©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 7
A THERMACO® Technology
Trapzilla
®
Grease Interceptor
Installation and Operations Manual
TZ-1826 Models
AEF
MNL-TZ-1826 6
3. Plumbing Installation
3.1 Plumbing Considerations Prior to Installation
3.1.1 Locating the Unit
The system should be visible and easily accessible for maintenance and inspection. Options are available
to install the Trapzilla in a basement, suspended from a ceiling or in-ground in an exterior location. Make
sure adequate room is provided around the unit to allow easy access for a pump truck operator. Make
sure the height above the Trapzilla access cover is enough to properly service the system.
3.1.2 Inlet/Outlet Piping
The inlet and outlet piping connections require flexible sleeve pipe couplings. Keep outlet piping as
straight as possible. Thermaco, Inc. recommends installation of Two-Way Cleanouts on both the Inlet and
Outlet of Trapzilla
Interceptors and Solids Separators in accordance with all applicable laws, regulations
and codes.
These cleanouts should match the size of the Inlet and Outlet Piping (i.e. for 4” Inlet/
Outlet piping, a 4” cleanout should be used).
Use only “sweep” connections. Do not reduce the pipe
sizing on the outlet piping. Do not install “P” trap on outlet connection of system. (Note: The system
already has a internal gas trap)
3.1.3 Flow Controls
Trapzilla systems are supplied with a Low-Head Flow Control module (LHFC). This should be connected
to the inlet of the Trapzilla unit in situations where flow rate needs to be restricted to the ASME rated
flow or when vented flow control is required by local code.
3.1.4 Venting the Outlet
An outlet vent or approved air admittance valve of at least 1/2 the diameter of the system’s outlet
connection must be present as close as possible to the Trapzilla outlet to prevent possible siphonage
problems. The Vent on the Outlet piping is to be installed in accordance with all applicable laws,
regulations and codes. Failure to provide a vent for the system voids Thermaco’s Limited Warranty for
the system.
3.1.5 High Head Height Applications Over Six (6) Feet (1.95 m)
For installations where there is head height of greater than 6 feet (1.95 meters), Thermaco, Inc.
recommends installation of a code-approved Vented Flow Control Assembly (Thermaco VFCA not
included with Trapzilla).
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.
3.2 Vessel Vent Connection
Venting of the Trapzilla tank is recommended by the manufacturer and required for in-door installations.
• Vent the tank through the provided 2” NPT threaded connector on the side of the tank (This vent may
be located above the outlet or on the side of the tank depending on model).
• Remove and discard the plug and connect appropriate vent lines as indicated below (for 2” vent
connection, use 2” pipe).
1
1
2
2
3
3
4
4
A
A
B
B
C
C
D
D
THIS DRAWING CONTAINS PROPRIETARY AND PATENTED MATERIAL. THIS DRAWING MAY NOT BE REPRODUCED IN WHOLE OR PART WITHOUT
WRITTEN CONSENT FROM THERMACO, INC. POSSESSION OF THIS DRAWING DOES NOT CONSTITUTE THE RIGHT TO MANUFACTURE.
POSSESSION OF THIS DRAWING DOES CONSTITUTE AN IMPLIED NONDISCLOSURE AGREEMENT BETWEEN THERMACO, INC. AND THE HOLDER OF
THIS DRAWING. DO NOT DESTROY THIS DRAWING, IT IS THE SOLE PROPERTY OF THERMACO, INC. AND MUST BE RETURNED UPON REQUEST.
MATERIAL (UNLESS NOTED)
FINISH (UNLESS NOTED)
646 GREENSBORO STREET
PO BOX 2548, ASHEBORO, NC 27203
VOICE 336-629-4651 FAX 336-626-5739
Decimals
.XX +/- .03
.XXX +/- .015
Unless otherwise specified
Dimensions are in inches
Tolerances
Angular
+/- 1°
CHECKED
SIZE
REV. NO.
DWG NO.
PART NO.
C
SCALE
RELEASE DATE
SHEET OF
ENGINEERING
DRAWN
DATE
THIRD ANGLE PROJECTION
Vessel Vent Connection
Can be connected to the outlet vent,
facility vent, or independently vented to
atmosphere
