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Hi Just swapped out my traditional tank fed HW system for a 35KW combi capable of 14.5 l per min on 35deg temp rise. Incoming pressure and flow rate are ok - 3bar and 15 l per min. 1st DHW tap from combi is downstairs loo and flow is great. As soon as it goes upstairs the DHW flow to the...

Hi I inherited a 10yr old system. It was pumping over when I moved in and sludged up. The water was orange so I presume pumping over for some time. I have drained it a couple of times, & cleaned it out but still have the following issue: Only when CH & HW is on at the same time the system...

Folks 2 problems / questons. 1. I have something called a Spartan Mainstream Thermal Store (cant find ANY info anywhere about it) which is about 9 years old. According to the brief operators guide it is preset to store h/w @ 80c . I am assuning this is via the cylinder stat. When heating...

I have a 9 year old system, with seperate boiler. After changing a rad and cleaning out the system, I have the following problem: hot water is fine and the store heats up well. When the Central heating pump comes on, the tank makes 2 noises like air is expanding or something, (sounds like...