Return Pumps: tests and real measurements compared

[daniloronchi]

The project of the return pumps is now old and started with the previous article "return pumps: calculating the flow" that I invite you to read, and which proposed an excel file, downloadable, editable with most of the pumps on the market, which were often recommended as return pumps in the forums and among hobbyists. The file made possible from the data of the pumps and the prevalence of each tank, get a flow rate calculated for each individual pump.

Although the file would be updated by anyone, I was always curious to know how pumps would behave in reality as well as declared by individual manufacturers.

http://www.danireef.com/images/2012_04_prova_pompe/DSF_8985.jpg

During the Zoomark of last year we decided to contact some companies in the industry to do a comparative test of the pumps.

Some have enthusiastically joined, in true alphabetical order, Eheim, Tunze and Sicce, and they have provided the pumps subject of our comprensive test.

To begin AndreaNegu, I and Giuseppe got in my backyard and we have caught some equipment. A stopwatch, a meter, a scale (see later why), a garden hose, a tank and a container, and finally a current probe.

http://www.danireef.com/images/2012_04_prova_pompe/DSF_8915.jpg

Our goal was to measure:

prevalence
flow
consumption

of each pump, in the best way possible.

Measuring the prevalence was very simple. We put one pump into the bucket, we connected the pump to garden hose and we measured the height reached by the water in the pipe, and we have photographed. Then we decreased the value read from the height of water in the bucket. So we have had a near perfect measurement of the prevalence.

http://www.danireef.com/images/2012_04_prova_pompe/DSF_8923.jpg

The beauty is that to measure the prevalence of certain pumps we have had to literally jump through hoops

http://www.danireef.com/images/2012_04_prova_pompe/DSF_8936.jpg

And indeed, sometimes it was not enough, we had to go even higher!

http://www.danireef.com/images/2012_04_prova_pompe/DSF_8967.jpg

Luckily we did not exceed 4 meters of head!

Measure the flow rate is however very complex and the result was only approximate but still useful for comparing similar pumps. Placing in fact a pump in a container, its flow rate was affected much of the prevalence in the same bucket, and then falling the water in the vessel then the flow rate fell the same. In any case, we measured the time it took each pump to fill a 20 liter tank, and run 3 measures was averaged, and then we divided by 20 liters to the time obtained, resulting in a capacity not perfect, but significant, especially for the comparison.

http://www.danireef.com/images/2012_04_prova_pompe/DSF_8988.jpg

During the test of the maximum head, we have also measured the power consumption with the current clamp, but as it was not possible to measure the cos (fi), the offset between the real and apparent power, the result is only and exclusively as a curiosity.

http://www.danireef.com/images/2012_04_prova_pompe/DSF_8938.jpg

At this point we wondered if we could do more, and for this we came to meet the Sicce, thanks to Federico Carraro, has made ​​available to us all its instruments of measurement.

[daniloronchi]

Then I and AndreaNegu loaded all our pumps in the car, rather we have remedied even two Eheim 1250 and 1260 which we considered a very interesting to test and we went to Padua to make the measurements.

http://www.danireef.com/images/2012_04_prova_pompe/DSF_9540.jpg

Here we visited the structure of Sicce, where we saw the room dedicated to the design, the secret underground where prototypes are created and then performed the tests.

http://www.danireef.com/images/2012_04_prova_pompe/DSF_9533.jpg

http://www.danireef.com/images/2012_04_prova_pompe/DSF_9366.jpg

http://www.danireef.com/images/2012_04_prova_pompe/DSF_9367.jpg

Finally we arrived at the "pool" where were the tools of measurement.

http://www.danireef.com/images/2012_04_prova_pompe/DSF_9370.jpg

Here we were able to measure flow rate and maximun head for each pump, plus we also measured the flow rate set at a prevalence of 130 cm. For every head we then measured consumption and the cos (fi). Keep in mind that, unlike the test made ​​at home, the current was generated by a generator which gave an output current almost perfect.

http://www.danireef.com/images/2012_04_prova_pompe/DSF_9372.jpg

The generator and current meter

http://www.danireef.com/images/2012_04_prova_pompe/DSF_9375_sicce_syncra_silent_05.jpg

The measuring head and flow in the small pool.

http://www.danireef.com/images/2012_04_prova_pompe/DSF_9412_sicce_syncra_silent_2.0.jpg

The measuring head and flow in the bigger pool.

