
07-28-2008
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Senior Member
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Join Date: Apr 2006
Posts: 7,087
Rep Power: 8
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Antiscald valves are something else again. And oddly enough I went to both Home Depot and Lowes trying to get one for a showerhead last week--they aren't stocked any more, haven't been for a while. Only the oldtimers remember them!
The reaosn I say "code" is just an excuse, is that I'm fairly certain there is no 'national hot water code' 'national plumbing code' 'national building code', in other words, there is no "CODE" that goods being imported and sold all over the country would have to meet, relevant to showerheads. Meeting the economiser limits is good marketing, but codes requiring them to drip? I'll believe it when I see it cited, by name and chapter.
Heat exchanger water "should" not be able to get hotter than household water. Household hot water heaters often can be set in excess of 160F and engine thermostats might reach 180F, but in either case THERE are plbuming codes that require overtemperature releases and pressure releases, your boat or home heater should blow off water if it gets too hot, or shut down the line. Plenty of old systems don't, but there have been so many lawsuits over scalds, that I can only wonder why the anti-scald valves all went off the shelves. They just worked so well.
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