A stainless steel "Sierra Club cup" makes a good ladle. Pour or ladle water over yourself and apply soap. Run water into the bucket until the water in the bucket is the right temp and then shut the valve off. Direct the shower head into the bucket and turn on the valve to highest flow and highest temp. To shower in the least amount of water with a given shower head take a small bucket (or large bowl) into the shower with you. If you are in an extremely water stressed environment, you could just shut the shower valve to stop the flow while you lather up. If it's a tankless, then you are putting the moving parts through more actions than necessary. I doubt that these shower valves are designed to be pressurized like this.įinally, you didn't state what kind of water heater you have. This could be causing leaks in seals and at connections inside the wall. Note that when you shut off the water at the shower head, you are fully pressurizing the mixing chamber of the valve and the lines from the mixing chamber to the shutoff valve. I know these shutoff valves can save water, but I don't think modern shower valves work with them properly. If you have a modern shower valve with an "anti-scald" feature and are shutting off the water with the shower shut off valve, then turning the water back on is setting up transient swings until the system settles down again. If you wanted to prevent this, a check (one-way) valve on the cold water feed to the shower should do that. When returning to normal flow, instead of a mixture of hot and cold, you have a mixture of hot and hot, until that water is flushed back out of the cold supply pipe. The draw might be only some fraction of what is used (with the rest coming from the cold supply as per usual) but it ends up with a slug of hot water in the cold supply pipe to the fixture. But if any cold water is used anywhere in the house (an opening), the opening between the hot line and the cold line at the control valve means that some of the cold water drawn elsewhere can be sourced from the hot line at the shower, resulting in hot water entering the cold water pipe for some distance. I don't think water will 'leak' in a pipe unless there is an opening My guess is that some hot leaks back into the cold pipes, (the control valve is open, the shutoff beyond the control valve is closed) so the mix is not the same temperature as it was until that's flushed out. This happens with my kitchen faucet and one of those "quick-flip - not quite total shutoff" valves that screw into the aerator. (I don't think we have a water circulation pump since we usually need to let water from the hot tap flow for a while before hot water actually comes out.) I've considered that maybe this was a psychological effect: perhaps I got cold from being soaking wet while the water was off, and the water only seemed hotter? I haven't formally measured the temperature, but I have tried reopening the shut-off valve while dry, and the water is still initially very hot, so I don't think it's an illusion. Why are there a few seconds of very hot water? Finally the water is at my original desired temperature.Then there are a few seconds of very hot water.(I assume that this is water in the shower hose that cooled off.) First there is a small amount of cold water.I set the shower faucet to my desired temperature and wait for the water to reach that temperature.I installed the valve between the handheld showerhead and the shower hose. The water temperature in my shower is hard to control, so I bought a shower shut-off valve hoping to be able to conserve water by setting the temperature at the beginning of my shower and to temporarily turn it off while I lather myself with soap.
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