Allegro RED Owner's Manual - Tiffin Motorhomes

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TIFFIN MOTORHOMES –ALLEGRO <strong>RED</strong>® Chapter 11 PLUMBING & BATH FIXTURESGray-Water Holding TankThe gray-water holding tank is located in the underbelly of the vehicle. It is primarily used for the drainage from thekitchen and bath sinks and the shower.Wastewater DisposalBoth of the holding tanks terminate in a valve arrangement thatpermits draining each tank separately or together. It isrecommended to drain the black-water tank first beforedraining the gray-water tank. This procedure permits the waterfrom the gray tank to wash the black-water residue from thedrain lines and hose found in the external sanitationcompartment. The valves that open to release the water arecalled gate valves. The blade that closed the opening in thesewer drainpipes is connected to the T-handle to releasecontents of the tank(s) when pulled. The sewer line must beFigure 11-11. Sanitation Coupling, Valve and Hosesecurely capped during self-containment use to preventleakage of waste materials onto the ground or pavement. Do not pull the holding tank gate valve “open” when theprotective cap is installed on the pipe. Always drain the tank into an acceptable sewer inlet or dump station. Wheneverpossible, drain both the holding tanks prior to traveling. The carrying capacity of your vehicle will be reduced if water isleft in the black or gray tanks.The holding tanks should only be drained when they are at least . full. Doing this will provide a sufficient volume ofwater to allow the complete flushing of waste materials in the drain lines and hose. If the tanks are not . full, add enoughwater to allow for sufficient flushing.To empty the wastewater tanks, connect the adapter, supplied with your vehicle, to the drain hose (Figure 11-11). If theadapter is lost or broken, another one can readily be purchased from any RV supply store. Once you have placed theadapter on the drain hose, it can remain there for the life of the hose. One end of the hose threads up through the holein the bottom of the service compartment and the other end of the hose feeds into the sewer at the dump station.Unscrew the cap from the drain. Connect the hose, with the adapter in place, to the drain fitting. Open the gate valvecompletely by pulling on the T-handle. The tank will start to drain as soon as the T-handle is pulled. After you havedrained the black-water tank, immediately drain the gray-water tank. This procedure helps to flush the black water fromthe sewage hose.When both of the tanks are empty, flush them with a freshwater rinse before you close the valves. The gray tanks areeasily flushed by pouring a couple of gallons of water into a sink drain. The drain outlet is engineered for quick releaseof the drain hose adapter. Always close the gate valves and secure the end cap to prevent leakage while the vehicle isin transit.After draining the black-water tank, it is recommended to add a holding-tank deodorant to help controlthe odor and break down the solids. Follow the instructions given on the holding-tank deodorantpackage. When using dump stations for draining the holding tanks, keep other travelers in mind. Please practice goodhousekeeping! Leave the dump stations in good order. Above all, do not pollute!11-9
TIFFIN MOTORHOMES –ALLEGRO <strong>RED</strong>® Chapter 11 PLUMBING & BATH FIXTURESSewer Connecting and CampingWhen camping at parks with sewer connections, it is important to keep the black-water, holding-tank, gatevalve closed at all times, except when dumping. The gray tank can be kept open while hooked to a sewerconnection, but again, the black-water tank must be kept closed. This is done so that an ample quantity ofliquid remains in the tank to provide a smooth flow through the gate and drain valves when dumping.Sufficient liquid in the tank causes a swirling action that should take any accumulated solid wastes with it.Accumulation of solid wastes in the black-water tank can be avoided by keeping the gate valve closed whenconnected to the sewer connection. If the valve is open, solid wastes may accumulate in the tank which mayeventually result in costly repairs.CautionThe gray-water tank valve must be in the “open” position whenoperating the optional washing machine.No-Fuss FlushThis vehicle may be equipped with a flushing system for the black-water holding tank. When draining your sewer tank,attach a water hose to the sewer spray connection. After the tank is drained, leave the gate valve “open” and open thewater valve to allow water to spray inside the black-water tank; this will clean the inside of the tank of any debris thatmay be left inside the tank. After this procedure is done, disconnect the freshwater hose and close the gate valve.CautionBe sure the gate valve is “open” when flushing the tank. Do not use the same hosefor the No-Fuss Flush that is used for filling the freshwater tank.11-10
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