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SKIMMER LAYOUT and SUCTION LINE SIZING <br /> NOTICE: Installation must comply with all applicable ��`'� � �� <br /> codes, including NSF Standard 50 (if required). Equalizer � � i • <br /> lines may be required on public pool or commecrical � ' i �------- o � <br /> pool installations. i i � o <br /> i i i . <br /> 1. Use one skimmer per 500 square feet of pool surface �_ i_� � <br /> area. Suction line sizes are based on a water velocity �._:_;., <br /> of less than seven feet per second. Since building 18" -�—�-� � ' 18�� <br /> codes vary, check your local building code before �"" ; • Ref <br /> installing pool and skimmers. i't'r I <br /> 2. Suction line sizes for each section of piping must allow ; , i ;, � ; <br /> for the total number of skimmers feeding that section � � ' h I <br /> of the line. Suction line sizing in Chart I allows for this. ; � ' o' , <br /> , � � <br /> 3. See Figures 2 and 6, Pages 2 and 3, for piping layout. �-�� ' � <br /> See Chart I, Page 3, for suction pipe sizing. Plan VieW <br /> 1"Vertical <br /> 4. Divide skimmers as equally as possible between the adjustment <br /> main branches of the piping layout. of frame to 27" <br /> 5. For long pipe runs (in which friction can reduce flow accommodate � 11'/.Ref <br /> and pressure), refer to your friction/flow chart for misalignmen= �„ 7y� <br /> proper pipe sizes. <br /> 6. When planning location of skimmers on one-and two- <br /> skimmer outdoor pools, locate skimmers so tha[ the ° 4'/s <br /> prevailing wind blows into the skimmers. To Pump _ Q <br /> INSTALLATION Suction t <br /> 0 <br /> Concrete: See Figure 7 for basic dimensions. Top cover i ' <br /> frame has 1" vertical height adjustment. <br /> NOTICE: Skimmer MUST be surrounded by at least 4" of 26" I � � o <br /> pool structure concrete in a monolithic pour, using a cold <br /> joint as shown in instaliation drawings. 2�� ' ' <br /> Line Connections and Testing: Connect pump inlet line 2�� ° • <br /> to rear port in bottom manifold (Figure 7). Skimmer is ABS - - - <br /> plastic; manifold connections are 1-1/2 or 2" threaded or o ° .� Q - <br /> 1-1/2" slip. For threaded connections, do not use pipe J� <br /> dope; to seal joint use RTV Silastic #732* (preferred), Alternate � tqualizer d <br /> teflon tape, or Plasto-)oint Stik**. For slip connections, $eCtlOtl VieW Line from <br /> apply PVC primer to PVC pipe only. Then apply ,�BS to Main Drain. <br /> PVC solvent cement to both pipe and slip connections. <br /> Consult dealer for correct solvent cement for pipe used. �- <br /> Assemble joint per cement manufacturer's instructions. , <br /> Allow at least 3 hours before pressure testing. �� , r� <br /> AWARNING plastic cements and primers can be flam- � <br /> mable, poisonous, or both. Closely follow cement man- I <br /> ufacturer's instructions when using plastic cement. �� \��`---��� II <br /> �� �� i � <br /> In installations where equalizers are not required and �� �� I <br /> where the main drain line does not connect to the skim- �-- II II T <br /> mer equalizer port, low water levels in the pool or �) II II II <br /> clogged skimmer baskets may damage the pump due to �I II == II II <br /> loss of prime (if skimmer sucks air) or cavitation (if skim- <br /> mer clogs). Any air pulled in by skimmer(s) can be �i �� �� II <br /> trapped in filter tanks, which is a safety hazard. If skim- II <br /> mer regularly sucks air, raise pool water level or contact �—'— �'_ =I� _ ==r <br /> your pool service representative for advice. � �� � � <br /> •Dow Corning Front View <br /> ""Lake Chemical Co.,Chlcago,IL <br /> Figure 8: U-3 Skimmer Installation <br /> Drawings and Specifications <br /> , <br />