Tiger Loops

[Bunker]

Why do HRM void your warranty if a Tiger Loop is fitted? How come they dont need one but all other wall hung boilers do (assuming the tank is not high)?

 

[lame plumber]

Ask them, never heard of this before.

 

[zzzjim]

Some just seem to love change , to check you read up ! ( accountant/llegal twist )

 

[MarkOil]

because HRM are very clever, both Grant and Worcester have no idea lol. the trick I have heard is all to do with the air bubble in the clear flexi hose. I think it kinda causes an airlock maybe?!? they all do have a non return valve in the line as the oil feed enters the casing.