Treato found 16 discussions about Cold Symptoms and Cats Allergy on the web.
Best Answer: When the toilet is flushed, the toilet is robbing pressure from the shower, which is usually close to the toilet. As the COLD water pressure goes down from the toilet flush, the HOT water pressure is higher, therefore the water gets hotter as the COLD pressure goes down.
Why Does Shower Pressure Change When a Toilet Flushes? A pressure-balancing valve keeps your shower comfortable. If you live in an older house, and you have to ask people not to flush the toilet when you're in the shower, you need to install a pressure-balancing shower valve. Because some 200,000 Americans are scalded every year, many states have started requiring these valves in all residential showers.