On May 17, 10:11*am, "Bob F" > wrote:
> keith wrote:
> > On May 17, 1:04 am, "Bob F" > wrote:
> >> wrote:
> >>> On Sun, 16 May 2010 17:07:29 -0700, "Bob F" >
> >>> wrote:
>
> >>>> wrote:
> >>>>> On Sat, 15 May 2010 22:42:56 -0500, (Gary
> >>>>> Heston) wrote:
>
> >>>>>> In article >,
> >>>>>> > wrote:
> >>>>>>> On Sat, 15 May 2010 17:47:19 -0700, Oren > wrote:
> >>>>>> [ ... ]
> >>>>>>>> I'm not expert. I'm not sure of the word that would describe my
> >>>>>>>> PEX manifold (not looking at my *.PDF). There is a loop H/C at
> >>>>>>>> the top. I wish I knew the exact wording, but I know cold water
> >>>>>>>> is looped back to the heater, when hot is demanded.
>
> >>>>>>> If you can find a reference for this I'd appreciate it.
>
> >>>>>>>> Gosh that "word" escapes me now.
>
> >>>>>> I believe that's a convection circulating system.
>
> >>>>>> Large buildings use a circulating pump in the hot water piping,
> >>>>>> with a large central boiler as the source.
>
> >>>>> But for hot water? Residential? It's possible, sure, just would
> >>>>> like to see how this thing works. Sounds too complicated to be
> >>>>> reliable.
>
> >>>> As I re-plumb my house, I have added a recirculation pump and extra
> >>>> return line. If I'm going to want hot water, I push a button, and
> >>>> 30 seconds later (or less) I can turn on the hot and have it hot
> >>>> in 2 seconds.
>
> >>> At the cost of twice as much wasted hot water. I understand how a
> >>> recirculation pump works. How's this magic manifold work?
>
> >> At the cost of no wasted hot water, in fact no wasted $.017/gallon
> >> water. I don't have a clue what the "magic manifold" you speak of is.
>
> > When you turn off the hot water you now have twice as much "waste" hot
> > water in the lines. *Read the thread.
>
> No, I don't. The pump turns off before the return pipe is filled. And I haven't
> dumped the water in the pipe down the drain waiting for it to get hot. Try
> thinking.

Baloney. The water won't be up to temperature that quickly. Truy not
to make crap up.