUMP

These SeaFlo pressure pumps are the best! Be sure to buy the 12 volt DC of the pump! They do offer normal house outlet pumps so it can be confusing. Remember: 12 volt DC appliance whenever possible.
We connect the pump straight to the fresh water tank with PEX connections. We recommend always T-ing off one pump to both your sink and shower to save space and money.
RV DUMPING FITTINGS

This RV attachment will connect to the other RV dumping fitting listed. To dump, you connect your Rhino Hose.
RV DUMPING FITTINGS

After using the correct sized hole saw blade, this attachment should tightly fit in the hole of the tank you made. Use Henry's water proof adhesive to make a gasket to prevent leaks. The other RV dumping fitting with connect to this.