Switch for low pressure protection

[philip-g]

I am upgrading my Ideal Classic FF380 boiler to a sealed system. Ideal say it's ok for 3bar operation and has high temp. protection, but I wish to give it a low water pressure protection also, as a modern boiler would have this built-in.
Where can I find a 0.5bar pressure switch?
Also, comments welcome.

 

[Gasguru]

Go to any boiler spares merchant and ask for a water pressure switch off a Ferroli Modena/Domina or an Ariston EuroCombi SX29MFFICE. They use the CEME pressure switches and are more reliable than the other common pressure switch made by SIT.

http://www.cemeeng.com/index_en.htm

They are normally adjustable but preset to around 0.7 Bar...use a 1/4 female coupling. Many modern boilers don't actually have a pressure switch. Letting owners run the boiler with zero pressure helps pump sales revenue.

 

[philip-g]

Gasguru,
Thanks, very useful, very prompt.