
INSTRUCTION MANUAL
AUTO DRAIN
AUTOMATIC MOISTURE DRAIN
FOR THE 091-9-12V AUTO PUMP
File: IM_091-9-131_reva.indd
Rev: A
Revised By: MFG
Date: 10-28-2013
170 Cherry Avenue
West Sayville, NY 11796
www.kussmaul.com
MODEL #: 091-9-131
INPUT: 12 Volts DC
1 YEAR WARRANTY
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device for more information
Ph: 800-346-0857
Fax: 631-567-5826
sales@kussmaul.com

INTRODUCTION
The Auto Drain system consists of a 12 volt normally open solenoid, a filter and assorted fittings. Designed to work with the Auto Pump 12V, the solenoid bleeds the filter bowl when the
pump is not running. As soon as the pressure switch turns on the compressor, the solenoid
is energized and the bleed is closed. A check valve is installed on the Auto Drain assembly
to seal off the vehicle’s air pressure when the bleed valve opens.
NOTES AND COMPONENTS
I. COMPONENTS OF THE AUTO DRAIN ASSEMBLY
ITEM QUANTITY PART NUMBER DESCRIPTION
1. 1 A2211-S18 Solenoid Valve, 12 volts D.C., normally open
2. 1 F5044-02-DH-Z310 Filter, with metal bowl
3. 1 216P-2 Nipple, 1/8 NPT Close
4. 1 219-P-2 Plug, 1/8 NPT
5. 1 219-P-4 Plug, 1/4 NPT
6. 2 1202P4-4 Street elbow, 1/4 NPT
7. 1 PL1/4-NIUT Elbow, 1/8 NPT, male - 1/4 tube
8. 1 CMMQ20-B Check Valve, 1/4 NPT male -1/4 NPT male
9. 1 PLB101-4 Tee, brass, 1/4 NPT
10. 1 PVC-1/4 Sleeving, 1/4” PVC, 11 inches
11. 2 PLB112-4 Nipple, 1/4 NPT, Close
12. 1 PVC-105-5CL #5 Tubing, 24” Clear
II. NOTES
1. Install pressure switch on Auto Drain before installing Auto Drain on pump.
2. It may be necessary to slightly rotate solenoid valve by turning Filter Bowl to clear pressure
switch when installing.
3. Remember to tighten Filter Bowl rmly after Pressure Switch is installed.
170 Cherry Avenue
West Sayville, NY 11796
www.kussmaul.com
Ph: 800-346-0857
Fax: 631-567-5826
sales@kussmaul.com
2

INSTALLATION INSTRUCTIONS
I. WIRING OF THE AUTO DRAIN TO THE AUTO PUMP 12V
1. Connect the Auto Drain solenoid wires to output terminals of pressure switch. These are the same
terminals that supply power to the Auto Pump 12V motor.
2. The Auto Drain is now properly connected. Test by bleeding system pressure to start Auto Pump
12V and note that when pump shuts down, air and moisture will bleed out of drain tube.
3. Position drain tube to direct moisture to exterior of vehicle.
II. WIRING DIAGRAM
170 Cherry Avenue
West Sayville, NY 11796
www.kussmaul.com
Ph: 800-346-0857
Fax: 631-567-5826
sales@kussmaul.com
3

INSTALLATION RECORD
DATE INSTALLED _______________________________________________________
INSTALLED BY _________________________________________________________
VEHICLE IDENTIFICATION _______________________________________________
VEHICLE OWNER _______________________________________________________
WARRANTY POLICY
All products of Kussmaul Electronics are warranted to be free of defects of material
or workmanship. Liability is limited to repairing or replacing at our factory, without
charge, any material or defects which become apparent in normal use within 1
year from the date the equipment was shipped. Equipment is to be returned,
shipping charges prepaid and will be returned, after repair, shipping charges paid.
Kussmaul Electronics shall have no liability for damages of any kind to associated
equipment arising from the installation and/or use of the Kussmaul Electronics
products. The purchaser, by the acceptance of the equipment, assumes all liability for any damages which may result from its installation, use or misuse, by the
purchaser, his or its employees or others.
170 Cherry Avenue
West Sayville, NY 11796
www.kussmaul.com
Ph: 800-346-0857
Fax: 631-567-5826
sales@kussmaul.com
4