2007-07-20 03:26:49 · 22 answers · asked by doscar212 2 in Home & Garden ➔ Do It Yourself (DIY)
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.
2007-07-20 03:29:56 · answer #1 · answered by ? 4 · 1⤊ 0⤋
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.
2007-07-20 04:25:34 · answer #2 · answered by Rich Z 7 · 1⤊ 0⤋
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.
2007-07-20 03:31:00 · answer #3 · answered by Willy 3 · 0⤊ 0⤋
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).
2007-07-20 03:42:10 · answer #4 · answered by T C 6 · 0⤊ 0⤋
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...
2007-07-20 03:35:12 · answer #5 · answered by Anonymous · 0⤊ 0⤋
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.
2007-07-20 03:32:36 · answer #6 · answered by Anonymous · 0⤊ 0⤋
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.
2007-07-20 03:29:39 · answer #7 · answered by Le BigMac 6 · 0⤊ 0⤋
Toilets use cold water so when you flush and it refills, it takes the water supply away from the shower.
2007-07-20 03:28:52 · answer #8 · answered by Tasha 2 · 0⤊ 0⤋
Because the cold water is diverted due to the flush and only hot water comes out of the showerhead
2007-07-20 03:30:13 · answer #9 · answered by BIG JOE 2 · 0⤊ 0⤋
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.
2007-07-20 03:31:48 · answer #10 · answered by John himself 6 · 0⤊ 0⤋