©2018 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-1826 17
A THERMACO® Technology
Trapzilla
®
Grease Interceptor
Installation and Operations Manual
TZ-1826 Models
AEF
MNL-TZ-1826 16
5.3 Concrete Specifications for In-Ground Installation
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).
5.4 Concrete Calculations for TZ-1826 Models/Components*
Amount of Concrete
Trapzilla Model
Weight in lbs. (Kg)
Volume in Cubic Yards (m
3
)
TZ-1826
3950
1.0
ECA-TZ-29 (each)
600
0.20
5.2 Plumbing Instructions for TZ-1826 with Optional ECA-TZ-29 Extension Collars (purchased
separately)
In some cases, TZ-1826 may be installed in locations where built-in extension collar will not reach grade.
In these cases, the two-piece ECA-TZ-29 Extension Collar (purchased separately) may be used to make
lid accessible at ground level. Follow instructions included in ECA-TZ-29 packaging for installations.
Each TZ-1826 would require two (2) ECA-TZ-29 if pipe depth requires.
* In-ground installation instructions only applicable for units installed where center of outlet pipe is
no more than 60” below grade. For all installations deeper than this, Thermaco must be contacted
to verify site conditions and provide further instructions for proper installation. Failure to abide by
this instruction will result in voiding the warranty of the unit.
In-Ground Installations inside of a building must have a vessel vent installed and piped to at-
mosphere.
Note: Drawing for reference only. Equipment must be installed in compliance with all applicable laws, regulations
and codes, including plumbing codes. Installation should be performed by a qualified plumber.
ECA-TZ-29
Two-piece extension
collar with 4-29” of
extension. Connect
bottom piece to built-
in extension collar
and use original lid
provided.
Built-in
extension
Follow instructions
on pages 18-19 to
set built-in extension
collar. When pos-
sible adjust height
of built-in extension
collar before trimming
ECA-TZ-29.
