Hallo,I have a few basic questions.
CH/HW system is a pumped system ,vented(wallstar boiler)
1 The last two rads stay cold at the bottom so I assume they need flushing/cleaning.Is there a best system cleaner/additive?(sludge removal)
2 CH on its own with pump on low power no problem,pump on 2nd or third power setting then water is pumped out of the vent.HW on its own,no problem,but if HW and CH on together then water comes out of the vent.The top of the vent pipe to the top of the water level is @13",I have seen a figure of 18" as a minimum so should I extend the vent higher,if so by how much?
Maybe the 3 way valve needs replacing?
Please ask for more info if needed.
Thanks
CH/HW system is a pumped system ,vented(wallstar boiler)
1 The last two rads stay cold at the bottom so I assume they need flushing/cleaning.Is there a best system cleaner/additive?(sludge removal)
2 CH on its own with pump on low power no problem,pump on 2nd or third power setting then water is pumped out of the vent.HW on its own,no problem,but if HW and CH on together then water comes out of the vent.The top of the vent pipe to the top of the water level is @13",I have seen a figure of 18" as a minimum so should I extend the vent higher,if so by how much?
Maybe the 3 way valve needs replacing?
Please ask for more info if needed.
Thanks