I'm choosing a filter+pump to buy and after some research about what I need here looks like something between 7000L/h to 10000L/h would be ok. So a user suggest me this pump+filter http://www.swimpools.eu/article.php?query=28648gs|29058|zwd1007 but I was thinking to buy it here in Portugal or Spain and we it is easier to get GRE products here and I find the following three products:
1)SAND FILTER D.430 + PUMP 230W GRE. FA6070 - 386,50 €
- Ø de la cuba 430mm.
- 7.000 L/h.
- Pump power 230W – 0,31CV/HP.
- Sand ±68kg.
- 6 valve mode: lavado(clean filter), enjuague(other kind of clean the filter), filtración(filtrar), recirculación(direct from pump to pool), vaciado(from pump to waste) y cerrado(close).
2)SAND FILTER D.500 + PUMP 630W GRE. FA6080 - 435,00 €
- Ø de la cuba 500mm.
- 8.000 L/h.
- Pump power 630W – 0,86CV/HP.
- Sand ±90kg.
- 6 valve mode: lavado(clean filter), enjuague(other kind of clean the filter), filtración(filtrar), recirculación(direct from pump to pool), vaciado(from pump to waste) y cerrado(close).
3)SAND FILTER D.500 + PUMP 550W 8m3/h Gre - 321,80 €
- Ø de la cuba 500mm.
- 8.000 L/h.
- Pump power 550W – 0,75CV/HP.
- Sand ±85kg.
- 5 valve mode: lavado(clean filter), enjuague(other kind of clean the filter), filtración(filtrar), vaciado(from pump to waste) y cerrado(close).
Between 2 and 3 is easier to choose, they have the same system flow, the number 3 is more efficient, is cheaper but doesn'g have circulation mode (by the way, do I really need it?)
BUT the number 1 have all the things, use less than 50% power compared to 2 and 3, the cost is between the two and only have less 1000l/h. How the number one is so efficient? Isn't power and system flow proportional?
1)SAND FILTER D.430 + PUMP 230W GRE. FA6070 - 386,50 €
- Ø de la cuba 430mm.
- 7.000 L/h.
- Pump power 230W – 0,31CV/HP.
- Sand ±68kg.
- 6 valve mode: lavado(clean filter), enjuague(other kind of clean the filter), filtración(filtrar), recirculación(direct from pump to pool), vaciado(from pump to waste) y cerrado(close).
2)SAND FILTER D.500 + PUMP 630W GRE. FA6080 - 435,00 €
- Ø de la cuba 500mm.
- 8.000 L/h.
- Pump power 630W – 0,86CV/HP.
- Sand ±90kg.
- 6 valve mode: lavado(clean filter), enjuague(other kind of clean the filter), filtración(filtrar), recirculación(direct from pump to pool), vaciado(from pump to waste) y cerrado(close).
3)SAND FILTER D.500 + PUMP 550W 8m3/h Gre - 321,80 €
- Ø de la cuba 500mm.
- 8.000 L/h.
- Pump power 550W – 0,75CV/HP.
- Sand ±85kg.
- 5 valve mode: lavado(clean filter), enjuague(other kind of clean the filter), filtración(filtrar), vaciado(from pump to waste) y cerrado(close).
Between 2 and 3 is easier to choose, they have the same system flow, the number 3 is more efficient, is cheaper but doesn'g have circulation mode (by the way, do I really need it?)
BUT the number 1 have all the things, use less than 50% power compared to 2 and 3, the cost is between the two and only have less 1000l/h. How the number one is so efficient? Isn't power and system flow proportional?