Set Up For Chemical Spray (If Desired) - North Star 157121 Owner's Manual

the nozzle at low pressure. (Air in the hoses can
cause damage to the pump, so always make sure all
the air is out of the hoses before starting the
pressure washer engine.)
Make sure the water supply hose is not kinked. A
•
kinked hose will provide insufficient water supply to
the pump and reduce its life. Make sure the hose
remains unkinked after moving the pressure washer.

Set Up for Chemical Spray (if desired)

Prepare for Chemical Spray (if planning to
use)
Using the proper cleaning chemical for the application
can speed up cleaning jobs tremendously.
Your pressure washer is equipped with a chemical
injection point on the downstream side of the pump for
introducing cleaning chemicals into the water stream. A
braided chemical hose is provided to connect at this
point. Suction pressure at this connection automatically
draws the chemical solution in through the hose, mixing
in 1 part chemical to 15 parts water. Adequate suction
pressure is created only when the low pressure (black)
spray nozzle is used.
The introduction of cleaning chemicals via the chemical
injection point affords the following advantages:
It protects the pump from damage because no
•
chemical passes through the pump.
It mixes the cleaning chemical into a low pressure
•
spray. Cleaning chemicals applied under low
pressure adhere better to the surface being
cleaned, allowing the formula time to react and
remove dirt more effectively.
Note: An external upstream chemical injector is not
recommended for use with this pressure washer,
and if used would obviously alter the 15-to-1
dilution ratio and may cause pump damage.
CAUTION
Chemicals Containing Muriatic Acid
Certain chemicals, such as bleach or those containing muriatic
acid, will cause pump damage if introduced upstream through
the pump's water inlet. Use of chemicals not intended for
pressure washers will void pump warranty.
Operation
• Never spray acids, corrosives, or abrasive or flammable
liquids. Breathing hazards, surface burns/corrosion, or
fire/explosion could result.
• Follow the chemical manufacturer's label instructions for
proper use and handling of the chemical. Understand all safety
hazards and first aid for all chemicals being used. Always wear
protective gloves when handling and cleaning with chemicals,
and wear other protective gear as directed by chemical
manufacturer. Always dispose of hazardous fluids per local,
state, and national guidelines.
Acquire Cleaning Chemical
Use only approved pressure washer chemicals or
chemicals specifically formulated for use with pressure
washers.
Non-approved chemicals can damage pressure
washer components (seals, wand, hoses, pump, etc.)
and be harmful to the environment.
Prepare for Chemical Spray (If Planning to Use)
Prepare the pressure washer for chemical spraying
using the following steps:
1. Prepare (dilute) chemical cleaning solution as
required for the job.
Note: the chemical solution will be automatically
mixed with the water at a ratio of 15 parts water to
1 part chemical solution.
2. Press the braided chemical hose over the chemical
injector on the pump.
3. Submerge the suction strainer connected to the
braided chemical hose into a bucket containing the
chemical solution.
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WARNING
Chemical Spraying
CAUTION
Non-approved Chemicals