"The billing works out to be $5.98 per 1,000 gallons you use," says Michael Campbell, the city's water operator.

leaving a vacuum above the bucket, water will, by the pressure of the atmosphere, rise through the pipe, L, lifting the ball valves, P and Q, in its passage, and fill the pump as the piston ...

Waste lines from a sewage ejector or sump pump use a check valve to stop wastewater from flowing back into the basin. When these valves shut, they can make a thud loud enough to be heard ...