If D from BC were a plumber:
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From: krw on 16 Apr 2010 19:13 On Fri, 16 Apr 2010 00:01:02 -0700, Winston <Winston(a)bigbrother.net> wrote: >On 4/15/2010 7:18 PM, mpm wrote: > >(...) > >> Speaking of plumbing..... >> I know better than to ask this question of a bunch of EE's, but.... > >I would check your thermostatic control valve. >Sounds like it is installed backwards. The one-lever mixing valves don't even have to be installed backwards. If the handle is mounted on the wrong side of the stop they'll operate backwards. DAMHIKT.
From: RogerN on 16 Apr 2010 19:41 "Michael A. Terrell" <mike.terrell(a)earthlink.net> wrote in message news:4BC78CD2.DEAC58D0(a)earthlink.net... > > He'd be known as 'Pipe Dope' > > > -- > Lead free solder is Belgium's version of 'Hold my beer and watch this!' If D from BC were a plumber he'd still be a lousy electronic designer, but at least he'd have an excuse! RogerN
From: Paul Hovnanian P.E. on 16 Apr 2010 19:57 First, make sure you have adequate system pressure and not too much pressure drop. You could have some restriction in the system that will cause funny behavior. I'm assuming this is a two valve setup. Others have suggested improperly installed single handle controls, thermostatic valves (rare in the USA, common in Europe). If its two valves, consider rebuilding them with better quality components. Some cheap valve seats will swell at higher temperatures and cause the flow to drop. The feedback between the hot and cold flow setting can cause weird stuff to happen. -- Paul Hovnanian mailto:Paul(a)Hovnanian.com ------------------------------------------------------------------ "There's something vewy scwewy going on awound here." -- Elmer Fudd
From: Copacetic on 16 Apr 2010 23:41 On Thu, 15 Apr 2010 19:26:01 -0700, Charlie E. <edmondson(a)ieee.org> wrote: >Two possibilities. First, the hot and cold line for the shower may be >adjacent, so the cold line is slowly heated to the same temp as the >hot line. then, when you run the hot line, it gets a little cooler as >the tank goes down, but the cold is still the same temp. > >OR That is silly. To heat the cold water pipe's water, said water would have to be stationary. Otherwise, the water temp flowing in the pipe RULES against any peripheral heating. A completely silly suggestion. So, IF the hot water is the ONLY water on for a LONG enough time to heat a siamesed pipe's water (A VERY LONG TIME), THEN said water would be warm or hot, but that would end IMMEDIATELY, once the water in that pipe is turned on. If the hot water is not ran constant, it too will cool to ambient temps. A totally false claim you have made there.
From: Copacetic on 16 Apr 2010 23:43
On Thu, 15 Apr 2010 19:26:01 -0700, Charlie E. <edmondson(a)ieee.org> wrote: >It is a pressure thing. There is a constriction in the cold line, and >it has lower pressure than the hot line. You have to really crank the >cold, and really diminish the hot to get the pressures equalized. No. Both pipes have the same pressure. Hot water gets used less from a FLOW standpoint because less is needed to arrive at the desired operating temperature. All the pipes in your house all have the same pressure behind them. Pressures in a given pipe can be reduced, but only by way of FLOW elsewhere in the system. |