Hi
I am thinking of buying a new back boiler. I have noticed there are some back boilers with 2 pipe connections at the back and others with 4.
Can anyone tell me what the difference is between 2 and 4 connections
Thanks
I am thinking of buying a new back boiler. I have noticed there are some back boilers with 2 pipe connections at the back and others with 4.
Can anyone tell me what the difference is between 2 and 4 connections
Thanks