Sauermann Delta Pack White Condensate Pump Kit, HVAC Condensate Removal Unit, Air Conditioning Drain Pump, Mini Condensate Pump Set

Condensate pumps remove the water produced by condensing boilers, air conditioning units, refrigeration equipment and dehumidifiers when it cannot run to a drain by gravity, for example where the appliance sits below the drain. Condensate flows into the pump's tank, a float switch starts the pump at a set level, and the water is pumped through a small hose to a suitable drain.

Types

• Tank pumps: compact units with their own reservoir, sized by tank volume, flow rate and maximum head, which is the height they can lift water. Used with boilers and larger air conditioning units.
• Mini pumps: slim pumps made to fit inside or beside an air conditioning indoor unit or in its trunking, where space is tight.
• Boiler kits: pumps made for a particular boiler range, often as a direct replacement part.

Choosing and fitting

Match the flow rate to the appliance and the head to the height and length of the discharge run. Condensate from gas and oil boilers can be strongly acidic, so check the pH range the pump is rated for and fit a neutraliser where the maker calls for one. Most pumps have a safety overflow switch that can shut the boiler or air conditioning down, or trigger an alarm, if the water level rises too far. Keep the pump where it cannot freeze, and test the alarm when commissioning. For boilers, install the condensate drain to the manufacturer's instructions and BS 6798, ending inside the building where practical. Any electrical connection with a bare cable end should be made by an electrician, and work on the boiler's gas parts must only be carried out by a Gas Safe registered engineer.

For other circulating and lifting pumps, see pumps, or browse boiler spares.