Do I need a negative or positive shower pump?

It can often be confusing trying to figure out what type of shower pump you need. There’s a lot to consider and a lot too about your home that will determine the outcome.

However, one of the most commonly asked questions is regarding negative or positive shower pumps. The team here at Pump Sales Direct have come up with a definitive guide to help those looking for answers to this common shower pump question.

Shower Pump

Positive shower head pump
A positive shower pump is needed if your shower head is beneath the cold water tank, with a minimum flow rate of 0.6 litres per minute. It will need a positive shower head pump to give it a boost, as it is relying on a gravity feed of water to kick start the impellers and start pumping hot and cold water.

Negative shower head pump
A negative shower pump is suitable where the shower head is above or at the same level as the water tank. It works by sucking water from the tank to work the shower.

The next section to be explained is that around the impellers, where we will talk in a bit more detail about the suitability of each for different layouts around the home – and also how they supply water:

Twin Impeller
This is the most common type of pump, in which the impellers are basically like small propellers, which are fed by a water supply which is then delivered to a mixer. A twin impeller should be fitted on both the hot and cold water supplies to ensure both are boosted to the same level.

It is advised as well that it should always be fitted away from where people sit or sleep, as it can be quite noisy. It is also thought that it is better for those with a supply that’s not very well balanced.

Single impeller
A single impeller can only be installed onto a single supply and it can only pump one water supply, either hot or cold.

It operates using a single blade which drives the water to the mixer, and it is mainly used to boost the hot supply if the colds is main fed, or in this individual situation it’s easier to install two single pumps.

Shower Pump Brands
Now that we’ve covers the basics of negative and positive shower pumps, it’s now time to choose from the wide selection of shower pump brands available.

The sheer amount of choice can often seem a little overwhelming; therefore we have picked out three shower pump models that stand out for their high performance and popularity with Pump Sales Direct customers;

Grundfos pumps offer a great range of environmentally friendly, reliable pumps which are known for their easy installation and anti-vibration feet to help reduce excess noise.

The popular Salamander CT Force range offers high quality value for money. The Salamander range of pumps is very easy to install and will last for a number of years.

Stuart Turner is another key brand within the shower pump sector, and the brands Monsoon range is used by many industry professionals.

Shop the full range of Shower Pumps today here at Pump Sales Direct!

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