Submergible Pumps

In-line centrifugal pumps have several advantages over submergible pumps:

1st, there is no electrical cord in the water to short out;
2nd, Koi can hear the submergible pumps pound away;
3rd, submergible pumps have smaller outlets; for instance in the Cal S1200 pump it is 1/2" which leads to greater pump head loss or lower flow;
4th, they are very inefficient, the Cal S1200 pump does not even match a 1/15 HP in-line pump's output, yet it takes 370 watts, which is enough to run a 1/3 HP inline pump with 10-20 times more flow, and at much larger pump heads;
5th, they are liquid filled and eventually the seals can leak and the liquid can get into your pond;
6th, they are not cheaper than an equivalent in-line pump.

If you used 10 feet of 1/2" pipe or tubing in the Cal S1200 you would have 13 ft of pump head from the water friction resistance in the pipe, which would only allow 540 gallons per hour or 9 gallons per minute; 20 feet would result in 300 GPH or 5 GPM.

An inline pump like the Iron Might's 1/15 HP pump is the same price as the Cal S1200 at $169.00, yet it not only greatly out pumps it, but it only uses 1.3 amps instead of 3.3 amps, which is a 60% savings. It also features a 1-1/2" inlet/outlet for greater flow at less resistance.

At 5' of pump head the Cal S1200 will pump 840 GPH, while the Iron Might will pump 2,500 GPH. At 11' the Cal does 600 GPH and the Iron Might does 1,900 GPH, and at a savings of 60% of the wattage cost.

Phone: 303-883-8000

e-mail: ColoradoKoi@hotmail.com

Best Pond Pumps

Postal Address: 3551 S. Monaco Parkway, Suite #138, Denver, Colorado 80237