Manual

Page 7
LAKOS SST & PRO II Installation and Operations Manual
Media Sand Options
Overall, the open area of the LAKOS underdrain is approximately four times greater than the inlet/outlet
sizeoftheltertank,providingnopressurelossthroughthelter(withoutsand).Whensandisadded
totheltertanks,acleansandoperatingpressurelossof1-2psiistobeexpected(assumingmedia
sands of #12, #16 and #20 sizes).
Required media sand is not included with standard systems, but is available from LAKOS. Only one
grade of sand media is necessary with any LAKOS system -- no coarse gravel base layer is required.
Thefollowingsandgradesaretypicallychosenfordrip/microirrigationpurposes:
Media Grade Sand Size Specications
#20 Crushed Silica 200-250 mesh; 75 micron size
#16 Crushed Silica 150-200 mesh; 105 micron size
#12 Crushed Silica 130-140 mesh; 150 micron size
Site Preparations
A level concrete pad is recommended for placement of the LAKOS SST or PRO II Systems. Position
thepadandtheltersystemforthemostefcientplacementofpipingfromthepumptotheirrigation
systemandthebackwashline.Minimizethenumberofelbowsandchangesinelevationtoandfrom
theltersystem.
Allelectricalworkandcomponentsshouldmeetallapplicablecodes.Protectallwiresandelectrical
components from moisture.
Pre-Installation Checklist
Inventory that all parts are included with the system. See Page 2 for Recommended Accessories.
Checkinsideeachltertanktobesurenoforeignobjectsordebrisarepresentinthetanks.Verify
that the underdrain is in place securely with no damage. Be sure the lower-dome clean-out port is
securely tightened.
Checkallgrooved-endconnectionsforanydamagethatcouldhinderproperassembly.
Assemble legs, if the legs on your system were delivered disassembled.
LAKOS Underdrain:
 SST48inchtanks-Materialisschedule40PVC,withinjection
molded PVCslottedscreenastheopenareacomponent.Open
slotting is internally v-slotted (narrow on the exterior surface, wider
on the interior surface) providing a nozzle effect to more effectively
introducewaterintothetankduringbackwashing.Openslotsizeis
0.012 inch in the slotted screen.
SST 15-36inchtanks-Materialisschedule40PVC,withplastic
wedgewire screen material as the open area component; minimum
135 psi (9.3 bar) collapse strength. Open slotting is internally v-slotted
(narrow on the exterior surface, wider on the interior surface) providing
anozzleeffecttomoreeffectivelyintroducewaterintothetankduring
backwashing.Openslotsizeis0.010inchintheslottedscreen.
LAKOS Underdrain