We promise clear visibility of 25m.

We want children to swim in crystal clear, clean water…The pool filtration device “A-1 Filter” was developed with this desire in mind, and over the past 50 years, 15,000 units have been delivered both domestically and internationally.
With outstanding filtration accuracy that can remove even the finest particles of 1 to 5 microns, and an extensive nationwide after-sales service network, we will ensure the best pool conditions.

Benefits of installing A-1 filters

High filtration accuracy

After filtration, the water is so clear that you can clearly see the pool wall 50 meters away.
The A-1 filter uses a filtration method that uses diatomaceous earth, filtering out even the finest particles of 1 to 5 microns, achieving a level of transparency that allows you to clearly see the pool wall 50 meters away.

Clean filtration method

The A-1 filter flushes out the trapped dirt and bacteria along with the diatomaceous earth during cleaning. Then, new diatomaceous earth is poured in from the other side, forming a new filtration membrane before filtration resumes. This makes it extremely hygienic.

When cleaning a sand/ceramic filter, water is run through the bottom to rinse the filter media. After cleaning, the same filter media is used again for filtration. The same filter media can be used for 5 to 10 years before it needs to be replaced.

                    Washing with a water flow rate of approximately 1 cm/sec

Excellent water-saving effect

The fully automatic A-1 filter can save 70% of water compared to sand/ceramic filtration methods.

Save approximately 340,000 yen on your annual water bill!
Calculated based on Tokyo’s water and sewerage unit price of 642 yen/m3 (assuming monthly usage is 201m3 or more).

	Sand/Ceramic Filtration	A-1 filter
Cleaning and draining time/frequency	15 minutes/3 days	1.5 minutes/day (cold water),2 minutes/day (hot water)
Washing wastewater volume ratio	100	30/40

Lightweight and compact

The A-1 filter has been designed to be as lightweight and compact as possible. This reduces construction costs, foundation work costs, and installation costs. In addition, it also reduces construction costs when replacing the filtration equipment in the future. The A-1 filter is also easy to relocate.

1. Installation space comparison (filtration capacity 100m ³ /h treatment)

2. Comparison of loading entrance sizes

Easy operation

The fully automatic A-1 filter comes with an optional easy-to-operate touch panel control panel.