Most people believe that if something costs more, it has to be better quality. In the case of generic drugs, this is not true, says Gary Buehler, Director of FDA's Office of Generic Drugs. The standards for quality are the same for brand name and generic products..uch of FDA's review of generic drugs and brand name drugs is the same, Buehler explains (See Same FDA Requirements for Brand-Name and Generic Drugs below).
Then evaluate tank water heaters on the same gph basis to determine how many gallons of storage are needed to meet this demand. While tankless water heaters do not run out of hot water, if not sized correctly, the flow rate of that water can be adversely impacted.
1 When your hot water heater turns on the water expands as it heats. 2  That creates pressure within the water heater tank. 3  In non technical terms, if you have what is called an âopenâ system, this extra volume of water can flow back into the main to the city if it needs to.ttach a hose to the drain valve at the bottom of the tank. Run the other end of the hose to lower place where you can drain rusty hot water without causing damage. Open a hot water faucet in the house to let air into the tank.