The results in each case were very much in line with what has been experienced in our little home test.

In the following days I'll publish the measurements of each pump, and finally we'll publish an article where we update the excel file mentioned in the opening, which will take you to compare not only the new pumps, but we will create a sheet where the values will be averaged with our measurement.

Just to give you an idea of what we tested, here the list of the pumps sent by the company to do this very interesting test

Eheim 1048
Sicce Syncra 0.5
Sicce Syncra 1.0
Sicce Syncra 1.5
Sicce Syncra 2.0
Sicce Syncra 2.5
Sicce Syncra 3.0
Sicce Syncra 3.5
Sicce Syncra 4.0
Sicce Syncra 5.0
Tunze 1073.020
Tunze 1073.040
Tunze 1073.050

We also remedied between our used equipment, the Eheim 1250 and 1260 that have been tested only in the Sicce laboratory.

We then thanked the companies who provided the pumps under test, Eheim, Tunze and Sicce, and a special thanks to Sicce who has made ​​available its laboratory.

Are you interested on our measurements?

[ksed]

Interested to see what the results will be.

Ben fatto Danilo!

[daniloronchi]

As I promised you, here the results from Eheim pumps...

Let’s start with this article to speak about the numbers resulting from our tests, following the introduction that you can read here: Return Pumps: tests and real measurements compared, now we begin analyzing the first pump we had from Eheim , the Eheim 1048.

http://www.danireef.com/images/2012_04_eheim/DSG_2123_eheim_1048_pompa.jpg

The technical characteristics of which are:

Pump Output: 600 l/h
Delivery Head: 1,5 m
Power Consumption: 10 w
Dimensions: 147x115x75 mm

Certainly it is not definitely suitable for use as a return pump in any aquarium given the low delivery head, but it’s worth a test, also to compare it with small Sicce pumps.

http://www.danireef.com/images/2012_04_eheim/DSG_2128_eheim_1048_pompa.jpg

Our test began literally in my garage, where we tested all pumps we have received, not only this, in a single session.

The workforce was composed by DaniReef, AndreaNegu and Giuseppe, along with Ivan, who was involved in the photographic record.

http://www.danireef.com/images/2012_04_eheim/DSF_8921.jpg

Delivery Head Test

The first test we did was to measure the delivery head. The test is very simple to accomplish. We dropped the pump into a bucket full of water, we connected the pump to a garden hose plastic held vertically, and we measured the height reached by the water column from the ground. We then removed the height of water in the bucket, given that the delivery head is the distance between the two levels of water.

Let me point out that, contrary to what one might think, the level in the pipe was not fixed, but fluctuated noticeably.

http://www.danireef.com/images/2012_04_eheim/DSF_8919.jpg

So for Eheim 1048 we read 173 cm – 23 cm = measured delivery head 150 cm (150 cm declared)

Pump Output Test

Measure the pump output is however very complex and the result was only approximate but still useful for comparing similar pumps. Placing in fact a pump in a container, its output was affected too much from the prevalence present in the bucket itself, and thus the decreasing the water in the container fell also the output. In any case, we measured the time it took each pump to fill a 12 liter tank, and run 3 measures was averaged, and then we divided the time obtained by 12 liters, resulting in a capacity not perfect, but significant, especially for the comparison.

http://www.danireef.com/images/2012_04_prova_pompe/DSF_8988.jpg

To fill the tank up to 12 liters to Eheim 1048 took an average of 79 seconds.

The outout normalized to zero head through a trigonometric calculation reported a flow rate equal to 868 l/h (against the 600 declared). As mentioned in the introduction, this number is misleading because the test was conducted in an unscientific manner, but we will measure everything with a calibrated instrument, as we report later in the article.

