Pumps Explained

Positive Single Pumps
Positive pumps are suitable for installation into an open vented hot and cold water system and require a gravity flow of 0.6 l/min to operate.

A positive single pump can be used to:

• Boost the water pressure in either the hot or cold water supply pipe.
• Boost the blended water outlet between the shower valve and the shower rose.

Note: These pumps should not be used for:

• Supply of hot and cold water services to a common mixer.
• Supply of pumped hot water service to a common mixer where the cold supply is mains fed.
  
  

Positive Twin Pumps

A positive twin pump is designed to be installed into both the hot and cold services to boost both supplies equally and should ideally be installed on the floor of the hot water cylinder cupboard.

A positive twin pump can be used to:

• Boost both hot and cold water to a complete bathroom, cloakroom and kitchen.
• Boost hot and cold supplies to a high performance shower system.
• Boost hot and cold water to a complete house.
  

Negative Single Pumps

Suitable for installation into an open vented hot and cold water system. Negative pumps do not require a gravity flow to start, making them ideal for use in loft conversions and apartments where a gravity flow of

0.6 l/min cannot be achieved. A Monsoon negative pump will work where either positive or negative conditions exist.

Negative Single Pumps
A negative single pump can be used to:

• Boost the water pressure in either the hot or cold water supply pipe.
• Boost in pairs on hot and cold water services where it may be impracticable to use a twin pump.
  
  

Negative Twin Pumps

A negative twin pump is designed to be installed into both the hot and cold water supply boosting both equally. Ideally installed on the floor of the hot water cylinder cupboard they can be used to:

• Boost hot and cold water services to complete bathrooms, cloakrooms and kitchens.
• Pressurise the supply in applications such as loft conversions, where the outlets are higher than the water source.