I've been looking at this. We have a guest shower that takes about 3
minutes to get hot water. Here is a sample product designed
specifically to be mounted at the far destination, like under a sink.Â
Push the button and the pump runs, pushing hot water into the cold pipe
until the pump senses the water is hot.
https://chilipeppersales.com/collections/frontpage/products/chilipepper-on-demand-hot-water-recirculating-pump-model-cp9000-b-version-wireless-wired
https://www.homedepot.com/p/Rheem-1-25-HP-Hot-Water-Recirculating-Pump-with-Under-Sink-Kit-RH18537/301852244
Here is a sample video:
https://www.youtube.com/watch?v=AQC_shrv8KA
I have not used any of these products. I hear the Chilipepper one is loud.
Brian
On 1/25/2022 8:45 AM, Pat Horne wrote:
> This is off target from the OP.
>
> Iâ??ve seen homes/shops where it can take minutes for hot water to reach a
> fixture. One DIY fix for wasting water I ran across was to add a small pump,
> check valve & a bit of control circuitry at the fixture. Plumb the pump &
> check valve between the hot & cold lines so that when the pump runs it will
> transfer water from the hot line to the cold line with the check valve
> keeping the cold water from getting into the hot line.
>
> Add a push button near the fixture that turns the pump on for either a preset
> time or monitor the hot line & turn off the pump when hot water is present.
>
> It still takes the same amount of time but it doesnâ??t waste water.
>
> Peace,
> Pat
>
> Pat Horne
> We support Habitat for Humanity
>
>
> On Jan 25, 2022, at 9:38 AM, Jim Stone <1789alpine@gmail.com> wrote:
>
> It is plumbed to the hot water line. These heaters have two potential
> uses: as a sole source of hot water (e.g., for a sink where there isnâ??t
> another hot water source) or as supplemental heat for situations like mine.
> For us, it is really just for hand washing and dish washing and not to have
> to waste so much water waiting for the main heater to kick in. I donâ??t
> notice a drop off after extended use, so I assume 7 gallons is enough to
> allow the main hot water to come through. The installation instructions
> cover both methods and do warn you not to set the heat on the main unit too
> high; as I recall, the max for incoming water was something like 140º.
>
> Jim
>
>> On Jan 25, 2022, at 10:09 AM, Jeff Scarbrough <fishplate@gmail.com> wrote:
>>
>> So, is this installed in the cold water line? Our master bath is a
>> long way from the primary water heater, and it takes a while for warm
>> water to make its way up. But I'd have to plumb the tank outlet into
>> the regular hot water supply or take 4 minute showers. Or plumb it
>> with a hot water supply...
>>
>> On Tue, Jan 25, 2022 at 9:40 AM Jim Stone <1789alpine@gmail.com> wrote:
>>> I got tired of waiting for hot water in my kitchen (my dissatisfaction with
>>> my Rheem tankless water heater is a subject for a different day) and
>>> installed a 7 gallon Bosch water heater in the basement, as close to the
>>> kitchen faucet as I could get. It makes an incredible difference and my
>>> wife considers it one of the best improvements I have made to our house in
>>> years. I am inclined to agree with her. The 7 gallon version has to be
>>> hard-wired to a dedicated circuit, but the 2.5 and 4 gallon versions can be
>>> plugged in. One of those should meet your needs pretty easily. Here is a
>>> link to the Bosch units, although I am sure other brands will work just as
>>> well.
>>>
>>> https://smile.amazon.com/Bosch-Mini-Tank-Tronic-3000-ES4/dp/B0148O65IE/ref=sr_1_2_sspa?crid=1GEI41I05EXPQ&keywords=under%2Bsink%2Bwater%2Bheater&qid=1643121197&sprefix=under%2Bsink%2Bwater%2Bheater%2Caps%2C72&sr=8-2-spons&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyTzhaMk9QNzlZMlhDJmVuY3J5cHRlZElkPUExMDEwNzk5M0RPREhQQTVYSllVUiZlbmNyeXB0ZWRBZElkPUEwMDIxNTQ4MzEwRUQyUUZBTThRSyZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU&th=1
>>>
>>> Jim
>>>
>>> On Jan 24, 2022, at 5:26 PM, john niolon <jniolon@att.net> wrote:
>>>
>>> tired of just cold (really cold) water in the shop sink./..thinking about a
>>> tankless/instant water heater. Would like to stay
>>> with 120v if possible to avoid additional wiring (me crawling around in
>>> attic dragging wire with bad knees and hips. I have an available plug
>>> within 6 ' of sink
>>>
>>> pros and cons ? recommendations.
>>> This will strictly be a hand washing sink to be used after putting up my
>>> tools (shop content)
>>>
>>> thanks
>>> john
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