Getting the unit ready for use.

You will know if plumbing is ok when filling up tanks and running water. To clean the plumbing system use Clorox for everything except the hot water tank. Put two to four cups of Clorox into the fresh water tank from the top vent overflow it has, by using a small funnel and pour slowly as air will come out as it makes room for the Clorox, remember it is a bleach and you can cover the blow back with a white wash cloth so it does not get on carpets or you. Run the Clorox and water through your plumbing system and let it sit overnight with tank full and lines full except the hot water tank. Flush it a few times until Clorox smell goes away after a day or two. The hot water tank should have a by pass that allows you to shut off the intake from the rest of the water system. The hot water tank/heater is pressurized when full as it has a one way valve in and a pressure release valve on the top. When pressurized and hot it is dangerous to open pressure release valve as you can get burnt, but standing back do open it and release pressure before draining it from the bottom drain plug, that may a plastic plug or a hot rod,(electrical heating element) that is connected by a sleeved screw on electrical connector. With power off disconnect the electrical connection and unscrew the hot rod if present to drain the hot water tank. It has to be cleaned with white Vinegar which is a light acid that will remove the buildup of minerals and any mold. It has to be injected into the tank at the top pressure release valve using a turkey baster with a slow drip, as air will have to come out of tank as it goes in. That is done with the tank empty and the bottom drain plug or hot rod in and the bypass valve closed and water pressure off. then when you have put in about two cups of vinegar close the pressure release valve and open the bypass valve and turn on water pressure to fill tank. It fills with top pressure release valve open and is full when water comes out the top. When it does close the pressure release valve and the water will stop. Let it sit overnight then open the top pressure release valve and then open the bottom drain valve. Crud will come out and then it should flow clean, if really bad redo it a few more times until it flows clean.