Greywater filter IISI H4

IISI H4 grey water filter – easy and hassle-free grey wastewater treatment

The IISI H4 greywater filter is an efficient and maintenance-free solution for greywater treatment in holiday homes. It cleans up to 500 liters of washing water per day biologically and completely without electricity, chemicals or replaceable parts. Greywater flows through the filter by gravity, and a separate filtration field is not required – saving you space, money and effort.

Reliable cleaning process – no chemicals or electricity

The IISI H4 effectively purifies greywater using biological filtration based on large surface area and microbial activity. The water simply flows through the system by gravity. Grease, solids and impurities are effectively separated without the need for complex techniques.

Unlike many other systems, there is no need for an electrical connection, chemicals or replaceable filter media. The filter surface inside is washed about 1-⁠2 times a year – no replacement, no peat, no pumps.

Easy to install on almost any plot

The IISI H4 greywater filter is lightweight, easy to handle and quick to install. The self-anchoring design makes it a particularly easy choice, and the soil quality does not impose any restrictions. Since the height difference between the inlet and outlet is only 35 cm, the system is particularly suitable for sloping plots or those with limited space.

Purified water can be directed directly into a ditch, rock pit, or directly into nature – without the need for an absorption or filtration field.

Particularly suitable for leisure use

Cleaning grey water in a holiday home has never been easier. The IISI H4 is suitable for applications with a shower, sink or dishwasher. It is designed to withstand both continuous and intermittent use, making it equally suitable for weekly villas as for occasional cottage visits.

Its suitability for coastal areas and areas with stricter cleaning requirements makes it a safe choice for environmentally sensitive sites.

Durable construction and long service life

The filter is made of high-quality polyethylene plastic, which is resistant to wear and corrosion. Its lightweight construction makes it easy to transport and handle. The material is completely maintenance-free, and the device is designed to be a long-term investment with no hidden costs.

Why choose IISI H4 grey water filter?

• Biological cleaning without electricity or chemicals
• No filter field – less work and costs
• Lightweight and easy to install in almost any soil
• Purifies up to 500 L of washing water per day
• Especially suitable for cottages and holiday homes
• Maintenance-free – filter is washed, not replaced
• Also suitable for coastal areas and strict regulations
• Durable, corrosion-free construction