Filteration & Water Treatment

What is an effective filtering system?

The components of a pool filtering system are listed below in order of priority:

1. Sufficient number of suction - discharge sealing parts
2. An appropriate pump
3. A suitable filter
4. Suitable pipework

How to determine whether the components are suitable filtration rate? 

To make a choice compatible with the size of the pool:

The volume of a private pool must be filtered within 4 to 6 hours:

• 5 hours on average (4 hours in hot regions)
• Filtration rate = pool volume/recycling time

Flow rate Q = Pool volume/Recycling time = V m³ / 5 hours

How to determine the volume of your pool?

Reminder: measuring units and calculation

Surface in m2

Length x width L x w = S m²

Volume in m3

Length x width x height*: L x w x h = V m^{3 *height = depth}

π x Radius² x height: 3.14 x R² x h = V m³

Implemented slopes

Length x width x average height*: L x w x [(H1+H2)/2]

Pyramid trunk

Length x width x average height L x w x [(A+H)/2]

How to calculate the required flow rate?

• The flow rate is expressed in m³/h
• This represents the quantity of water which passes through the facility within 1 hour

For example:

For a pool of 10 x 5 m with a depth of 1.50 m

1. Pool Volume:

• Surface: 10 x 5 = 50m²
• Volume: 50m² x 1.50 m = 75 m³

1. Filtration rate:

• 75 m³/5 hours = 15 m³/h

It is therefore necessary to choose equipment with a filtration rate of 15 m³/h

The 3 major standard components on the pool market

Pool < 4 x 8: 50 m³ = 10 m³/h

Pool < 5 x 10: 75 m³ = 15 m³/h

Pool < 6 x 12: 100 to 110 m³ = 22 m³/h

What daily filtration time is to be used?

A pool must be filtered several times a day (not only during 5 hours)

The use is required to determine the filtration time:

Water T° / 2

Water at 24°C = filtration 12h per day – during day time (greater pollution)

For a pool of 10x5 with a depth of 1.5m, a filtration rate of 15m³/h is required to entirely filter the pool in 5h.

In summer at 24 degrees, the pool must be filtered during 12h, which means filtering the entire pool twice in a day.

In addition to the suction sealing parts and the pipework, which must allow the following volumes of water to pass through, two components are essential.

• The pump
• The filter