Netafim Arkal 2” Spin-Klin Compact Stand Alone Filter Installation And Operation Instructions Manual page 16

Cleaning Recommendations for Clogged Filtration Discs
Water-formed deposits may cause clogging of the filter discs. The formation of these deposits depends on
the quality of the filtered water and environmental conditions like temperature, pH, light, duration of
filtration and more.
Common water-formed deposits are:

Biological or organic deposits (mostly mucous or oily to the touch, beige, brown or green in color)

Iron oxide (rust) or other metal oxides

Carbonates (white or gray deposit)

Combinations of the above
If these deposits cannot be eliminated by pretreatment of the water, we recommend the following
cleaning procedure:
Material and Equipment

A well ventilated working place.

2 small containers (1 liter), 2 large containers (15 liter) and a stirring stick, all resistant to chemicals,
preferably of polypropylene.

Plastic rope to tie up the disc.

Sodium Hypochlorite NaOCl - Strong oxidizing liquid, commercial concentration: 10%. Oxidizes and
removes organic and biological deposits.

Hydrochloric Acid HCl - Very corrosive liquid, commercial concentration: 30%. Dissolves and removes
carbonates, iron oxide, and other deposits.

Safety equipment: safety glasses, gloves, long pants, long sleeved shirt and shoes.
ATTENTION!
While working with chemicals protect yourself with the necessary safety equipment:

Safety glasses, gloves, protective clothing

Work in a well ventilated area

Follow the manufacturer's instructions
Cleaning Organic and Biological Deposits

Open the filter and remove dirty discs. Attention – Never open the filter before the pressure has
been released.

Arrange the discs loosely on the plastic rope

Prepare a 5% Sodium Hypochlorite solution:
1. Pour 5 liters of water into one of the large containers.
2. Add 5 liters of Sodium Hypochlorite (10%) into the water.

Soak the discs in the solution so that both sides are covered. To achieve maximum cleaning, agitate
the discs several times with a stirring stick.

Contact time with cleaning solution: up to 8 hours

Remove the discs carefully from the solution, put them in the second large container and rinse them
very well with clean water before placing them back in the filter.

We recommend flushing the cleaned discs again in the filter to ensure that all chemical residues are
removed.
The cleaning solution can be used for several sets of discs. As the cleaning activity of the solution
deteriorates, it may be necessary to soak the discs for a longer time.
2" Spin Klin