©2017 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specifications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • (336) 629-4651
MNL-TZ 22
A THERMACO® Technology
Trapzilla
®
Grease Interceptor
Installation and Operations Manual
TZ-160, TZ-400, TZ-600 Models
AFE
MNL-TZ 21
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 flat 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.
5.4 Concrete Calculations for TZ Models/Components
In order to offset the effects of buoyancy caused by groundwater (high water tables), strengthen the
sideload of the unit, and prevent movement of the unit in the event of shifting earth, Thermaco, Inc.
recommends concrete be poured around the entirety of Trapzilla
®
units installed in-ground in the amounts
of concrete specified in the table below. The concrete must to be poured continuously and completely
surrounding the Trapzilla
®
body (and Extension Collars if applicable) to ensure proper strength and
security at a compression strength of 4000 psi (C28/35).
Amount of Concrete
Trapzilla Model
Weight in lbs. (Kg)
Volume in Cubic Yards
(m
3
)
TZ-600
1975 (895)
0.50 (0.38)
TZ-400
1525 (691)
0.40 (0.31)
TZ-160
550 (249)
0.15 (0.11)
ECA-TZ-29*
600
0.20
Pictured Left:
Installation of TZ-600-ECA unit
with Built-In 18” Extension Collar
fully extended and 29” Two-Piece
Extension Collar fully extended for
a total of 47” of additional depth for
unit. Concrete should fully encircle
the unit up to the surface. A small
amount of space (up to 4”) may be
left unfilled to cover with dirt and
grass if installed outside.
WARNING: PROPER INSTALLA-
TION INSTRUCTIONS MUST BE
FOLLOWED FOR THERMACO WAR-
RANTY TO BE VALID. MAXIMUM
INSTALLATION DEPTH PERMITTED
FOR TRAPZILLA GREASE INTER-
CEPTORS AND SOLIDS SEPARATORS
IS 60” MEASURING FROM CENTER
OF INLET TO SURFACE. ANY INSTAL-
LATION DEEPER THAN THIS VOIDS
THE WARRANTY FOR THE UNIT.
CONTACT THERMACO REGARDING
INSTALLATIONS EXCEEDING THIS
DEPTH.