In fact, we have seen how, in this particular test condition, the smaller pumps have recorded the best performance, and vice versa, this is probably due to the increased incidence of prevalence with less powerful pumps.

Test of Power Consumption

During the test of delivery head we also measured the power consumption with current clamp, but as it was also impossible to measure the power factor, the offset between the real and apparent power, the result is only and exclusively as a curiosity.

http://www.danireef.com/images/2012_04_eheim/DSF_8917.jpg

Consumption at maximum delivery head: 0.116 amps or 26 watts versus 10 watts declared.

At this point we wondered if we could do more, and for this we came to meet the Sicce, thanks to Federico Carraro, has made ​​available all its instruments of measurement.

I and AndreaNegu then loaded all our pumps in the car, rather we have remedied even two Eheim 1250 and 1260 which we considered a very interesting test and we went to Padua to make the measurements.

We should note however that all the measurements made in Sicce were performed with a supply current at 230V as standard of measurement in Europe, so keep in mind when you read the results.

Eheim 1250

http://www.danireef.com/images/2012_04_eheim/DSG_2135_eheim_1250_pompa.jpg

here with all the pieces that compose it

http://www.danireef.com/images/2012_04_eheim/DSG_2136_eheim_1250_pompa.jpg

The technical characteristics of which are:

Pump Output: 1.200 l/h
Delivery Head: 2,0 m
Power Consumption: 28 w
Dimensions: 180x120x95 mm

As we said before, this pump is used one, not brand new, then we can assume a small deviation from the declared values​​.

Eheim 1260

http://www.danireef.com/images/2012_04_eheim/DSG_2138_eheim_1260_pompa.jpg

here with all the pieces that compose it

http://www.danireef.com/images/2012_04_eheim/DSG_2141_eheim_1260_pompa.jpg

The technical characteristics of which are:

Pump Output: 2.400 l/h
Delivery Head: 3,7 m
Power Consumption: 65 w
Dimensions: 218x161x116 mm

As we said before, this pump is used one, not brand new, then we can assume a small deviation from the declared values​​.

We then tested the three pumps with flow meters and delivery head meters of Sicce and these were our measurements:

[daniloronchi]

Eheim 1048

http://www.danireef.com/images/2012_04_eheim/DSG_2122_eheim_1048_pompa.jpg

http://www.danireef.com/images/2012_04_eheim/DSF_9530_eheim_1048.jpg

Measured delivery head: 150 cm (declared 150 cm)

http://www.danireef.com/images/2012_04_eheim/DSF_9525_eheim_1048.jpg

Measured output: 533 l/h (declared 600) with 9 cm of delivery head

note: the measured delivery head has to be lowered by 12 cm which is the value read by the system when pump is off.

http://www.danireef.com/images/2012_04_eheim/DSF_9527_eheim_1048.jpg

Power Consumption at maximum delivery head: 8,3 watt
(declared 10 watt)

http://www.danireef.com/images/2012_04_eheim/DSF_9528_eheim_1048.jpg

Power Factor: 0,266

http://www.danireef.com/images/2012_04_eheim/DSF_9529_eheim_1048.jpg

Absorbed current: 0,13 A

[daniloronchi]

Eheim 1250

http://www.danireef.com/images/2012_04_eheim/DSG_2133_eheim_1250_pompa.jpg

http://www.danireef.com/images/2012_04_eheim/DSF_9517_eheim_1250.jpg

Measured delivery head: 195 cm (declared 200 cm)

http://www.danireef.com/images/2012_04_eheim/DSF_9512_eheim_1250.jpg

Measured output: 1.205 l/h (declared 1.200) with 43 cm of delivery head

note: the measured delivery head has to be lowered by 12 cm which is the value read by the system when pump is off.

