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BOYU Pond Pump  
BOYU in Pond Skimmer  
Submersible Dirty Water Pumps  
Submersible Fountain Pumps  
Yamitsu Surface Wattpump  
HiBlow Air Pumps  
Hi-Flow Air Pumps  
Yamitsu Pre-filters  
  Yamitsu Surface Wattpump
  Yamitsu Surface Wattpump
  Length: 660 mm (26") - Height: 410 mm (16") - Depth: 240 mm (9.5")
  The Yamitsu range of Wattpumps were custom designed for use on garden ponds, water features, waterfalls and koi ponds. They are built to deliver large volumes of water at very low electrical consumptions whilst maintaining high pressure levels. This is a fundamental requirement for a good filtration system. Their highly efficient design ensures high performance with very low running costs. They are available in the following models:
250 Wattpump (250 watts max consumption) 400 Wattpump (400 watts max consumption)
  Key features: 250 Wattpump will pump 9,782 litres at 1.5 metres head and can pump to a head exceding 5.25 meters.
  Key features: 400 Wattpump will pump 13,105 litres at 1.5 metres head and can pump to a head exceding 7.5meters.
  High performance - Extremely quiet - Giant Integral strainer - Highly efficient
  Fresh & salt water - Manufactured for Yamitsu and Custom built for ponds
  Yamitsu Surface Wattpump
Yamitsu Surface Wattpump
7 Litre Basket
Shown above and below with our superior basket (largest) compared with two others that are sold into the market who claim to be for garden and koi ponds. Our larger basket helps assist the pump in priming which also dramatically helps with the pumps economical running costs.
Yamitsu Surface Wattpump
  Yamitsu Surface WattpumpYamitsu Surface Wattpump
  Yamitsu Surface Wattpump
  Things you should know when choosing a pump.
  (what you get for your hard earned cash)
  Not all pump manufacturers quote the power consumption of their pumps using input watts. Instead, some quote output watts which frequently bear no relationship to the actual power consumed. Indeed, if this figure is very low, it may well indicate the unit is poorly designed and inefficient.
  Remember, what you pay for are the input watts, the output watts only relates to the pump's efficiency and not what it costs you to run it.
  The Yamitsu 250 Wattpump shown above will consume between 207 watts to 250 watts at 240 volts depending on the workload.
  WattPump 250Watt Infomation

WattPump 250Watt Infomation

All figures achieved using 43mm pipe - Better results can sometimes be achieved with 50mm or 2" pipe - Fittings included

  250 Wattpump water to wattage and head distance to wattage information sheets
  WattPump 400Watt Infomation

WattPump 400Watt Infomation

All figures achieved using 43mm pipe - Better results can sometimes be achieved with 50mm or 2" pipe - Fittings included

  400 Wattpump water to wattage and head distance to wattage information sheets
  At Yamitsu we quote input wattage as a measure of power consumption as this is what you pay for. We think this the most honest approach to selling our products.
  Next you should look for the pump's performance (power to pump water). You should be aware that some of the smaller lower wattage or lower powered pumps, can have a serious drop-off in performance output when put to work.
  To choose the correct pump for your system there is a simple rule of thumb. Take the volume (gallonage) of water in your pond and divide this figure by 2. For example a 1000 gallon pond needs a pump that is going to pump 500 gallons per hour (the entire contents of your pond every 2 hours) after all allowances have been made for frictional losses that will be encountered in your pipework. Using the figures quoted by some pump manufacturers, you would probably need to consider an 800-1000 gallon an hour pump!
  Pumps are always under pressure. It is as if they are always pumping water uphill even when they are not. This resistance to flow is referred to as head. A reasonable length of pipe with some bends will reduce a pump's output because of:
  • The friction between the pipe walls and the water
  • The tightness of the angle of any bends and other restrictions. Fountains etc.
  It follows that the larger the pipe the less resistance and greater achievable water flow. Conversely the smaller the pipe the lower the possible head and reduced flow.
  It should be noted that a lot of pumps do not have enough power to overcome a 5 metre head .
  This kind of practical philosophy and outlook is also being applied to the new range of submersibles that Kockney Koi are now manufacturing. 
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