RS18A - 18 Litre

This knapsack sprayer is manufactured with a rigid polypropylene tank and fitted with EPDM chemical resistant seals which will allow you to spray alkaline and neutral chemical products. Due to the unique design of our RS range, the tank can be pressurised to 6 BAR (88psi) which is double the working pressure of the vast majority of other sprayers.

Special features of the RS185A sprayer:

• Ergonomically formed shut-off valve
• EPDM seals giving high resistance to base products
• Filling cap with integrated measuring cup and captive loop
• Large base giving a safe footing even on an uneven surface
• Extra large opening for easy filling
• Compression pump lever can be installed on left or right side

(Note: Unlike our RS125 and RS185 models, this alkaline sprayer does not include a pressure gauge due to potential chemical compatibility)

• Empty Unit Weight: 5kg
• Maximum Operating Pressure: 6 BAR (87 psi)
• Tank Fill Capacity: 18 litres
• Total Tank Capacity: 20 litres
• Tank Ullage: 2 litres
• pH Range: 7 - 14*
• Filling: Integrated filling cap with filter
• Tank Material: Polypropylene
• Carry Position: Back (70mm padded shoulder carrying straps & back padding)
• Maximum Flow: 1.4 litres/min @ 6 BAR
• Hose Length: 1.5-metres reinforced with fabric insert
• Lance: Plastic 500mm, chemical resistant
• Nozzle: Flat jet, chemical resistant
• Seals: EPDM that are resistant to solvents and is mainly
  resistant to base products (alkaline). Generally, EPDM does not have a
  high resistance to polycarbon based oils and to fuels.

This will give you an indication of the chemical resistance of this sprayer. Next to each item you will see either YES (resistant), CON (conditionally resistant) or NO (unsuitable). This is only a guide but
if you can't see the chemical you plan to use or have any questions then please just contact us.

Acids

• Acetic Acid (maximum 10%): YES
• Silicic Acid: YES
• Peracetic Acid (maximum 6%): NO
• Phosphoric Acid (maximum 30%): YES
• Nitric Acid (maximum 10%): CON
• Hydrochloric Acid (maximum 10%): NO
• Aulphuric Acid (40%): NO

Alcohol

• Butanol: YES
• Ethanol: YES
• Methanol: YES
• Isobutanol: YES
• Isporopanol: YES

Aliphatic Hydrocarbons

• Decane: NO
• N-Heptane: NO
• N-Butane: NO

Aromatic Hydrocarbons

• Naphtha: NO
• Toluol (maximum 40%): NO
• Xylene: NO
• Heptaphene: NO

Oils

• Diesel: NO
• Kerosene: NO
• Mineral Oil: NO
• Petroleum Spirit: NO
• Concrete Release Agent: NO

Alkalines

• Acetone: CON
• Ammonia: CON
• Sodium Carbonate: YES
• Sodium Hydroxide (maximum 30%): YES
• Potassium Hydroxide: YES
• Sodium Hypochorite (maximum 12.5%): NO

Various

• Weed Control: YES
• Moss KIller: CON
• Forestry: CON
• Release Agents: CON
• Lawn Care: YES

Operating Booklet RS18A (pdf)

Can this sprayer be used with all types of alkaline cleaners?

We can't guarantee that this sprayer is compatible with any type of liquid just because it is alkaline. Please remember that it is not just the pH that determines which sprayer can be used but the active ingredients. We therefore recommend that if there is any uncertainty then send us the safety data sheet (MSDS) for the product you wish to use and we will check compatibility. If the product is not compatible then we will recommend an alternative sprayer for you.

What does Tank Ullage mean?

Ullage is the name given to the gap between the maximum fill and the total tank capacity. It is important with sprayers as the larger the ullage is then the more space there is for compressed air. The more compressed air you have then the longer spraying time you have before you run out of pressure. Given the design of a knapsack sprayer the ullage is not as important as with a compression sprayer which is why, generally, knapsack sprayers will have a smaller ullage to tank capacity ration than a compression sprayer.

Can this sprayer be used with your long telescopic lances?

Yes. This sprayer can be used with both our 2.5 metre, 3.2 metre and 5.4-metre telescopic lances. We have included these lances in the accessories list and they include any required connectors.

What guarantee do I get with this sprayer?

You get a full 12 months with mechanical breakdowns so, providing that the sprayer is being used as intended, then if something snaps you
tell us and we replace the part for you. If it's damage caused by a chemical compatibility issue then we will cover the damage providing that we have confirmed the chemical compatibility with the sprayer. When it comes to the availability of spares, this is guaranteed for 20 years from the date of purchase.