Good circulation: when a waterpark's submersible pumps break down so does the fun. Follow these preventive maintenance tips to keep the water, and the good times, flowing.(TECH TALK)

Anyone responsible for waterpark maintenance knows that if mechanical or electrical equipment is going to fail, it generally does so at the most inopportune time, such as Fourth of July weekend.

No one can prevent every problem. But following some basic guidelines for preventive maintenance of submersible pumps and motors on a regular basis will minimize such emergencies.

The first step is to develop a spreadsheet, specific to each type or location of pump. Each pump should be listed as to manufacturer, model number, serial number, impeller number and motor data such as horsepower, operating voltage and full-load current rating. Other columns could include purchase date, last service date and equipment manufacturer contact information. All of this should be logged during installation or updated if the equipment is replaced. Having this information readily available during an upset condition makes a repair that much easier.

The annual basic maintenance and service inspection of a submersible pump is easy and should not take more than 30 minutes. Be prepared with the proper instruments and tools: a reliable amprobe for measuring voltage and current; megohmmeter for checking insulation resistance or detecting water intrusion; and an ohmmeter for measuring and checking continuity of windings.

Remember, safety first. Before attempting any inspection or repair, be certain the incoming power is off. You should use a tag-out/ lockout procedure to ensure that no one can energize the equipment while you're inspecting it.

Once the power is off, start your visual inspection. Don't overlook the obvious. Check the control wiring for loose connections and the cable for damage. And don't forget to make sure you've got a good ground connection.

Next, check the pump unit itself for any blockages to the impeller and the impeller for any damage that could have been caused by passing foreign objects or worn parts; hats, stuffed animals, ponchos and the like tend to gravitate to the pumps. If there is a protective screen or trash rack prior to the pumps, make sure it's clean.