http://www.danireef.com/images/2012_04_eheim/DSF_9513_eheim_1250.jpg

Power Consumption at maximum delivery head: 23,8 watt
(declared 28 watt)

http://www.danireef.com/images/2012_04_eheim/DSF_9514_eheim_1250.jpg

Power Factor: 0,543

http://www.danireef.com/images/2012_04_eheim/DSF_9515_eheim_1250.jpg

Absorbed current: 0,19 A

http://www.danireef.com/images/2012_04_eheim/DSF_9518_eheim_1250.jpg

Output measured at 132 cm of delivery head: 608 l/h (10,13 litri/minuto)

http://www.danireef.com/images/2012_04_eheim/DSF_9519_eheim_1250.jpg

Power Consumption at 132 cm: 18,8 watt

http://www.danireef.com/images/2012_04_eheim/DSF_9520_eheim_1250.jpg

Power Factor: 0,451

http://www.danireef.com/images/2012_04_eheim/DSF_9522_eheim_1250.jpg

Absorbed current: 0,18 A

[daniloronchi]

Eheim 1260

http://www.danireef.com/images/2012_04_eheim/DSG_2139_eheim_1260_pompa.jpg

http://www.danireef.com/images/2012_04_eheim/DSF_9484_eheim_1260.jpg

Measured delivery head: 330 cm (declared 370 cm)

http://www.danireef.com/images/2012_04_eheim/DSF_9480_eheim_1260.jpg

Measured output: 2.434 l/h (declared 2.400) with -16 cm of delivery head

http://www.danireef.com/images/2012_04_eheim/DSF_9481_eheim_1260-2.jpg

Power Consumption at maximum delivery head: 62,1 watt
(declared 65 watt)

http://www.danireef.com/images/2012_04_eheim/DSF_9482_eheim_1260-2.jpg

Power Factor: 0,644

http://www.danireef.com/images/2012_04_eheim/DSF_9483_eheim_1260.jpg

Absorbed current: 0,42 A

http://www.danireef.com/images/2012_04_eheim/DSF_9485_eheim_1260.jpg

Output measured at 130 cm of delivery head: 1.730 l/h

http://www.danireef.com/images/2012_04_eheim/DSF_9486_eheim_1260.jpg

Power Consumption at 132 cm: 51,3 watt

http://www.danireef.com/images/2012_04_eheim/DSF_9487_eheim_1260.jpg

Power Factor: 0,558

http://www.danireef.com/images/2012_04_eheim/DSF_9488_eheim_1260.jpg

Absorbed current: 0,40 A

[daniloronchi]

And finally here is the summary data of Eheim pumps:

Delivery Head

pump delivery head garage test laboratory test average deviation

Eheim 1048 150 150 150 150 100%
Eheim 1250 200 195 195 98%
Eheim 1260 370 330 330 89%

The measure of delivery head ​​has given us very positive values for the Eheim pumps, since both the 1048 1250 have fully complied with the declared values​​, while the 1260 differs by just over 10%. I still have to remember that both pumps 1250 and 1260 are not new.

Output

pump declared output laboratory test deviation

Eheim 1048 600 533 89%
Eheim 1250 1200 1205 100%
Eheim 1260 2400 2434 101%

The output rate has given us very positive values ​​for the Eheim pumps, since both the 1250 1260 have fully complied with the stated values​​, while the 1048 differs by just over 10%.

Power Consumption

pump declared power consumption laboratory test deviation Annual cost (0,26€/kwh)
Eheim 1048 10 8,3 83% 18,90 €
Eheim 1250 28 23,8 85% 54,21 €
Eheim 1260 65 62,1 96% 141,44 €

The measure of consumption has been extremely positive, since all the pumps tested exhibited a lower power consumption to the data declared, with two smaller pumps, the 1048 and 1250 with even lower values ​​of more than 15%.

Values ​​recorded at 130 cm of delivery head (more or less)

pump delivery head (cm) output (l/h) Power consumption (w) Annual cost (0,26€/kwh)
Eheim 1048
Eheim 1250 132 608 18,8 42,70
Eheim 1260 130 1730 51,3 116,52

The measurements made at 130 cm are indicative of a range that we have in our tanks, both as regards the output, for what concerns the power consuption and therefore the cost, calculated here at a cost of 0.26 euros per kwh, everyone can divide that value by 0.26 and re-multiply for the value they currently pay.

