Black-Water Holding Tank; Gray-Water Holding Tank - Tiffin Motorhomes 2014 Allegro Owner's Manual

TIFFIN MOTORHOMES

Black-Water Holding Tank

The "black water" (i.e., sewage) holding tank is located directly beneath the toilet. Before using the toilet, you will need
to treat the tank with water that is mixed with an odor-controlling chemical. These chemicals are readily available at any
RV supply store. Be careful not to spill the chemicals on your hands, clothing, or the carpet because such may cause a
permanent stain. Pull the toilet levers forward to allow the chemicals to mix with the toilet water. Continue pulling the
toilet levers until a depth of at least one inch of solution is directly under the toilet. Release the levers and the waste
tank is now ready for use.
It is important that you use as much water as possible with each flush. This will help
prevent tissue and other solids from clogging the holding tank outlet.
Use only approved RV odor-controlling chemicals in the holding tanks.
Products containing ammonia and petroleum will damage the ABS plastic

Gray-Water Holding Tank

The gray-water holding tank is located in the underbelly of the vehicle. It is primarily used for the drainage from the
kitchen and bath sinks and the shower.
Wastewater Disposal
Both of the holding tanks terminate in a valve arrangement that permits draining each tank separately or together. It is
recommended to drain the black-water tank first before draining the gray-water tank. This procedure permits the water
from the gray tank to wash the black-water residue from the drain lines and hose. The valves that open to release the
water are called gate valves.
The blade that closed the opening in the sewer drainpipes is connected to the T-handle to release contents of the
tank(s) when pulled. The sewer line must be securely capped during self-containment use to prevent leakage of waste
materials onto the ground or pavement. Do not pull the holding-tank gate valve "open" when the protective cap is
installed on the pipe. Always drain the tank into an acceptable sewer inlet or dump station.
Whenever possible, drain both the holding tanks prior to traveling. The carrying capacity of your vehicle
will be reduced if water is left in the black or gray tanks.
!!!
–ALLEGRO®
Caution
Caution
holding tanks and seals.
Chapter 11 PLUMBING & BATH FIXTURES
11-8