The terms are thermostatic valve and pressure balance valve.
U.S. plumbing codes now require that showers be built with either a thermostatic valve or a pressure balance valve. Older homes frequently have neither, leading to the common situation where someone taking a shower experiences temperature fluctuations when a toilet is flushed or a faucet is turned on elsewhere in the house. The newer valves prevent this fluctuation.
A pressure balance valve reacts to changes in the pressure of the delivery water. Typically, both hot and cold water sources are fed into a pressure balance valve, and its job is to ensure that the volume of water that leaves the valve is a constant mix of these two sources, even if the delivery pressure of the two sources changes. These valves ensure that the water temperature doesn't change by more than 3 degrees. The desired temperature needs to be adjusted each time you take a shower.
With a thermostatic valve you can select the temperature and the valve keeps the mixed water temperature constant. Each time you turn on your valve it automatically adjusts to the preset desired temperature, keeping it to within 1 degree.
2007-03-13 09:15:15
·
answer #1
·
answered by greymatter 6
·
1⤊
0⤋
Good call Miss, I believe that's what they are looking for. It typically does have to do with the valve. A manual valve just mixes the water but a thermostatic valve typically has temperature control (although sometimes manual valves have this as well) and also safety features to turn off the water if it gets too hot.
2007-03-13 11:45:29
·
answer #2
·
answered by Sunday!!! 2
·
0⤊
1⤋
Where some of these people get their answers, mystifies me. Yours was right on target "Misunderestimated". At least some people care if they know what they are talking about. One way to spot an old manual valve, they normally had 2 or 3 handles, and you had to adjust the temperature yourself. Later models had 1 handle. Today, you can still buy the old fashioned 2 or 3 handle valve faucets at Lowes or Home Depot, for homeowners who like to replace instead of update their faucets. The danger is still there for a person to get scalded though.
2007-03-13 16:51:15
·
answer #3
·
answered by poppyman54 5
·
0⤊
0⤋
Manual shower as you call it is gravity fed and requires a header tank as it runs straight off of the hot water system whereas the thermostatic does not require a header tank as the water is run straight from the mains supply and is then heated by electricity which is controlled by thermostat.
I have a gravity fed shower and much prefer it to the other sort. However it is often more convenient to have a thermostatic one as it requires less space and plumbing in but it does require an electric pump whereas gravity fed does not.
For the gravity fed you can set the water temperature on your hot water tank by a thermostat which is normally attached to the hot water tank.
2007-03-13 08:49:21
·
answer #4
·
answered by Anonymous
·
0⤊
2⤋
the only thank you to strengthen the conflict by way of the two a instruction manual or thermostatic bathe is to in good condition a tub ideal for low rigidity. that's the chilly and heat feed pipes are in 22mm a minimum of, no longer 15mm or smaller. i think of Mira do a tub with greater pipework. you additionally can attempt a greater bore flexi hose from the mixer to the bathe head. The extra reasonably-priced hoses have particularly a small bore. check out the version at your community plumbers or B and Q. The bathe head could make a distinction as properly. attempt an rather greater head with variable pass varieties.
2016-10-18 07:18:11
·
answer #5
·
answered by juart 4
·
0⤊
0⤋
a thermostatic shower heats the water itself where as a manual shower requires the water to already be hot
2007-03-13 08:58:22
·
answer #6
·
answered by Anonymous
·
0⤊
2⤋
Hi
thermostatic showers automatically cool down where as manual ones get really hot and there sno control ove rthe temperature( not recomended a they will mess your boiler up!)
regards
Jam
2007-03-13 08:46:49
·
answer #7
·
answered by jam 5
·
0⤊
2⤋
One runs heated water to an automatic, preset temperature; the other, you have to dial in yourself.
2007-03-13 08:47:47
·
answer #8
·
answered by tmlamora1 4
·
0⤊
1⤋