Hoping to answer a few of your questions here. Anymore questions get in touch

Q – What are some different types of water pumps?

Well pumps, borehole pumps, sump pumps and multistage pumps are some of the different types of water pumps that you can find. Water pumps can be useful in both businesses and homes to bring or move out water. That’s where DWP services come in. Here is a bit about each of the above.

Well pumps These are often used in more remote areas. Wells used to be a main source of water for many people and are still widely used across the world. Well pumps were designed to create a high flow of water and a substantial pressure to ensure even the most modern of homes can run directly from a single well pump.

Borehole Pumps Invented for high pressure at low flow for the deepest of boreholes. In most cases these pumps are installed in a borehole and the water is then pumped into a holding tank. The water is then either gravity fed to its final destination or pumped once again to ensure a sufficient flow are pressure for the end user.

Submerisble pumps can remove water in a basement or an external underground tank. They come in many sizes to work in a domestic application right up to the most demanding commercial installations. No matter if you have a basement that floods now and then or a storm a sewage application there is a submersible pump that can can for you.

Multistage pumps Found in higher pressure at high flow applications, these pumps come in end suction (horizontal) or vertical orientations. They are used across the world for pump clean water to its final destination from a water authority application right through to hotel.

Q – How much of a submersible Water Pump is submersed?

The whole thing is submersed. A submersible pump must be fully and completely submerged in fluid, including the motor which is fixed to the body of the pump.

Q – What happens if a Water Pump runs dry?

Pumps use water to cool the internal impellers, when a water pump runs dry it is no longer being cooled. Impellers are either metal or plastic, and both of these materials do not cope to well and getting hot! The mechanical seals are made of ceramic which then start to quickly wear and end up leaking. Ceramic used throughout a multistage pump can also shatter causing critical failure forcing the entire element to be repaired or in a lot of cases replaced.

Q – How high can I lift Water with a Pump?

A common question I get asked without doubt. Even though we refer to it as suction lift, pumps actually do not lift liquid. What they do is create a void by evacuating the air in the line. Atmospheric pressure on the liquid then pushes it up the hose and into the pump. Simple, right?!

Pumps tend to lift higher than most manufactures will recommend but if possible it is always best to avoid suction lift. When a pump is lifting water and not variable speed your pump does not know if it gets air locked it therefore runs dry and unless you spot it early and prime it once again critical failure is likely. Luckily we have many other solutions to hand such as inverters to set dry running alarms or even well pumps!

 Q – What is Bar?

The bar is a unit of pressure equal to 100 KiloPascals (kPa is the abbreviation). This is roughly equal to the atmospheric pressure on Earth at sea level.
Most mains municipal water suppliers within the UK provide water pressure at an average of 2 bar. Some areas get mains water pressure as high as 3 bar. 1 bar is equal to 14.5psi.

Q – What is Cut In and Cut Out Pressure

Cut In Pressure is the set pressure that the water pump turns on at. Alternatively, the Cut Out Pressure is set pressure that the water pump turns off at. Simple as that!

Q. Any common reasons for Pump failure?

The most common reasons are probably from the following list:

  1. The tank size being too small for the job it has to perform
  2. Wrong choice of pump
  3. Running dry
  4. Short cycling

Q. What size or horsepower of pump do I need? 

Generally higher horsepower pumps put out more water. You’ll find different models of jet pump are designed differently. A ½ HP pump can provide water to a small house with one bathroom and just a couple people.

If you add to that a second bathroom that might be used at the same time as the first, then going with higher horsepower is going to provide the extra water you’ll need.

With examples of a houses with multiple bathrooms, multiple people, then you probably need to go with one of the 1 HP models.

Lower Water Pressure guide with DWP Services


Low water pressure can be a sad experience for many homeowners, boosting mains water is becoming a common occurrence across the UK and beyond. Water booster pumps come in all shapes, sizes and quality. 

DWP Service have experienced a wealth of domestic boosting systems to satisfy every application and budget, let’s go through some of the products available on the market.


By far the best quality unit on the market. Available in single or twin pump configurations with a range of stored water 175l to over 2000l stores water. With the vast range of options available you can ensure these units can fit in your given location. These units come variable speed as standard for energy efficiency, 1” full bore filling valve to ensure your booster set does not run out of water (if sized correctly) stainless steel pipework and the only recognised WRAS approved integrated booster pump and tank system on the market. These units can be sized for an apartment to a 15 bedroom mansion! 


A cost effective and compact way of boosting water in a light to medium domestic application. These units come fixed speed as standard with a moulded tank around the water pump and controller itself. A disadvantage of the Grundfos home booster is the limited capacity. Luckily you can buy a slave tank to assist with giving you more stored water. If your property suffers from a poor water supply a Grundfos home booster may be the solution for you. 


Xylem Lowaras answer to the grundfos home booster. Again cost effective and available to fixed for variable speed options. This unit comes in a blue steel structure so you don’t have to put up with visible pump and control equipment. 180 litre storage tank gives you enough reserve water to feed a light to medium domestic application. Its always good to ensure you have a good incoming water flow rate for this option as adding extra storage is not particularly straight forward.


Pedrello have worked hard to attack the market in the direction of the Scubatank. They provide a fixed and variable speed option and different storage volumes along with tank shape. When space is critical you can really fit one of these tanks in a space that suits you!


This is where DWP Services can help you even further. After looking at these options you may find none suit your application or budget. A bespoke system could suit your property by working to your budget and available space!