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Selecting the Right Shower Pump

If you suffer from poor water pressure in your home a shower pump can often be the perfect solution to boosting water performance. The results are; improved shower performance, quicker bath fill and strong flowing taps. However, it is important to make sure that you get the right pump for your heating system.

Which heating system do I have?

GRAVITY FED
If you live in an older property there’s a good chance you have a gravity-fed system, renowned for poor pressure and flow.

I have this system
MAINS FED: COMBI BOILER
Combination boilers are common and rely solely on mains pressure to deliver water around your home.                                                                                .

I have this system
UNVENTED
Unvented systems require a seperate hot water cylinder to store a quantity of hot water at mains pressure.                                                                                                                                      

I have this system
 

Gravity Fed System

Most Salamander pumps are suitable for gravity fed systems, this includes CT Xtra, CT Force, CT Bathroom and Right pump ranges.

Do I need a postive head or universal pump?

Where the cold water tank is also affects which pump you need:

For gravity fed systems, the gap between the bottom of your cold water storage tank and the highest point in your pipework or highest outlet determines whether your gravity fed Usystem is positive or negative head.

Positive head pumps will only work in positive head systems. Universal (negative head pumps) will work in both situations, so if you are unsure, choose a negative head pump, or call us for advice.

YOU HAVE A POSITIVE HEAD SYSTEM... If you have more than 600mm from the bottom of your cold water storage tank to the highest point in the system after the pump.

For example, the illustration below shows a shower with pipework below the dotted line indicating the 600mm point.

YOU HAVE A NEGATIVE HEAD SYSTEM... If your outlet or highest point in the pipework after the pump is above, or in line with, the 600mm point below the cold water storage tank.

For example, the illustration on the right shows a shower in the attic with pipework above the dotted line indicating the 600mm point.

You also have a negative head system if you time how long it takes to fill a measuring jug and:
  • it takes more than 30 seconds to get 2 litres of water from a mixed tap or shower (probably the highest one in your home) or
  • it takes more than 30 seconds to get 1 litre of water from either the hot or cold tap.
 

What do I want to pump to?

You need to work out whether you want to pump to the shower only or additional appliances for example your bath taps, toilet cistern or washing machine. The CT Xtra range will pump the shower only, all other ranges are suitable for multiple household appliances. View our shower pump selector guide below for further information.

Am I pumping the hot water and the cold?

In most cases you will be looking to boost both hot and cold water supply within your home, 

  • Twin pumps are designed to supply both hot and cold water to showers, bathroom and whole house installations
  • Single impeller pumps are to supply hot or cold water, either to single or multiple outlets. This can often be when the cold water is mains fed and the hot needs boosted to match this pressure.

What bar rating do I need?

Selecting the right bar pump for you involves considering the size of your shower head and how many outlets you want to pump to. View our shower pump selector guide below for further information.

Shower Pump Selector Guide:

Here is a guide to which type of pump you’ll need to boost the water in your home. Once confirmed you can then select which pump range you prefer.

I want to boost: Gravity Fed Positive Head Gravity Fed Negative head
Shower only with a shower head of 100-120mm 1.5 bar twin positive head pump 1.5 bar twin universal pump
Small bathroom and a shower with a shower head of 100-120mm. 2.0 bar twin positive head pump 2.0 bar twin universal pump
Larger bathroom or multiple smaller bathrooms with a shower head of 120mm+ 2.0 bar twin positive head pump 2.0 bar twin universal pump
Multiple bathrooms, 150mm+ shower heads and/or shower with massage function and body jets.  3.0 bar twin positive head pump 3.0 bar twin universal pump

For more detailed pump selection support visit our pump selector.

Which pump range should I choose?

Salamander pumps have two pump ranges suitable for boosting shower performance in a gravity fed system, CT and Right Pumps.

The CT Range of shower pumps have a regenerative impeller. They are longlasting, hardworking, compact and easy to install.

The CT Xtra shower pumps are suitable for positive head installations and are available as twin or single ended, 1.5 or 2.0 bar.

The CT Bathroom pumps are designed to boost hot and cold water to appliances within the bathroom. Available as positive head or univesal up to 2.6 bar.

The CT Force range has robust brass ends and brass impeller. They come in both universal and positive head variants and will boost the shower, bathroom and whole house up to 3.0 bar.

 

The Right Pump Range of shower pumps have a centrifugal impeller allowing them to move water very quietly and offer maintained pressure at increased flow rates. Suitable for boosting the shower bathroom and whole house, available in positive and universal, and up to 3.0 bar pressure.

 

Mains Fed Heating System

If you have a combi boiler in your home your system is mains fed and relies on the local water authorities to provide water to your property boundary. This means that your water pressure may vary at different times of day e.g. when your neighbours are also using water too, or you may constantly have less water pressure and glow than you would like.

Salamander Pumps offer a mains water booster pump called HomeBoost which will fit directly onto your incoming mains. This product will boost water performance either directly or indirectly via your combi boiler up to 12 litres per minute.

Click here to find out more about HomeBoost or watch our product video.

 

Unvented System

You can improve water performance in an unvented system using a break tank and shower pump. We recommend speaking to a member of our technical team on 0191 5162002 or contact a local plumber before making a purchase.


 

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