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.
For example, when a toilet flushes, it will pull cold water to fill up the tank. This can often cause a shower to become suddenly hot. On the other hand, if a dishwasher begins cycling to use hot water, it can cause a shower to become cold. Side effects of tankless water heaters: