Birchtree Knapsack Sprayer - 12L

12L large capacity manual knapsack backpack sprayer, ideal for garden weed killer, pesticide, fert...

Best current price£25.99from B&Q

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B&QB&Q - 12L Manual Knapsack Sprayer Garden Pressure Backpack Weed Killer Pump
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OnBuy.comBirchtree 12L Manual Knapsack Backpack Sprayer
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Product Information

Full details

The Birchtree Knapsack Sprayer - 12L is designed for homeowners and agricultural users needing efficient and large-volume spraying for gardens, allotments, and fields. Its key benefit is the generous 12-liter capacity, minimizing refills and saving time during application of weed killer, pesticides, or fertilizers. A minor caveat is that it is a manual pump, requiring physical effort for operation.

All features

Model Part NumberB555-140
BrandBirchtree

Extended Product Information

FAQs

What is the maximum capacity of the sprayer?

The sprayer has a large 12-liter capacity.

Can I use this sprayer for all types of chemicals?

It is suitable for most water-based weed killers, pesticides, and liquid fertilizers. It is not recommended for abrasive powders, highly corrosive chemicals, or flammable liquids.

How do I clean the sprayer after use?

Rinse the tank, pump, and wand thoroughly with clean water. Pumping clean water through the system is recommended to flush internal components.

Is assembly required?

Basic setup involves attaching the shoulder straps and ensuring connections are secure. The main components are typically pre-assembled.

Does this sprayer require batteries or power?

No, this is a manual pump sprayer and does not require batteries or an external power source.

What is the best way to store the sprayer?

Store in a clean, dry place away from direct sunlight and extreme temperatures, ensuring the tank is empty and dry.

Troubleshooting

Sprayer not building pressure

Check that the pump handle is securely locked down. Ensure all seals and connections are tight. Verify the air valve is not obstructed.

Leaking from the pump or tank

Inspect all seals and O-rings for damage or wear and replace if necessary. Ensure the tank cap is securely tightened.

Uneven spray pattern or low output

Clean the nozzle tip for any blockages. Check the internal filter for debris. Ensure the pump is being operated with consistent strokes.

Straps feel uncomfortable

Adjust the shoulder straps for a snug but comfortable fit. Ensure the weight is evenly distributed by adjusting the backpack position.

Pros and Cons

Pros

  • Large 12L capacity reduces interruptions
  • Backpack design for comfortable transport
  • Suitable for various garden and agricultural liquids
  • Durable for outdoor use
  • Manual operation requires no power source

Cons

  • Requires physical effort for pumping
  • Not suitable for commercial-grade, high-pressure applications
  • Manual operation can be time-consuming for very large areas
  • No integrated battery or power assist

Setup, Compatibility & Care

Setup:

  1. Ensure all components are present before first use.
  2. Attach the shoulder straps securely to the sprayer body.
  3. Fill the tank with the desired liquid, ensuring not to exceed the maximum fill line.
  4. Connect the pump mechanism and wand.

Compatibility:

This sprayer is designed for liquid applications such as water-based weed killers, pesticides, and liquid fertilizers. It is not recommended for use with abrasive powders, highly corrosive chemicals, or flammable liquids.

Care:

  • After Each Use: Rinse the tank, pump, and wand thoroughly with clean water. For best results, fill the tank partially with clean water and pump it through the system to flush internal components.
  • Storage: Store the sprayer in a clean, dry place away from direct sunlight and extreme temperatures. Ensure the tank is empty and dry before long-term storage.
  • Maintenance: Periodically check the pump seals and nozzle for wear or blockages. Clean or replace as needed.

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