Why does the shower get scalding hot when someone flushes the toilet?
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Because the cold water used to balance the hot water comes from the same pipe that feeds water to the toilet, the toilet is more forceful and it draws the water away from the shower pipes for a second leaving you with only hot water.
th toilet uses cold water
i know ive noticed that, so when my hubbys in the shower- i'll do the dishes,lol
Toilets use cold water so when you flush and it refills, it takes the water supply away from the shower.
the toilet only uses cold water, so there's none left in the shower.
Because you are draining the cold water to refill the bowl.
flushing the toilet takes all the cold water to flush. then all there is left is hot water. lol i hate that experience. ouch!
I just thought it our old townhouse, but I'm glad to hear that someone else has that problem!
Well, the toilet refills itself from the cold water supply, so as it starts draining the cold water you'll get less cold water in the mix coming out your shower head, so it will get hotter. Simple enough?
The cold water in the mix of cold & hot going to your shower is thrown off when cold water is diverted to refilling the toilet tank.
cold water that would normally go into the shower head is being diverted to filling the toilet-bowl tank
some showers do. mine does. i think it depends on where the water heater is or something. who knows just dont flush when some one is in there or you can turn down your water heater so no one gets burned. thats what I do especially in the summer.
Because the cold water is diverted due to the flush and only hot water comes out of the showerhead
The toilet needs to fill up for the next flush and whilst it is doing so the cold water pressure is reduced. Therefore more hot water is coming out of the shower than cold whilst the toilet refills.
Your pipes are to small to supply both the shower and the toilet at the same time. It's a common problem. There are shower valves that compensate for that automatically. They work great.
Well I think it is to Kill Bacteria & then it uses cold water to reflush back the toilet. Or proabaly it uses it Half cold and half warm at certain temperature.
This is because the main hot and cold water lines to the bathroom have a finite maximum flow rate. When you flush the toilet there is a sudden high demand for cold water. This means that less of it is available for the shower.
All depends on your boiler system and your water pressure in the area or specific house, as some pluming will complicate things and lose water pressure.
If you have say 16 bar of pressure and half the pressure is taken up refilling the flush system, but your shower needs 12 bar of pressure to flow an even rate of cold water, then you will be 4 bar low and this will mean the mix of hot water will be greater than cold... sorry complicated answer...
The water pressure is too low, so the cold water to the shower drops off to half when the toilet flushes. You can buy a Gage that screws on to an outside faucet to show the pressure. You should have between forty and eighty pounds (60 lbs is perfect).
Because the cold water directed somewhere else in the house will leave you with warmer water. and tiolets use cold water.
OR
say someone was washing there hands in warm water directed to somewhere else in the house, then you would get cold water!
You don't have a temperature balancing mixer valve on the shower.
Instead your valve lets you get some hot and cold water at the same time. When someone flushes a toilet that lowers the amount of cold water pressure in the pipes and reduces its flow. Now your mix has too little cold and the hot predominates.
If you can afford to replace the valve the problem disappears. If not try taking a shower when no one is likely to be flushing a toilet.
you can actually install a valve that will regulate that...but you would have to tear your wall apart to do that.probably need a plumber
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