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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