Correspondence with declared data

Finally, just as a comparison, we give a matching value compared to data reported by the various pumps

pump delivery head output Power consumption Average
Eheim 1048 100% 89% 83% 102%
Eheim 1250 98% 100% 85% 104%
Eheim 1260 89% 101% 96% 98%

We can therefore say that all three Eheim pumps are suited to the data declared, with the Eheim 1250 which won the scepter of the pump closer to the data reported. In any case we can only promote to honors all three pumps, you can see in the next image in a compact formation.

http://www.danireef.com/images/2012_04_eheim/DSG_2130_eheim_1048_1250_1260_pompe.jpg

http://www.danireef.com/images/2012_04_eheim/DSG_2132_eheim_1048_1250_1260_pompe.jpg

Many thanks to Eheim for providing us the Eheim pump 1048 subject of the test, and Sicce for the provision of the laboratory where the tests were performed.

[daniloronchi]

Sicce Syncra Silent pumps 0.5, 1.0 and 1.5: The Total Comparative Test

Let’s continue with this article to speak about the numbers resulting from our tests, following the introduction that you can read here: Return Pumps: tests and real measurements compared, and the test done with Eheim pumps: Eheim pumps 1048, 1250 and 1260: The Total Comparative Test now we begin analyzing the smallest Sicce pumps: the Sicce Syncra Silent 0,5, 1.0 and 1.5.

Sicce Syncra Silent 0.5

http://www.danireef.com/images/2012_04_sicce/DSG_2536_pompa_sicce_syncra_silent_05.jpg

The technical characteristics of which are:

Pump Output: 700 l/h
Delivery Head: 1,2 m
Power Consumption: 8 w
Dimensions: 90x48x72 mm

here with all the pieces that compose it

http://www.danireef.com/images/2012_04_sicce/DSG_2539_pompa_sicce_syncra_silent_05.jpg

Certainly it is not definitely suitable for use as a return pump in any aquarium given the low delivery head, but it’s worth a test, also to compare it with all other small pumps.

Our test began literally in my garage, where we tested all pumps we have received, not only this, in a single session.

Delivery Head Test

The first test we did was to measure the delivery head. The test is very simple to accomplish. We dropped the pump into a bucket full of water, we connected the pump to a garden hose plastic held vertically, and we measured the height reached by the water column from the ground. We then removed the height of water in the bucket, given that the delivery head is the distance between the two levels of water.

Let me point out that, contrary to what one might think, the level in the pipe was not fixed, but fluctuated noticeably.

http://www.danireef.com/images/2012_04_sicce/DSF_8951_pompa_sicce_syncra_silent_05.jpg

So for Sicce Syncra Silent 0.5 we read 143 cm – 23 cm = measured delivery head 120 cm (120 cm declared)

Pump Output Test

Measure the pump output is however very complex and the result was only approximate but still useful for comparing similar pumps. Placing in fact a pump in a container, its output was affected too much from the prevalence present in the bucket itself, and thus the decreasing the water in the container fell also the output. In any case, we measured the time it took each pump to fill a 8 liter tank, and run 3 measures was averaged, and then we divided the time obtained by 8 liters, resulting in a capacity not perfect, but significant, especially for the comparison.

http://www.danireef.com/images/2012_04_sicce/DSF_8952_pompa_sicce_syncra_silent_05.jpg

To fill the tank up to 8 liters to Sicce Syncra Silent 0.5 took an average of 50 seconds.

The output with this simple calculation reported a flow rate equal to 575 l/h (against the 700 declared). As mentioned in the introduction, this number is misleading because the test was conducted in an unscientific manner, but we will measure everything with a calibrated instrument, as we report later in the article.

In fact, we have seen how, in this particular test condition, the smaller pumps have recorded the best performance, and vice versa, this is probably due to the increased incidence of prevalence with less powerful pumps.

