Hi All
My system is microbore 9 single rads, Gloworm fuelsaver. Myson aereject.
All the rads on microbore have TRVs. So a low volume system.
The bathroom rad is on 1/2" pipe and didn't have TRV until a friend ( a plumber) advised me to fit a TRV when I could. This rad is directly above the boiler.
From what I can see of the system the flow and return are 3/4" going down to 1/2" at bathroom rad. 8mm microbore tapped off the 3/4 feeds the remaining rads.
There is also a 2 way valve feeding the HW cylinder.
I had a few stuck TRVs so when I drained down to replace/repair these I fitted the bathroom rad with a new TRV.
Severe kettling was the result, although slight occasional kettling before.
Kettling only happens on the third or fourth cycle of the boiler on start up from cold when HW is off. Selecting HW on appears to cure the problem.
When the system is thoroughly hot there is no kettling, even with HW off.
I have had 2 litres of Noise reducer in the system for 3 weeks with no noticeable improvement.
Any ideas please?
My system is microbore 9 single rads, Gloworm fuelsaver. Myson aereject.
All the rads on microbore have TRVs. So a low volume system.
The bathroom rad is on 1/2" pipe and didn't have TRV until a friend ( a plumber) advised me to fit a TRV when I could. This rad is directly above the boiler.
From what I can see of the system the flow and return are 3/4" going down to 1/2" at bathroom rad. 8mm microbore tapped off the 3/4 feeds the remaining rads.
There is also a 2 way valve feeding the HW cylinder.
I had a few stuck TRVs so when I drained down to replace/repair these I fitted the bathroom rad with a new TRV.
Severe kettling was the result, although slight occasional kettling before.
Kettling only happens on the third or fourth cycle of the boiler on start up from cold when HW is off. Selecting HW on appears to cure the problem.
When the system is thoroughly hot there is no kettling, even with HW off.
I have had 2 litres of Noise reducer in the system for 3 weeks with no noticeable improvement.
Any ideas please?