Jet pumps

In the communication with the customer, kindly make sure that he understands the following:

• 95% of the issues with this type of pump is related to the installation (air)

• We will try to find the cause by distance (e.g. video's, asking questions etc)

• We want to avoid sending a pump for a warranty check to the manufacturer to avoid costs. In most cases, the issue is related to installation, not the pump. If the pump works correctly at the manufacturer, the customer has to pay at least 75 euro (for the handling time and return of the pump)

• A jet pump is a very simple product with hardly any complicated technologies. All pumps are tested before leaving the factory (some water can remain in the pump). If the customer experiences pressure/suction problems, it is rarely a default of the pump. In most cases, it is caused by air or damaged wearing parts on the inside of the pump. 

• The parts on the inside of the pump, are wearing parts. These are not covered by warranty. Most of these parts can be replaced though. The customer can order them on our shops.

New pumps

95% of problems with (aqua)jet pumps are caused by air. Certainly if the pump is brand new, it is hardly ever a default of the pump.

The pump installation has to be checked for air. Checks to be done:

Suction hose

• What is the length and diameter of the suction hose?

• What is the vertical distance between pump and water?

• Does the non-return valve on the suction hose work correctly?

• Are there many curves in the suction hose? This needs to be avoided due to possible air bubbles

• Did the customer fill the suction hose with water before connecting it to the pump?

• Is the end of the suction hose completely underwater all the time?

Couplings

• Did the customer use sufficient teflon (10 turns)?

• What type of couplings are used? Gardena type couplings could cause air problems

Filter

• Is a filter installed before the pump? There could be air in the filter. Ask to test the pump without filter

Pump

• Did the customer fill the pump before starting the pump?

• Does the water stay in the pump?

• Does the customer have a protection against running dry installed on the pump?

• Can the customer move the fan by hand easily?

Control-D

Is a red light blinking? This means that the pump has been stopped because of a lack of water or air in the system.

With all above information and a video, the cause may be found. You can always ask Fred for technical support.

Useful blogs:

https://www.waterpump.co.uk/blog/post/installation-and-first-time-startup-of-an-irrigation-booster-pump

https://www.waterpump.co.uk/blog/post/suction-problems

Used pumps

If a pump has worked correctly for a certain period, the cause is probably a wearing part or air.

• See the list for New pumps for a list of questions related to air

• Leaking
  If the pump is leaking, this is probably due to a damaged seal. The seal can be damaged due to e.g. dry running (see below) or sand in the water. This is not covered by warranty.
  Ask the customer to open the pump housing and make pictures.

• No water pumped
  Check for air problems (extra focus on suction hose damages and non-return valve)
  Dry running: Parts may be damaged and not covered by warranty
  Does the axe still turn? A pebble may block it or wearing parts can block the axe due to dry running (see below)

• Motor hums
  The pump does not turn on but you can hear the pump hum: the capacitor can be damaged. This is not covered by warranty.
  Ask for a picture of the capacitor

• The (cast-iron) pump housing is broken
  The pump is probably damaged due to frost. This is not covered by warranty

Please see Orders - Dab DNA for an explanation of how to find the correct reference for damaged parts on DAB pumps

The pump does not turn off automatically

• Please see blog for full explanation
  https://www.waterpump.co.uk/blog/post/booster-pump-does-not-switch-off

The pump switches on and off all the time (pulsating)

• does the pump have a tank? Check pressure +/- 1.9 bar

• Pressure switch could be damaged

• Could also be helpful to check blog: https://www.waterpump.co.uk/blog/post/booster-pump-does-not-switch-off

Dry running

If a pump is running without water, the (plastic) parts on the inside of the pump get hot and are damaged quite quickly. 

• Does the axe of the pump still turn?
  Ask the customer to turn the fan by hand. If the axe is blocked, ask to open the pump. The impeller is probably melted.

• Does the customer have a protection against dry running?
  No: especially for used pumps, very likely pump has run dry.
  Yes: this protects the pump against running dry BUT if there is a small leak behind the pump, the temperature of the water can still get very hot. Wearing parts can still be damaged.

• Ask for pictures of the inside of the pump
  The customer can open up the pump housing by opening the 4 screws with an Allen key.
  It is allowed to open the pump within the warranty conditions
  Ask for pictures of the impeller from different angels.

When you have received the pictures, ask Fred to take a look if he sees a cause.

A variety of spare parts can be ordered by the customer on the different shops (Accessories - Spare parts). 

No cause/solution found?

Ask Fred for authorization to send a new pump or have it checked

As the problems are most likely caused by the installation/air, we do not replace the pump easily / without a check at the manufacturer.
Please go to warranty how to request the pump to be checked