Shower water saver – Cold Water Saver
The Cold Water Saver device addresses the issue of wasted cold water during shower heating by using a 3-way bypass valve to collect and reuse this water, resulting in significant water savings for households.
Patent Information
- Application Number
- FR2023010545
- Authority / Receiving Office
- FR · FR
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-10-03
- Publication Date
- 2025-04-04
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
A significant amount of cold water is wasted during the heating process of showers, which is not only wasteful but also consumes valuable resources.
The Cold Water Saver device utilizes a 3-way bypass valve to divert cold water flowing during the heating process into a detachable container, which can then be reused for various household purposes.
This solution effectively saves approximately 1 liter of water per shower by collecting and reusing the cold water that would otherwise be wasted, with an estimated annual savings of 320 liters per person.
Smart Images

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Abstract
Description
Title of the invention: Shower water saver - Cold Water Saver
[0001] The Cold Water Saver is a water saver that regulates the temperature (or heating time) of shower water.
[0002] In fact, it allows you to save WATER by being attached to the tap or shower or bathtub mixer using a 3-way diverter valve (or 3-way diverter valve) [female-male-male] - Screwed or connected to the mixer or shower faucet by the upper female port. - Screwed or connected, by the lower male thread, to a container or connected by a quick connector to this container or connected by a rubbery elastic hose system - or by any other fixing system - to a bottle or container of 0.5 liters to 2 liters (ideally 1.3 liters); the objective is to recover the cold WATER flowing during the waiting time, called heating, of the shower or bath WATER, in this container. - Screwed or connected to the shower head cord by the intermediate (middle) male port, to divert the water into the shower head once it is hot, thanks to the valve.
[0003] The device detaches into two parts thanks to the quick connector, located on the lower part, with a downward click, which allows the bottle container with cold water to be transported and transferred for household use (filter carafe, cooking preparation, washing dishes, watering plants, kettle, brushing teeth, washing clothes, etc.).
[0004] Also, to prevent the weight from damaging the taps once the container (or bottle) is full, and with repeated action, it can be connected to the 3-way diverter valve using a shower cord - or shower hose - and placed directly in the shower (on the floor) or directly in the bathtub (inside).
[0005] So, when we wait for the WATER in our shower to heat up, we recover this cold, potable WATER, consumed, paid for and not used thanks to the Cold Water Saver, and this simple gesture.
[0006] On average, 1 liter of WATER will be saved per shower taken, because after various tests, the wasted cold WATER flowing through the pipes during the heating time is from 0.5 liters to 4 liters, depending on the linear footage located between the hot water tank, or water heater, and the arrival at the WATER point (shower mixer or bathtub).
[0007] This WATER, a precious liquid essential to our life on Earth, will then be saved and used for our daily use: filter carafe, plants, tooth brushing, kettle, dishes, cleaning, various cleaning...
[0008] I estimate the savings at around 320 liters of WATER per year per person.
Claims
Claims
1. Device for saving cold water for heating a shower or a bathtub, characterized in that it comprises a three-way diverter valve (1) for directing the water either into a container (3) or into the shower head, characterized in that it comprises a quick connector (2) connected / screwed to (1) and (3) between the two, and characterized in that it comprises a cold water collecting container (3) allowing (3) to be detached from the device by the detachable lower part of (2), in order to transfer the water for use.
2. Device according to claim 1, diverter valve, characterized in that one of the ways (female-high) screwed to the tap / mixer of the shower or bathtub, characterized in that one of the ways (male-low) for screwing a quick connector (2) into it, characterized in that one of the ways (male-middle) for directing the water once hot, in the shower cord to the shower head.
3. Device according to claim 2, quick connector characterized in that a way of claim (1) is screwed from above to (2), allowing the device to be connected: (1) connected to (2), (2) connected to (3), and (3) detaching from the device thanks to the lower part of (2), disconnectable.
4. Device according to claim 3, characterized in that a bottle or silicone type container (3) collects the cold water flowed before heating; and connected to the quick connector (2) by the lower, detachable part. The water collected in (3) directed by the bypass valve (1) and passing through the dedicated channel, that is to say by the lower channel of the valve, crossing the connector (2), collected in (3). (3) being characterized for its detachment thanks to the disconnectable part of (2), allowing the free use of the collected water.