N.Design Studio

Pond heating

Circulating pump

A circulating pump is fitted in the same way as it is fitted to the central heating system in your house, and in this case it is used to circulate the hot water from the boiler through the heat exchanger.
Air vents as fitted This photo shows the Grundfoss 15/50 as fitted to Mark's system.
This seems to be the most popular pump at the moment, but your dealer may have a different make which will be just as suitable.
Isolating valves usually have to be purchased seperately but are necessary as the system can be isolated if the pump has to be removed for any reason.