Choosing the right pump - gravity fed 'vented' systems

Do I need a 'Standard' or 'Universal' pump type?

When considering a common application such as boosting the performance of a shower, the pump will need to be able to switch itself on automatically when the shower is switched on.

A key decision in this respect is whether a 'Standard' or 'Universal' pump type should be used.

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Universal Pump Type Standard Pump Type
 Gravity Fed Plumbing System Negative Head  Gravity Fed Plumbing System Positive Head

If the flow from the shower head is LESS than 1 litre per minute, due to gravity flow without a pump fitted then a 'negative head' situation exists and a 'Universal' pump type must be used.

The flow can easily be measured by directing the shower head flow into a measuring jug and recording the fill level after 1 minute.

If the flow from the shower head is MORE than 1 litre per minute, due to gravity flow without a pump fitted then a 'positive head' situation exists and a 'Standard' pump type can be used.

The flow can easily be measured by directing the shower head flow into a measuring jug and recording the fill level after
1 minute.

IMPORTANT NOTE:

If there is any doubt at all - especially if the shower has not yet been installed, opt for a 'Universal' pump type.

IMPORTANT NOTE:

Just because there is a 'positive head' created by the height of the cold water tank above the shower outlet, there may still not be enough flow to enable a 'Standard' type pump to work!

For a Gravity (Vented) 'Low Pressure System' where the flow from the shower head due to gravity (no pump fitted) is less than 1 litre/min, a 'negative head' situation exists and a 'Universal' pump type must be used.

You should consider one of the following pump units:

monsoon (universal)

showermate (universal)

For a Gravity (Vented) 'Low Pressure System' where the flow from the shower head due to gravity (no pump fitted) is more than 1 litre/min, a 'positive head' situation exists and a 'Standard' pump type can be used.

You should consider one of the following pump units:

monsoon (standard)

showermate (standard)

showermate eco (standard)