©2015 Thermaco, Inc. All rights reserved • Patented/Patents Pending • Specifications subject to change without notice
Thermaco, Inc. • 646 Greensboro St. • Asheboro, N. C. 27204-2548 • Phone (336) 629-4651
MNL-ISPS50000 10
50000 Series
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
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
Big Dipper
®
IS System
Plumbing Installation
The following drawings show proposed venting for Big Dipper units in various situations. Check state or local
plumbing code to determine proper installation for your facility.
Sites with Upstream Facility Vents
Sites using facility vents upstream of the Big Dipper unit do not require the use of a vessel vent. In this case,
the open inlet design of the unit works in conjunction with the facility vent and upstream P-trap to facilitate air
movement into and out of the interior grease interceptor air space and prevents air bound conditions from occur-
ing.
Sites without Upstream Facility Vents or Other Air Relief
Installations without Upstream Facility Vents or other Air Relief require the use of the vessel vent (also referred to
as a chamber vent) to prevent air bound conditions. Thermaco provides a 1” NPT connection by which this vent
may be connected to the unit and connected to the facility vent.
INCOMING FLOW
P-TRAP
FACILITY
VENT
FACILITY
VENT
OUTGOING FLOW
INCOMING FLOW
OUTGOING FLOW
VESSEL VENT
FACILITY
VENT
TIE-IN
