a) A Pump like any appliance is alergic to dirt, leaves, twigs and scum.
a2)Pumps need the liquid being pumped to cool them.
a3)Pumps operate off of 115 VAC and some units run on 12 VAC not to be confused with 12 VDC. 115 volts listing is the same as 110 volts ac and 120 volts ac. Pumps that run on 12VAC use a transformer. It is easy to confuse 12 volt ac low voltage lighting as 12 VDC. They are not the same. 12VAC is alternating current and 12 VDC is direct current. If you mix the two bad things happen. LI> a4) There are motors that run on higher voltage namely 230 VAC single phase used mainly in Europe and industrial USA. Also there is 230 VAC and 460 VAC in three Phase. The majority of the pumps sold at wholesalepumps.com run off of 115VAC single phase.
a5) The most misused pump term is “mag-drive pumps” Most of them fall under the hysteresis style of motor. There are Capacitor start, squirrel cage, split tube , brushed and Hysteresis(mag drive, wet rotor) motors. Hysteresis(mag drive) pumps are very economical. The rotor is a magnet (two poles) and an impeller attached to it. The Magnet is standard ceramic or sometimes rare earth. The magnetic rotor rides on a ceramic shaft with Teflon holders. Split tube motor pumps are also very economical but the rotor turns magnetic under the spell of the stator. It also rides on a ceramic shaft. Both split tube and histeresis(mag drive) are lubricated by the water being pumped, no seals or steel bearings are used. Capacitor start pump motors are sealed from the liquid and require a seal and steel bearings to ride on. Capacitor start pumps are by far the most powerful. Hysteresis , split tube and capacitor start pump motors are for continuous duty. Brushed pump motors are rarely used. Mostly in diaphragm pumps and are not for continuous duty.
Never look at the Sun or UV lights directly or you will go blind . All UV lights have a glow ring or eye that shows if the unit is working. All UV lights are rated in Watts. From 7 all the way to 40 watts. UV lights kill bacteria and algae. Do not exceed the GPH of any UV light or you will render it useless. UV lights can handle low pressure apprx. 15 psi. Pressure filters also handle about 15 psi... Pressure filters are usually made up of Three parts; two media and some sort of bio ball to promote healthy bacteria . The media is usually a course poly pad and a carbon impregnated pad. The bio balls are perforated plastic balls. Do not exceed the GPH on any filter. If your pump exceeds the rated GPH of the UV or Filter you can divert part of the water into the UV and filter. Run the rest of the water to the water feature. try