Airstream Rangeline 2023, Owner'S Manual

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Maintenance
2023 Rangeline
9-9
Black Water Tank Flush
The coach has a garden hose style connection to
flush the black water holding tank; see Water Service
Compartment on page 6-6�
To use, hook up a garden hose and turn it on� A
sprayer head with multiple holes will spray the tank’s
interior surface� Use the multiplex home screen to
monitor tank level� Once the tank is about half full,
turn the garden hose off and flush the water from the
tank using the dump valve, as shown in the previous
section� The black tank valve should be closed for the
first couple of minutes and then opened to let the water
out in a rush� Repeat as needed�
CAUTION
Use the black tank flush regularly to keep the holes
on the spray head from becoming clogged.
Drain Systems Cleaning
The only cleaning agents that can be used without
causing harm to the system are household ammonia
and tri-sodium phosphate in small quantities� Do not
use any product that contains any portion of petroleum
distillates� This type of product will attack the rubber
seals of your toilet and dump valve� Also, do not use
any dish detergent or abrasive cleaners� All products
should be marked as approved for ABS drainage
systems