Test of Power Consumption

During the test of delivery head we also measured the power consumption with current clamp, but as it was also impossible to measure the power factor, the offset between the real and apparent power, the result is only and exclusively as a curiosity.

http://www.danireef.com/images/2012_04_sicce/DSF_8950.jpg

Consumption at maximum delivery head: 0.41 amps or 9 watts versus 8 watts declared.

At this point we wondered if we could do more, and for this we came to meet the Sicce, thanks to Federico Carraro, has made ​​available all its instruments of measurement.

I and AndreaNegu then loaded all our pumps in the car and we went to Padua to make the measurements.

We should note however that all the measurements made in Sicce were performed with a supply current at 230V as standard of measurement in Europe, so keep in mind when you read the results.

http://www.danireef.com/images/2012_04_sicce/DSG_2538_pompa_sicce_syncra_silent_05.jpg

http://www.danireef.com/images/2012_04_sicce/sicce_05.jpg

[daniloronchi]

Sicce Syncra Silent 1.0

http://www.danireef.com/images/2012_04_sicce/DSG_2546_pompa_sicce_syncra_silent_1.jpg

here with all the pieces that compose it

http://www.danireef.com/images/2012_04_sicce/DSG_2543_pompa_sicce_syncra_silent_1.jpg

The technical characteristics of which are:

Pump Output: 950 l/h
Delivery Head: 1,5 m
Power Consumption: 16 w
Dimensions: 90x48x72 mm

Certainly it is not definitely suitable for use as a return pump in any aquarium given the low delivery head, but it’s worth a test, also to compare it with all other small pumps.

Our test began literally in my garage, where we tested all pumps we have received, not only this, in a single session.

Delivery Head Test

The first test we did was to measure the delivery head. The test is very simple to accomplish. We dropped the pump into a bucket full of water, we connected the pump to a garden hose plastic held vertically, and we measured the height reached by the water column from the ground. We then removed the height of water in the bucket, given that the delivery head is the distance between the two levels of water.

Let me point out that, contrary to what one might think, the level in the pipe was not fixed, but fluctuated noticeably.

http://www.danireef.com/images/2012_04_sicce/DSF_8955.jpg

So for Sicce Syncra Silent 1.0 we read 188 cm – 23 cm = measured delivery head 165 cm (150 cm declared)

Pump Output Test

Measure the pump output is however very complex and the result was only approximate but still useful for comparing similar pumps. Placing in fact a pump in a container, its output was affected too much from the prevalence present in the bucket itself, and thus the decreasing the water in the container fell also the output. In any case, we measured the time it took each pump to fill a 8 liter tank, and run 3 measures was averaged, and then we divided the time obtained by 8 liters, resulting in a capacity not perfect, but significant, especially for the comparison.

http://www.danireef.com/images/2012_04_sicce/DSF_8953.jpg

To fill the tank up to 8 liters to Sicce Syncra Silent 1.0 took an average of 39 seconds.

The output with this simple calculation reported a flow rate equal to 737 l/h (against the 950 declared). As mentioned in the introduction, this number is misleading because the test was conducted in an unscientific manner, but we will measure everything with a calibrated instrument, as we report later in the article.

In fact, we have seen how, in this particular test condition, the smaller pumps have recorded the best performance, and vice versa, this is probably due to the increased incidence of prevalence with less powerful pumps.

Test of Power Consumption

During the test of delivery head we also measured the power consumption with current clamp, but as it was also impossible to measure the power factor, the offset between the real and apparent power, the result is only and exclusively as a curiosity.

http://www.danireef.com/images/2012_04_sicce/DSF_8954.jpg

Consumption at maximum delivery head: 0.113 amps or 25 watts versus 16 watts declared.

At this point we wondered if we could do more, and for this we came to meet the Sicce, thanks to Federico Carraro, has made ​​available all its instruments of measurement.

