Air filter dirty. Remove, clean and reinstall.customer service. Have diaphragm replaced by a qualified serviceA small air filter is located on the underside of the pump. This should beremoved, rinsed, dried and reinstalled periodically.AIR PUMPSCARE AND OPERATING INSTRUCTIONS FORMODELAP-2AP-3AP-4AP-8Watts1.52.83.57Air Flowcu. in/min73110275549Pressurepsi1.451.452.02.0Max Waterdepth3’3.3’4’4.5’E.G. Danner Manufacturing, Inc. will repair or replace any air pumpfound to be defective within one year of original purchase by originalowner from an accredited dealer. Air filter, flapper valves, anddiaphragms are wearable items and are not covered by this warranty.Cutting or altering the cord voids any warranty consideration. Forwarranty repair, return only the part that is defective to our factory.Please include a dated proof of purchase and $5.00 for postage andhandling. Damages or injuries resulting from negligence or misuse ofthe product are not covered by this warranty. This warranty gives youspecific legal rights. You may have other rights which may vary fromstate to state. To validate this warranty keep your proof of purchase(Copy of sales receipt from an accredited dealer).DANNER MFG. INC. • 160 Oval Drive, Islandia, NY 11749(631) 234-5261 • Visit our web site at www.dannermfg.comLIMITED ONE-YEAR WARRANTYMAINTENANCE & TROUBLESHOOTINGIf pump volume decreases or stops, check the following: Airline tube may be kinked. Straighten out tube or install newtubing if necessary. Airstone clogged. Replace air stone. Plug is not secure in receptacle. Check all electrical connections. Internal diaphragm is worn. Replacement diaphragm kit Item #14605 is available for models AP-4 and AP-8; please call Dannertechnician. Note that the 14605 repair kit provides parts to repair twooutlets. Use one kit to repair the AP-4 and two kits to repair the AP-8.The AP-Series air pumps have been designed to satisfy the requirementsof a multitude of water related applications. These beautifully designed,environmentally friendly pumps can be used for:Aerating Single or Multiple Aquarium TanksOxygenating Hydroponic NutrientsOxygenating Indoor Ponds and Water GardensAerating Single or Multiple Terrarium TanksOxygenating Indoor Water FeaturesAll AP-Series air pumps operate on standard 110V electric and come with6’ power cords. They have been designed to operate efficiently with amotor that is non-oil lubricated.Models Item #’sAP-2 40512 06402AP-3 40513 06403AP-4 40514 06404AP-8 40518 06408ZG144 3/1114