Install Instructions

Trapzilla
®
Grease Interceptor
Installation and Operations Manual
TZ-160, TZ-400, TZ-600 Models
MNL-TZ 20
TZ-ECAmodelsshipwith12plasticplugstollthe
holesleftintheouterlid.Incaseplugsdonott,use
expanding foam sealant.
Step5:Workingfromthebottomoftheassembly,in-
stall eight (8) self-drilling, self-tapping screws (provided)
through the extension collar wall and into the adapter
ring. Two of these screws should be installed in each
of the four (4) skirt areas of the adapter ring. Check
theextensioncollarheightdimensionfrequentlyduring
this operation to ensure that the collar has not moved.
Note:Usecautionwhentighteningthesescrewstoen-
sure that they do not strip.
Step6:Placetheadapterring/extensioncollarassem-
bly onto the Trapzilla unit. Position the small cover onto
the extension collar. Secure the adapter ring and the
smallcoverwiththebrassnutsandatwashersprovid-
ed.Sealthegapbetweenthe18”extensioncollarand
extension collar adapter ring using a silicone sealant.
Step3:Removetheextensioncollarfromtheadapter
ring and, with an appropriate saw, cut along the line cre-
ated in Step 2 to remove the excessive extension collar.
Step4:Reinserttheextensioncollarintotheadapter
ring ensuring that the cover alignment key on the ex-
tension collar is aligned with its recess in the adapter
ring. Reset the extension collar height to the dimension
determined in Step 1.
Line marking the bottom
of the "skirt" (adapter
ring has been removed
for clarity)
Excess part of
extension collar
to be discarded
after cutting
along line
Reinsert extension collar into adapter
ring to insure alignment.
Adapter ring
Extension collar
Modified extension collar
Self-tapping screws
8 Places
Adapter ring
"Skirt"
5/16-inch Hex Nut
4 Places
5/16-inch Washer
4 Places
Note: Tighten down the flat
washers and brass nuts using
a 5/16-inch socket and rachet.
Do not over tighten.