Model 20 SS Compact Airless Foamer

Lafferty Equipment Manufacturing, LLC

Installation & Operation Instructions

Model # 969621-B · Model 20 SS Compact Airless Foamer

Requirements

Water Temperature up to 180°F
Pressure Washer 2.2 - 5.5 GPM
Supply Hose 3/8" ID minimum

Options

Pressure Washer Hose & Trigger Gun
HP 3/8" x 50' Hose & Trigger Gun Kit# 807069
Additional Bottles
Bottle, 32oz (Includes Solid Lid)# 709082
Unit Storage Rack
Compact Foamer/Sprayer Rack, Stainless Steel# 224301
969621-B
Lafferty Equipment Logowww.laffertyequipment.com
501-851-2820
Warning! Read All Instructions Before Using Equipment!

Overview

Designed for 2.2–5.5 GPM pressure washers. The Model 20 Stainless Steel Compact Airless Foamer is an airless foam applicator for quickly diluting and applying foaming chemicals. This venturi unit draws chemical concentrate from the attached bottle and blends it into the water stream to create an accurately diluted solution. The solution flows through the airless foam wand which draws in atmospheric air to create and project wet, clinging foam on to surfaces up close or at distances up to 25 feet with interchangeable fan and zero degree nozzles.
Lafferty Equipment Manufacturing, LLC • 5614 Oak Grove Road • North Little Rock, Arkansas 72118

Safety & Operational Precautions

  • For proper performance do NOT modify, substitute nozzle, hose diameter or length.
  • Manufacturer assumes no liability for the use or misuse of this unit.
  • Wear protective clothing, gloves and eye wear when working with chemicals.
  • Always direct the discharge away from people and electrical devices.
  • Follow the chemical manufacturer's safe handling instructions.

To Install (refer to diagram on next page)

  1. Remove the rinse nozzle and quick connect the airless foamer to your trigger gun. (1/4" quick connect).
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OVERVIEW & SETUP VIDEO 
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Set the chemical dilution ratio by threading one of the color coded metering tips into each chemical check valve. See chemical labels for dilution ratio recommendation or consult your chemical supplier.

  • For the strongest dilution ratio do NOT install a colored metering tip.
  • The dilution ratios in the metering tip chart are based on water thin chemicals with a viscosity of 1CPS.
  • Thicker chemicals will require a larger tip than the ratios shown in the chart.
  • Application results will ultimately determine final tip color.
  • Select the tip color that is closest to your desired chemical strength and thread it into the tip holder. DO NOT OVER-TIGHTEN.
  • Push the chemical tube over the check valve barb and place the suction tube in the chemical concentrate.
  • If necessary, cut suction tube(s) to length before attaching suction strainer.

To Operate

  1. Unscrew the bottle and install the selected colored metering tip, add chemical concentrate to the bottle and re-attach. Do not over tighten.
  2. Quick connect to the trigger gun.
  3. Direct the discharge in a safe direction. Pull the trigger to begin application.
  4. Make final metering tip adjustments based on application results. Try the next larger sized metering tip until the results are acceptable.
  5. When application is complete, release the trigger.
  6. To rinse, quick disconnect the unit from the gun, rinse before the chemical dries.

NOTE: Foaming models (not sprayers) include two nozzles. The fan nozzle provides a wide pattern for faster coverage. The 0° nozzle provides increased foam throw distance. Install the preferred nozzle in the end of the foam wand.

Metering Tip Selection
Metering Tip Color
Dilution Ratio at GPM
2.5 3.0 3.5 4.0 4.5 5.0 5.5
Brown		 571:1 686:1 800:1 914:1 1029:1 1143:1 1257:1
Clear		 364:1 436:1 509:1 582:1 655:1 727:1 800:1
Bright Purple		 232:1 278:1 325:1 371:1 417:1 464:1 510:1
White		 149:1 179:1 208:1 238:1 268:1 298:1 327:1
Pink		 109:1 131:1 153:1 175:1 197:1 218:1 240:1
Corn Yellow		 83:1 100:1 117:1 133:1 150:1 167:1 183:1
Dark Green		 66:1 79:1 92:1 105:1 118:1 131:1 144:1
Orange		 55:1 67:1 78:1 89:1 100:1 111:1 122:1
Gray		 53:1 64:1 75:1 85:1 96:1 106:1 117:1
Light Green		 46:1 55:1 64:1 73:1 82:1 91:1 100:1
Med. Green		 40:1 48:1 56:1 64:1 71:1 79:1 87:1
Clear Pink		 34:1 41:1 48:1 54:1 61:1 68:1 75:1
Yellow Green		 28:1 33:1 39:1 45:1 50:1 56:1 61:1
Burgundy		 27:1 32:1 38:1 43:1 48:1 54:1 59:1
Pale Pink		 23:1 28:1 32:1 37:1 42:1 46:1 51:1
Light Blue		 21:1 25:1 30:1 34:1 38:1 42:1 46:1
Dark Purple		 18:1 21:1 25:1 29:1 32:1 36:1 39:1
Navy Blue		 13:1 15:1 18:1 20:1 23:1 25:1 28:1
Clear Aqua		 11:1 13:1 16:1 18:1 20:1 22:1 25:1
Black		 6:1 8:1 9:1 10:1 12:1 13:1 14:1
No Tip Ratio Up To: 5:1    5:1    6:1     7:1 8:1    9:1    10:1   
The dilution ratios above are approximate values. Due to chemical viscosity, actual dilution ratios may vary.
969621-B.jpg
Troubleshooting Guide
Problem Possible Cause / Solution
StartupMaintenance
A) Unit will not draw chemical.
B) Does not foam properly
C) Using too much chemical
1, 2, 3
1, 2, 4, 5, 6
6		 7, 8, 9, 10
7, 8, 9
Possible Cause / Solution
StartupMaintenance
  1. GPM too low
    • See requirements.
  2. Water inlet clogged
    • Clean the water inlet. DO NOT DRILL OUT
  3. Chemical tube not immersed in chemical or depleted
    • Immerse tube or replenish.
  4. Ensure chemical is recommended for foaming and/or the application
    • See chemical manufacturer.
  5. Dilution too weak / Chemical is very thick.
    • Install larger metering tip or remove metering tip.
  6. Dilution too strong / No metering tip installed or wrong metering tip installed
    • Install a metering tip or install a smaller metering tip.
  1. Tip holder, clogged or loose.
    • Clean or tighten.
  2. Chemical strainer or metering tip blocked
    • Clean or replace chemical strainer and/or metering tip.
  3. Chemical tube stretched out where tube slides over tip holder or pin hole/cut in chemical tube (sucking air in) which reduces chemical intake
    • Cut off end of tube or replace tube.
  4. Hard water scale or chemical build-up may have formed in the foamer body/wand causing poor or no chemical pick-up​​​​​​​
    • Follow Preventive Maintenance instructions below, using hot water and/or descaling acid. When there is no draw at all, carefully remove inlet fitting and chemical check valve. Soak foamer body in de-scaling acid.
PREVENTIVE MAINTENANCE: When the unit will be out of service for extended periods, place chemical tube(s) in water and flush the chemical out of the unit to help prevent chemical from drying out and causing build-up. Periodically check and clean chemical strainer and replace if missing.