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� � � ��e � r�,�,�.- <br /> ' � Sizin� of Pumn Station <br /> 1. Detcrmine Surface Area T <br /> Rectangle = Area = L x W � 2�o ��l Wideh <br /> x = square feet 1 <br /> Length <br /> Circle= Area =t[ x{Radius}� <br /> 3.14 x x = squaze feet Radius <br /> Other=Get Surface Area from Manufacturer n=3.1a <br /> square feet <br /> 2. Calculate Gallons Per Inch <br /> There are 7.5 gallons per cubic foot of volume, therefore you must multiply the area <br /> times the conversion factor and divide by 12 inches per foot to calculate gallons per inch <br /> Area x 7.5 gpft'+12 inchs per foot <br /> x 7.5+12 = 2'�gallons/inch � 2 50 <br /> 3. Calculate Gallons to Cover Pump(with 2 inches of water covering pump) Estimated Sewage Flows in Gailons per day <br /> (Height(in)+2 inches) x gallons/inch(�t2) ��� <br /> ���( 'L- + \b )X 2�r� _�_�d1�OnS um r <br /> of Type I Type II Type III Typc <br /> ( k," To+.2 Bedrooms IV <br /> 4. Calculate Total Pumpout Volume <br /> a. To maximize pump life select sump size for 4 to 5 pump operations per day. 3 450 32050 2g8 � <br /> L O gpd+4 = 1 f Z � 5 gallons per dose 4 600 375 256 °r`'" <br /> b. Calculate drainback S 750 450 294 �';�� <br /> 1. Determine total i e len th �o feet. 6 � 525 332 �a�. <br /> P p g ..� � ioso boo 3�0 <br /> 2. Determine liquid volume of pipe,/� %Y3gallons per]W feet. 8 1200 675 408 �iW°,�,. <br /> 3. Multiply length by volume: Drainback uantity= <br /> �_feet x l�,'f3 gallons/100 ft._�� galions. <br /> P' d'umaa inrhn C■Ilans er 100 feet <br /> c. Total pump out volume equals dose volume+drainback <br /> I l 2 .S eallons per dose+ 5� gallons= � b��S gallons 1.25 7.77 <br /> 1.5 10.58 <br /> 5. Calculate Volume for Alarm(typically 2 to 3 inches) 2 17.43 <br /> Depth(in)x gallons/inch(�s2)= 2.5 24.87 <br /> _�x�__�gallons 3 38.4 <br /> 4 66.1 <br /> 6. Calculate Reserve Capacity(75% the daily Flow) <br /> Daily flow(see page D-7)x.75= <br /> ��x.75= 3�?'�gallons <br /> Reserve Capacity <br /> 7. Calculate total gallons <br /> gallons over pump+gallons pumpout+gallons alarm +gallons reserve capcity <br /> #3+ �i4 c+# 5+#6 Q.es . <br /> �►�+1�+ �� + 3�j�'S= l u 3�gallons Alarm . <br /> Pump On $ '' <br /> 8. Total Depth (Total gallon divided by gallon per inch) <br /> Totai Gallon (#�+gallon/inch(#2) (a �� <br /> I b345 +�?_�`�inches To I Pumpout Volume <br /> Pump Off <br /> �--___ <br /> Pump Height �� <br /> l. Float Separation Distance(equal total pumpout volume) ��" 4" <br /> Total pumpout volume(�i4c)+gallons/inch (ii2) ����f� <br /> �}�_��inches <br />