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We are saddened to announce the passing of Gary Bunzer on April 17, 2020. We hope the RV Doctor website will continue to provide helpful information for you. Thank you for your interest and support for the RV Doctor - Debbie, Heather and Gretchen

Friday, October 23, 2009

One for the Road

In an earlier column you stated, "The black and grey systems should not be inter-connected, that is, they must each have a dedicated method of storing the waste in holding tanks and each must have its own waste termination or dump valve." Why MUST they? No explanation for this is provided in the article. Is this one more Old Paradigm that should not be propagated? I'm planning to have a single tank, called the septic tank, with one dumping valve. Why would this not work?
Randy, (Magnolia, TX)

Randy, a single holding tank will indeed work, per se, but you’ll soon find that it will need evacuating quite often. RVers tend to use more grey water than that which is flushed down the toilet. In modern coaches the two waste systems are kept separate in order to comply with the RV Codes and Standards as applied to manufactured RVs. Individual builders, as well as private RV owners, however, can do anything they desire. In years past it was quite common to find a toilet tank only, with the grey water bypassing any container on the RV altogether. But this proved quite inconvenient. For longer excursions a separate black and grey system is considered optimum. Some larger RVs may even have three separate dedicated tanks, one for the sinks, one for the shower/tub and one for the toilet.


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