Hot Water Coil-Tempering Valve

OldAA130 wrote: http://contractormag.com/plumbing/cm_column_168/

From the above article...

Remember from last month’s chart (pg. 32) that young children will receive a second-degree burn from 120°F water in 1.2 minutes and a third-degree burn in 3.1 minutes. (The times are longer for healthy adults). It’s easy to see that we have not eliminated danger in the use of potable hot water.

My boys aren't even insane enough to stand in the water for 3.1 minutes after realizing that they are getting burned. Now if you have young babies and toddlers that's a different story.

I gauge the shower temp just right when the blisters start to form on my shoulders...

Take a horse to water -- but you cannot make it drink

You may think your smart enough to not scald or over expose your pink parts -- and your family may have incurred your wrath of instruction from the soap box you stand, about how they WILL NOT be stupid enough to hurt them selves

But what about guests?

What about a chance moment in your day?

is it worth the risk --

NO

YES - by all means send over code temp water to you dish washer -- no hands will ever be exposed there and you dishes will be cleaner and your family will be healthier. That's not a code violation -- its smart to do!

But I submit -- there is no POSSIBLE ( to use your words) SANE reason to send Domestic hot water out to the taps above code limit of 125 degrees. (period - exclamation mark - attention signal - )

I can't argue with the point you are making Sting. It is a good point. My mother in law hates taking a shower at our house. Wow... I just realized something... when she's here she DOESN'T shower!!! Hmmm... that explains a lot!

Fact of the matter is, when I've turned down the temp in the past all I heard was complaining from the wife and young'ns about how the water wasn't "warm enough". So I turned it back up.

I actually have a very similar set-up as you but without the gauge. DHW comes out of the coil in the boiler. The gauge is a good idea. I'll have to add one.

I had one of the tempering valves that has a 120 degree limit. it didnt get hot enough, so we swapped it out for one with a higher limit, 180 degrees I think.
anyway, all I did was turn it up a little past the 120 limit. I could definitely tell a difference in temperatures.