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Aviation Products // Line Maintenance & Exterior Cleaning

Unblock-S
  • Fast acting formulation
  • Descales quickly and safely
  • Conforms to AMS 1640C

Description

During normal daily use aircraft, toilets carry solid and liquid wastes that form limescale, calcium and other deposits throughout the system. Callington Unblock-S has been specially formulated to deal with these build-ups and help maintain a fully functioning toilet system.

Application

Callington Unblock-S is suitable for both vacuum and re-circulating toilets. It is powerful enough for deep soaks during engineering checks and can also be used diluted in a regular cleaning cycle. 

Directions for Use

For vacuum toilets – general maintenance: Add Unblock-S neat for dilution with clean water from the flushing system. Crushed ice is not required to improve Unblock-S. Using instructions:

  1. Start the process at the most forward lavatory by putting 2 litres of Unblock-S down each toilet.
  2. Flush the toilet once.
  3. Complete this procedure for all toilets on the aircraft.
  4. Allow the cleaning solution to remain in the system for 2-4 hours.
  5. When the cleaning operation is complete add fresh water then flush/backwash to clear newly removed waste and Unblock-S.
  6. Empty the waste tank(s) to maintain full capacity and minimize weight.

Re-circulating toilets general maintenance: Use Unblock-S at 50/50 dilution with clean water. Crushed ice is not required to improve Unblock-S.

  1. Make sure that each toilet unit has been emptied.

  2. Start the process at the most forward lavatory by putting 2 litres of Unblock-S and 2 litres of 

    water down each toilet.
  3. Flush the toilet twice.

  4. Complete this procedure for all toilets on both sides of the aircraft.

  5. Flush the toilet 3 –4 times in the first hour to re-circulate Unblock-S through the toilet unit. Continue to flush at hourly intervals).
  6. Allow cleaning solution to remain in the system for 2-4 hours.
  7. When the cleaning operation is complete, drain and rinse with clean water to clear newly removed waste and Unblock-S.
  8. Empty the waste tank again before returning the toilet to service in order to maintain capacity and minimize weight. DANGER: Causes severe skin burns and eye damage.

Approvals

• AMS 1640C

Physical Properties

Appearance:               Light blue liquid      

Density at 20°C:         1.036 - 1.044g/mL       

pH:                              1 - 2                    

Odour:                         Characteristic

Ordering Info

Product CodePackaging
5120/33 2L
5120/51 20L
5120/64 200L
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