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SAND FILTER SPECIFICATIONS: 143 SERIES Filter tanks shall be manufactured from fiberglass using heavy woven cloth as necessary for strength and have a minimum wall thickness of 0.3". Filter tanks are designed for 50 psi working pressure with a safety factor of 4 to 1. Tanks are factory tested at 75 psi. The underdrain system shall be such that uniform collection of filtered water and distribution of backwash water is provided under the entire bed area. The underdrain pipe is PVC with slotted orifices. The total area of slots in filter is equal to (4) times the area of inlet pipe. The orifices in top laterals are equal to (7) times the area of inlet pipe.

Filter tank is provided with 12" x 16" fiberglass elliptical manway with gasketed yoke and bolt cover which is sealed by internal pressure. Filter shall be designed for a filter rate of up to 20 GPM per square foot of filter area and a backwash rate of 15 GPM per square foot of filter area.

Single 143 Filter (Download .pdf)
Stacked 143 Filter (Download .pdf)
 


Sand Filter Model "A" Length of Tank Sq. Ft. Filter Area

Face Piping Diameter

Max. Flow @ 12GPM Max. Flow @ 15GPM Max. Flow @ 20GPM "B" "C" "D" "E"
143-56 62" 16.2 4" 194 243 324 20" 24" 18" X
143-71 77" 20.8 4" 250 312 416 24" 32" 21" X
143-87 94" 25.6 4" 307 384 512 27" 42" 25" X
143-105 112" 31.0 6" 372 465 620 26.5" 65" 20.5" X
143-124 131" 36.8 6" 442 552 736 27" X 20" 42"
143-152 159" 45.5 6" 546 682 910 26" X 21" 56"
Saddle Footprint=5" wide x 28" long

Bags of (100 lb.) Filter Media Required by Filter Model
Filter Media 143-56 143-71 143-87 143-105 143-124 143-152
Bottom Layer, 1/4"x1/2" Stone 4 5 6 7 9 11
Second Layer, 1/8"x1/4" Stone 3 5 6 7 8 10
Third Layer, 6-20 Sand 3 5 6 7 8 10
Top Layer, 20-30 Sand 15 20 25 30 36 45
Total Bags 25 35 43 51 61 76



Download Single 143 Filter Dimensions

Download Stacked 143 Filter Dimensions