We should note however that all the measurements made in Sicce were performed with a supply current at 230V as standard of measurement in Europe, so keep in mind when you read the results.

http://www.danireef.com/images/2012_04_sicce/DSG_2543_pompa_sicce_syncra_silent_1.jpg

http://www.danireef.com/images/2012_04_sicce/DSG_2543_pompa_sicce_syncra_silent_1.jpg

[daniloronchi]

Sicce Syncra Silent 1.5

http://www.danireef.com/images/2012_04_sicce/DSG_2548_pompa_sicce_syncra_silent_15.jpg

here with all the pieces that compose it

http://www.danireef.com/images/2012_04_sicce/DSG_2549_pompa_sicce_syncra_silent_15.jpg

The technical characteristics of which are:

Pump Output: 1.350 l/h
Delivery Head: 1,8 m
Power Consumption: 23 w
Dimensions: 103x60x78 mm

Certainly it is not definitely suitable for use as a return pump in any aquarium given the low delivery head, but it’s worth a test, also to compare it with all other small pumps.

Our test began literally in my garage, where we tested all pumps we have received, not only this, in a single session.

Delivery Head Test

The first test we did was to measure the delivery head. The test is very simple to accomplish. We dropped the pump into a bucket full of water, we connected the pump to a garden hose plastic held vertically, and we measured the height reached by the water column from the ground. We then removed the height of water in the bucket, given that the delivery head is the distance between the two levels of water.

Let me point out that, contrary to what one might think, the level in the pipe was not fixed, but fluctuated noticeably.

http://www.danireef.com/images/2012_04_sicce/DSF_8958.jpg

So for Sicce Syncra Silent 1.5 we read 192,5 cm – 22,5 cm = measured delivery head 170 cm (180 cm declared)

Pump Output Test

Measure the pump output is however very complex and the result was only approximate but still useful for comparing similar pumps. Placing in fact a pump in a container, its output was affected too much from the prevalence present in the bucket itself, and thus the decreasing the water in the container fell also the output. In any case, we measured the time it took each pump to fill a 12 liter tank, and run 3 measures was averaged, and then we divided the time obtained by 12 liters, resulting in a capacity not perfect, but significant, especially for the comparison.

To fill the tank up to 12 liters to Sicce Syncra Silent 1.5 took an average of 46 seconds.

The output with this simple calculation reported a flow rate equal to 937 l/h (against the 1.350 declared). As mentioned in the introduction, this number is misleading because the test was conducted in an unscientific manner, but we will measure everything with a calibrated instrument, as we report later in the article.

In fact, we have seen how, in this particular test condition, the smaller pumps have recorded the best performance, and vice versa, this is probably due to the increased incidence of prevalence with less powerful pumps.

Test of Power Consumption

During the test of delivery head we also measured the power consumption with current clamp, but as it was also impossible to measure the power factor, the offset between the real and apparent power, the result is only and exclusively as a curiosity.

http://www.danireef.com/images/2012_04_sicce/DSF_8957.jpg

Consumption at maximum delivery head: 0.139 amps or 31 watts versus 23 watts declared.

At this point we wondered if we could do more, and for this we came to meet the Sicce, thanks to Federico Carraro, has made ​​available all its instruments of measurement.

We should note however that all the measurements made in Sicce were performed with a supply current at 230V as standard of measurement in Europe, so keep in mind when you read the results.

http://www.danireef.com/images/2012_04_sicce/DSG_2549_pompa_sicce_syncra_silent_15.jpg

http://www.danireef.com/images/2012_04_sicce/sicce_15.jpg

http://www.danireef.com/images/2012_04_sicce/sicce_small.jpg

We can therefore say that all three Sicce pumps are suited to the data declared, with the two smallest, the 0.5 and 1.0 which won the scepter of the pump closer to the data reported and the 1.5 that win for delivery head. In any case we can only promote to honors all three pumps, you can see in the next image in a compact formation.

http://www.danireef.com/images/2012_04_sicce/DSG_2550_pompa_sicce_syncra_silent_1_05_15.jpg

Many thanks to Sicce for providing us the three pumps subject of the test, and for the provision of the laboratory where the tests were performed.

[sirreal63]

Thank You for taking the time to do this.