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PUNfP SLLECTION PROCEDURG <br /> A. Determine pump capacity: <br /> Gravity Distribution ENO PERfORATION OF A PERFORA7ED �ATERA� <br /> 1. Minimum su�gested is 600 gallons per hour (10�pm) lo stay ahc�id c�f �-c.a�� co�.� <br /> water use rate. �'��` `-�''�^,,,",!�+;�`" <br /> � �A✓.•^' roosoi� . �.�;;.,�7"y.. <br /> . Maximum su��ested for dcli��ery to a drop bc�x oF a homc systcm is 2,700 v-� �" ���y�� <br /> Layer of Geoi��llle FoOric (or tu. <br /> gallons per hour(�15 gpm) tc� prevent huild-up c�f pressure in drop hc�x. �� �oamy sa� �y�, �m�n iay<r o1 nay or va.cw��ca <br /> . i in red rosm oox�) <br /> CFSr� i��^ al\ ���������un DNlled Hon�omolly <br /> Pressure Distribution ?� ` '•• ��ia �aD N�ar rop <br /> ���---,-; <br /> 3. a. Sclect numbcrof perforatcd latcrals � � ''•'P'°' "' ``"" 1z• '° `�°` <br /> t" i'�;Oram Fleld R_ocY:� .,'�� ol Hock Laytr <br /> b. Scicct perforation spacing = 'S7 fL \ --�v(awhuns lucai�a ai <br /> c. Subtract 2 ft. from thc rock laycr lcn�;th. u.a� Sand Laycr Bo��o�, o� Lanial <br /> k« a�T�.��" 2 f t. _ �� f t. , a- <br /> �I soll Propaly Swnlied <br /> Belore Vlocinq Sand Laycr <br /> d. Determine thc numbcr of s}�accs bet�vicen }�crf�rations. <br /> Length perf. spacing =�� ft. +�_ ft. _�sE�accs <br /> TA�II.E Of PGRPO[2ATION llISCI IARCPS IN CP61 <br /> c. /�:� spaccs+ 1 = �� E�crforations/latcr�l <br /> ' f. Multiply perforations per lateral by nutnber c�f latcrals to �t�,d Pcr(orationdia�iieter(inchcs) <br /> gct total numbcr of crforations. <br /> � �a '�» ��� <br /> �r�r� X �� .,�,��- .�Pcrforations. <br /> 1.Oa 0.5G 0.74 <br /> 1.5 O.G9 0.90 <br /> �• � X B�.r= .-`�( �pm. t 2.0� a.ar> >.oa <br /> 2.5 0.89 1.17 <br /> SELECTED PUI�IP CAPACITY ����, m 3.0 0.98 t�8 <br /> gP a.o i.i3 �.a� <br /> 5.0 ].26 1.65 <br /> B. Determine liead requirements: <br /> aUse 1.0 foot nf head for residential systc�iis. <br /> l. Elevation difference bctwccn pump�lllCj �Olilt Of Cj1SCIli1f�C. bUsc2.0 feet of head(arothcrestablishments <br /> ti feet <br /> ?. If pumping to a pressure distribution systcm,add fivc fect for pressurc <br /> required at manifold � <br /> �� feet <br /> 3. Friction loss Pipc Lcngth <br /> a. Enter friction loss table with�pm and pipe diameter. r Point of Discharbc <br /> Read friction loss in feet per 7(X) fcct frc>m table. <br /> F.L. _ . � J ft./1(}O ft of pipc Elcvaiion DifCcrcnce <br /> b. Determine total pipe len�th from pump to dischar�;c Pump <br /> point. Add 25 percent to pipc len�;th for fitting <br /> loss, or use a fitting loss chart. Equivalcnt pipe F-186 <br /> length - 1.25 times pipe length = <br /> ,�-� 1_5 inch 2.0 inch 3.0 inch <br /> �x i?5 = J f C�t �,�m Friction loss per 100 fi of pirc <br /> c. Calculatc totai friction loss by r��ultiplyin�; 1U 0.69 0.20 <br /> friction ]oss in ft/100 ft by equivalcn�ipc icnsth. 12 0.96 0.28 <br /> Total friction loss= S�, x��-]00 = � � � feet 14 1.28 0.38 <br /> 4. Total head re uired is the sum of elcvation ciiffcrci�ce, 16 1.63 0.48 <br /> special head 9equirements,and total friction loss. 20 2.47 0.73 0.]1 <br /> 25 3.73 1.11 0.16 <br /> .�,�' +�_+ `� � � 30 523 I.SS 0.23 <br /> (1) (2) (3c) 35 790 2.06 0.30 <br /> d0 11.07 2.64 0.39 <br /> 45 14.73 3.28 0.48 <br /> TOTAL HEAD �� l' , feet 50 3.99 0.58 <br /> 55 4.76 0.70 <br /> 60 5.60 0.82 <br /> :. Pump selection <br /> 1. A pump must be selected to deliver at least � gpm (Step A} <br /> with at least j`��feeE of total head (Step G). <br />