Product Manual

ManualsBrandsNorthStar ManualsLawn & GardenNSQ Series 12V On-Demand Sprayer Diaphragm Pump — 3 GPM

Installation

Step One: Mounting

• This NorthStar pump is self-priming.

• The pump should be located in an area that is dry and provides adequate ventilation.

• The pump may be mounted in any horizontal position. If mounting the pump vertically, the

pump head should be in the down position so that in the unlikely event of a leak, fluid will not

enter the motor.

• Secure the rubber feet with #10 fasteners (1/4" fasteners for models 2687061 and 2687062). DO

NOT compress the feet, doing so will reduce their ability to isolate vibration/noise. (Note:

fasteners are not included.)

Step Two: Plumbing

• See table below for port size and recommended hose sizes.

o Remove shipping plugs from pump ports.

o Use plastic male NPT (Tapered pipe thread) fittings to connect flexible high-pressure tubing

to the NPT ported pumps.

o Use NorthStar quick connect fittings to connect flexible high pressure tubing to the quick

connect ported pumps.

o To insert quick connect fittings, lubricate O-ring with water and twist fitting while inserting

into pump port.

Pump Model

Ports

Minimum inlet hose size

Minimum outlet hose size

2681042

3/4" Quick Connect

3/8" (9.5mm) Inside diameter

2682271

3/8" Female NPT

1/2" (13mm) Inside diameter

3/8" (9.5mm) Inside diameter

2682272

3/4" Quick Connect

1/2" (13mm) Inside diameter

3/8" (9.5mm) Inside diameter

2683061

1/2" Female NPT

1/2" (13mm) Inside diameter

2683062

3/4" Quick Connect

1/2" (13mm) Inside diameter

2684061

1/2" Female NPT

1/2" (13mm) Inside diameter

2684062

3/4" Quick Connect

1/2" (13mm) Inside diameter

2685561

1/2" Female NPT

1/2" (13mm) Inside diameter

2685562

3/4" Quick Connect

1/2" (13mm) Inside diameter

2687061

1/2" Female NPT

3/4" (19mm) Inside diameter

2687062

3/4" Quick Connect

3/4" (19mm) Inside diameter

26811102

3/4" Quick Connect

3/8" (9.5mm) Inside diameter

26815151

3/8" Female NPT

3/8" (9.5mm) Inside diameter

26815152

3/4" Quick Connect

3/8" (9.5mm) Inside diameter

NOTE: NorthStar does not recommend the use of metal fittings or rigid pipe to plumb the inlet/outlet ports.

Standard plastic threaded fittings are available by calling NorthStar Product Support at 1-800-270-

0810.

• In some cases, the ports may require a suitable thread sealer applied sparingly. DO NOT over-

tighten; maximum torque is 45 in.-lb [5 N-m].

• Tubing should be compatible with the spraying fluid. At least 18" [450mm] length is suggested

to minimize stress on the fitting/ports and reduce noise. Allow for the shortest possible tubing

route and avoid sharp bends that may kink over time.

• Installation of a 50-mesh strainer is recommended to prevent foreign debris from entering the

system. Failures due to foreign debris are not covered under the warranty.

NOTE: Restrictions on the inlet may cause a loss in performance. Inlet pressure must not exceed 30 psi [2.1

bar]

• If a check valve is installed in the plumbing, it must have a cracking pressure of no more than 2

psi [.14 bar].

CAUTION

DO NOT locate the motor near low temperature plastics or combustible material. The surface temperature of

the motor may exceed 250°F [121°C].

CAUTION

Sealers and Teflon tape may act as lubricant causing cracked housings or stripped threads due to over

tightening. Care should be used when applying sealers; it may enter the pump inhibiting valve action, causing

no prime or no shut-off. Failures due to foreign debris are not covered under the warranty.