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Recirculation times and supply capacity in cubic meters per hour (mc/h) of an electric pump for private, semi-public and pubblic pools
Swimming pool pumps on Pippohydro.com
One of the most important things to consider is the size of your pool.
The swimming pools are divided into four categories:
1) Type A: open pools to identifiable users (with or without payment of admission ticket).
The type A pool is divided into three sub-categories:
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Type A1: public swimming pools (municipal swimming pools).
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Type A2: pools used in public buildings like hotels, restaurants, resorts, residences.
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Type A3: pools for sports or aquatics games.
2) Type B: condominium swimming pools, for the exclusive use of the residents and their guest.
3) Type C: pools for rehabilitative and curative use, placed within preparatory structures (nursing homes and rehab centres).
4) Type D: Swimming pools for single-family, two-family, three-family and four-family apartments.
How to choose the best pool pump?
The entire operation of circulation and filtration depends on the swiming pool pump, and without it the water will get stagnant.
The tables of the electric pumps on www.pippohydro.com indicate the total capacity of the pool according to the different types.
That said, an electric pump that serves a private pool can also serve a public pool, simply halving the capacity of the private pool shown in the table. In the same way, a public swimming pool pump can be used in a private pool, doubling the pool capacity.
The water circulation pumps for swimming pools must satisfy the design capacity of their plant. You always must taking into account the pressure losses generated by the filter that requires backwashing. In pools of type A and B the electric pumps and the filters must be of the same number. An additional backup pump (that can be connected to each filter) must also be installed. Each pump must be equipped with: inlet and outlet shut-off valve, pressure gauge in outlet, and, if necessary, non-return valve in outlet.
The recirculation time is the necessary time to be recirculation the totality of the water in a pool through the filtration system. It is obvious to say that the lower the recirculation time, the greater the quality of the filtration. Both because the volume of water will pass several times in the filter and therefore this will be cleaner, but also because you will have less particles (leaves, dust, etc.) that once they fall on the surface of the water, they will not have time to go to the bottom.
The recirculation time, indicated by the UNI standard for private swimming pools, varies from a minimum of 4 hours to a maximum of 6 hours (the expressed times indicate the time within which the entire volume of water must circulate in the system of filtration).
In the followin table there are indicated the useful hours to recirculate the pool water
Most common swimming pools:
Private swimming pool:
with average depth greater than 120 cm (used by up to 4 families) - maximum recirculation time allowed 6 hours.
Pools in condominium:
with average depth greater than 120cm (used by more than 4 families) - maximum recirculation time allowed for 4 hours.
Swimming pool for collective use:
(hotels, agritourisms, cottages, campsites) with average depth greater than 120cm - maximum recirculation time allowed 3 hours
By increasing the water recirculation times, you could design a less expensive (but less powerful) plant, to the detriment of the quality of bathing water. A practical example can be obtained from the data of tests carried out and considering the formulas of distinguished physicists (Zars and Kubel). During a recirculation you can retain about 50% of the impurities. On the second recycling it will be retained another 50% of impurities (of the remaining 50%) and so on. Therefore we recommend a minimum of 4 daily recirculations (every 6 hours).
For a correct assessment of the recirculation times, another aspect that should be considered is the amount of pollution: if, for example, the pool is in a place with vegetation with deciduous leaves, if it is located near factories, chimneys (or similar) or if a large number of bathers is expected.
We at pippohydro try to take all the factors into consideration so that we can suggest you the most suitable pump for your need.
Chemical products: the crystalline water is obtained with the chemical-physical treatment (chemical products and by means of filter components). If the physical treatment (the filters and filtration system) is insufficient, it is necessary to increase (sometimes excessively) the addition of chemical products to try to keep the water clean. This with the consequent of the increasing of sensitive skin irritations, the greater expenditure of money and the unpleasant smells.
When you buy a swimming pool pump you must always check:
BUT MOST OF ALL
4) That the pressure is sufficient to overcome the load losses caused by the filters (in order to maintain the right circulation time).
When calculating the correct circulation time, the maximum flow rate of the pool pump is irrelevant.
Hydraulic performance compared to a pressure of 0.8 bar
Equalization on some single-phase models of the same category.
17 cu.m/h 16,5 cu.m/h 14,5 cu.m/h
12,1 cu.m/h 9 cu.m/h
Reduced performance = high energy consumption = unclean/ dirty water
Hydraulic performance compared to a pressure of 0.8 bar
Equalization on some single-phase models of the same category.
29 cu.m/h 27,6 cu.m/h 23 cu.m/h
21,6 cu.m/h 21 cu.m/h 20,4 cu.m/h
A good price is an important requisite but quality and warranty are essential.
