©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 11
50000 Series
Big Dipper
®
IS System
Plumbing Installation
Sometimes space restrictions require the installation of Big Dipper units in basement locations where significant
head pressure becomes a factor. The Big Dipper
®
VFCA Vented Flow Control
module provides an option for use
with installations where a significant amount of head pressure is present (greater than 6 ft./1.95 m) or where ap-
plicable regulations require vented flow controls. A Vented Flow Control helps reduce problems associated with
high head pressure and helps slow the drainwater flow down. The VFCA kit contains an appropriate fitting and
flow control orifice.
VFCA-20 Vented Flow Control for W-200-IS
VFCA-25 Vented Flow Control for W-250-IS
VFCA-35 Vented Flow Control for W-350-IS
VFCA-50 Vented Flow Control for W-500-IS
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
Installations where head
height is greater than 6 feet
(1.95 m)
Big Dipper
®
IS Unit
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.
Drainage Piping
from Kitchen
Flow Control Vent/Air Intake
(Note: Flow Control Vent may be connected to
atmosphere vent, facility vent, or code-approved
air admittance valve.
*
To be installed above
sink flood rim.)
Outlet Vent
(Note: Vent may be facility vent
connection or code-approved air
admittance valve
*
)
Installation in high head height
locations requires removal of the
Internal Flow Control (small rub-
ber cap under no-hub coupling
over the Inlet).
*
Air Admittance Valves are not permitted in
some locations such as Massachusetts. Check
local plumbing code to determine if they are
permitted by state or local plumbing code.
