A home's water pressure can be a pain in the neck when it runs sluggishly and slowly. Or it can be an expensive ticking time bomb just waiting to blow. Low water pressure makes showering, washing dishes and even flushing a toilet a major annoyance. Too much water pressure can damage appliances like dishwashers, water heaters and washing machines, and can void manufacturers' warranties, as well. The first thing to do is invest about $10 in a simple water-pressure gauge that screws onto a faucet outside your house. It should read between 50 and 75 pounds per square inch. If it exceeds 80 pounds per square inch, the pressure could harm appliances. Most homes have a pressure regulator where the water line enters the house. If so, adjusting the flow-regulator screw setting should do the trick. If it doesn't, have a plumber check fixtures and pipes, and if you don't have a water-pressure regulator, get one installed. It'll cost about $75, plus installation. And that's the On The House tip for today.