This is the valve that lets water into the tank after the toilet is flushed and then automatically shuts off the water with either a cup float or a rod and float ball after the tank is filled.

If the wrong size (smaller) ballcock is installed or if you set an adjustable ballcock at the wrong position, the big old tank cannot fill to its capacity.

See the problem? You may now be trying to flush a toilet bowl designed to use 4 to 5 gallons of water with just a couple gallons, and you'll end up with a slow poke flush.

This is not a very expensive project, and your annual water savings will be in the thousands of gallons range, cutting your water and sewer bills.

But this is not the case; you can buy a new old-style-looking toilet that will use only 1.6 gallons of water per flush that will blend in with your present bathroom.

Whenever you install a gas-fired piece of equipment, a licensed technician should be hired to do the job so that it complies with all your local codes.

But, remember, that in many cases, it could be the same quality water heater regardless of the length of the warranty and the extra money you pay for the tank may be basically an insurance policy for a longer warranty package.

Final tip from Ed: Have the tank installed with valves and union fittings on all the water and gas lines, so if it ever needs to be replaced, the old heater can be removed easily and a new water heater will pop right in to place using just a couple of wrenches.

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