The bathroom door is cleverly fitted so that it can be swung open and latched onto the far side of the hallway - making the bedroom area completely private from the living area of the coach and forming a small dressing area.
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The bathroom design was changed in 1968. Some differences are fairly obvious; the later bathroom (coach #411 and up) is slightly larger than the earlier version, the later sink is a smaller corner unit, and the toilet and sink positions were reversed. Since the bathroom was expanded towards the center of the coach, the resulting hallway is 5 inches narrower - forcing the bathroom door to be cut down 5 inches to fit.
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Less obvious are the major changes to the coach that were the real reason behind the redesign. To reduce weight, the coach was originally equipped with a greywater system which uses recycled shower and sink drainwater instead of fresh potable water for toilet flushing. This reduces the total demand for fresh water - allowing for smaller 30 gallon tanks.
However, to make all this work required a total of five electric pumps - including one mounted in the base of the toilet to pump the waste into the holding tank. This particular "Ultra Pump" (more commonly known these days as a macerator pump) demanded regular maintenance, or subsequent messy and unpleasant repair.
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Photo Credits:
Early bathroom: from 1966 Ultra Inc. sales brocure
(coach owner unknown)
#489 bathroom: Ronnie Large
(coach owned by John Howell)
Floor plans: adapted from 1966 Ultra Inc. sales brochure
Ultra Pump ad: from Family Motor Coaching magazine, September 1966
Early bathroom: from 1966 Ultra Inc. sales brocure
(coach owner unknown)
#489 bathroom: Ronnie Large
(coach owned by John Howell)
Floor plans: adapted from 1966 Ultra Inc. sales brochure
Ultra Pump ad: from Family Motor Coaching magazine, September 1966