Water use: Shower vs. bath
Rub a dub dub, use the low-flow shower instead of the tub.
Photo: JHill 
Q: My husband and I are reducing our household water use, and we pretty much agree on everything except this. He swears his morning bath actually uses less water than my semi-long showers, but that can't be right. Can it? – Marianne, NHComments
My wife and I share the bath water (not at the same time!) we are on a meter and run a bath 4" deep that equates to 40 litres or 10.5 galls. I have the bath second and rinse off with a plastic jug that takes 2 litres more. When we put the kettle on for a cuppa any left after two cups goes into a thermos flask saving hot water to be added to more for the next cuppa
I love disco balls, theyre my favorite bath toys
taking a shower should use more water
I love to take baths
If he is large, the husband may in fact use less water in a tub than a shower.
After losing 35 pounds over the summer (construction projects) around home, my winter baths seemed to take longer to fill with me in the tub. But 35 lb. is close to 3.5 gallons of extra water which must be supplied by the tap because I did not bring it with me to the bath.
The wife, if she is small, will need a lot more water to reach the same volume in the tub.
So at what body mass does the break-even point.... More
If you really want to know, just plug the tub when you take your shower. Be honest (shower for same length of time), and see how much the tub fills. Compare this to when he draws his bath (with no one in the tub, which would raise the apparent displacement).
Most of the time I have showers (and I swapped my showerhead for a low flow one - easy to do), but I love a long soak in the bath. I offset my carbon guilt by leaving the bathwater in and using it to flush the loo, pre-soak cooking pots and water the trees.
