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Step 2 ® DrV, Fit All Components A , Dry fit your tank riser to verify your measurements , After you have dry fitted all components and are satisfied with your measurements, apply an approved fuel resistant, non hardening thread sealant ( pipe dope ) to the NPT threads on both ends of the tank risers . Step 3 - Install Tank Risers A . Install and torque the tank risers into the tank bungs . For Replacing ExistingiloTite 85000 series Spill Containers with 85000= 1 series Spill Containers Step 1 Determining The Correct Tank Riser length for Spill Container Installation A . Existing tank risers with NO MIF 4X4 riser adaptor installed . — Using a tape measure , measure from the top of your riser to finish grade and/or top of the manway cover, Record this measurement. For Fill spill containers this measurement should be 18-118 " from the top of the riser to finish grade . For Vapor Spill Containers this measurement should be 18 " from top of riser to finish grade . If these measurements are less than the above measurements you must shorten your riser to meet these measurements . These measurements allow for an M/F 4X4 Riser Adaptor to be installed on top of the tank riser before the spill container is installed . If you are not installing an MIF 4X4 , add 1 -3/4" to your riser length . Remember, from finish grade to the top of the MIF 4X4 adaptor installed on the riser should be 16=318 " for Fill spill containers. See Figure 1 . B . Existing tank risers with MIF 4X4 riser. .adaptor installed — Using a tape measurer, measure from the top of the M/F 4X4 riser adaptor to finish grade and/or to the top of the stainless steel sleeve . Record this measurement. For Fill Spill Containers this measure must be greater than or equal to 18®318 " ( 16 318" — 20118" ) , and for Vapor Spill Containers this measurement must be greater than or equal to 16 114" (16114" — 20") v C . If your existing riser is to long , there are several possible ways you can shorten them . Some possible methods are : 1 ) Remove the nipple that would have been installed prior to 2001 under the pee-EVR Installation Instructions and Install a shorter nipple . Especially helpful for direct buried spill containers. 2) For multi-port systems , remove the existing rlser( s) and install the correct length nser(s), Use an MA 600 riser support bracket to maintain alignment 16" on center between the fill and vapor riser. 3) For direct buried risers with no nipple and coupler you maybe able to excavate down to tank top using a 10° to 11 OD PVC pipe placed over the 4" riser . Then remove the backfill material as you lower the pipe down over the riser. When you have reached tank top remove the 4" riser and install the correct length 4" riser per following Steps 2 & 3 . After you have installed the tank riser gradually remove the 10 — 11 " OD PVC pipe as you back fill the space between the 4 " riser and the 10 11 OD PVC pipe . 2of8 I