Protecting Combi boiler

[lesmuscroft]

What equipment do i need to increase the strength of antifreeze in my combi boiler.I know it is a type of pressure container but i don't know where to purchase one or what it is called.Is there a test for the strength of antifreeze.?????

 

[ecowarm]

You can convert a pressure garden sprayer. I did one last year cut hose and found a 10mm x 1/2"bsp compression fitting fitted so was able to join to the filling loop.
As for testing glycol content in system a refractometer is a bit pricy or [DLMURL="http://www.toolmix.com/browse/product.asp?pid=71625&s52cnc=FROOGLE-UK&s52r=FROOGLEUK"]Sealey Propylene Glycol Antifreeze Tester - Disc Type[/DLMURL] would do.