Regal 53 SC Owner's Manual page 418

Chapter 8
VACUUM STYLE HEAD SYSTEM
Refrigerator Cabinet
Vacuum style toilet systems need to be cleaned periodically
for maximum sanitation and operational effi ciency. Clean
the bowl with a cleaner such as Bon Ami which will not
abrade the toilet bowl lining. Do not use chlorine solvents
or caustic chemicals such as drain openers because the
various system seals may be damaged.
Use the following procedure monthly or when leaving the
vessel for extended periods.
1. Fill bowl with water.
2. Add 1 cup of biodegradable powdered laundry
detergent.
3. Flush toilet by pressing the pedal for about 2 minutes.
Release foot pedal to close fl ush ball.
4. Most marinas offer a service that uses a vacuum hose
connected to the deck waste fi tting that pulls the waste
from the tank. We suggest using a hose after the process
and shoot a few bursts of fresh water down the waste fi tting
at the deck. This helps the residue left from the pump-out
process from building up in the waste hose.
If an odor is apparent from the system try the following:
1. Clean the system out using the above procedure.
2. Check to see that the vent from the holding tank to
thru-hull fi tting is not clogged.
3. Periodically add the correct holding tank deodorant
either Secure or Sealand liquid.
4. Annually replace the in-line vent fi lter located in the
main cabin. This fi lter can be ordered from a Regal dealer
or your local marine supply store.
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