S
stewm
The dreaded banging from heating pipes during the night, tried pump speed, bleeding rads all seams in order but banging continues....suggestion most welcome
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I may be missing obvious
Discuss I may be missing obvious in the Plumbing Jobs | The Job-board area at PlumbersForums.net
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Are the pipes running behind your headboard?
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Are you in a house or flats ? it may not be your pipes that are the problem !
S
stewm
Hi apologise for lack of detail, but here goes yes a dhw cylinder but only two port valve on this as feed is t off main htg line, and yes trvs on rads but surely if anything these are going to open during the night, its also a floor standing boiler...hope this is a bit more info
B
Bernie2
One assumes that having a F & E tank its an oldish system? It is not necessarily so of course, but perhaps likely with the more widespread use of condensing combi's or ordinary combis now days. So being an older system, one assumes the banging has only just started?
It is possible the ball valve in the F&E is stuck and not filling the system for one common reason. Could be water hammer but possibly unlikely as there are usually very few loose jumper screw down valves with worn washers and loose jumpers on a central heating system one of the most common causes. And the ball valve in the F&E tank another common cause of water hammer is hardly likely to be opening and closing all the time unless there is a leak on the system.
I am of course assuming no pipework has been disturbed anywhere and it is all properly clipped? The usual common causes though are air in the system, no water and over heating.
Banging in a c/h water system has a few possible causes, but the simple explanation is that if you stop anything travelling you have to put as much energy into stopping it as it uses to travel.
Its one of Newtons Laws of Dynamics. The thing is if you run say a car into a wall it rebounds and water does the same but in rebounding, it rattles and bangs anything loose i.e pipes, worn washers or valves. Ball valves do the same sometimes just about anything that closes down a water stream that is travelling fast will do it. But a central heating system like the one you describe doesn't really have mains water pressures the most common for water hammer. So the banging is more likely to be air. That said it could also be kettling or boiling in the boiler causing explosions which can also be caused by boiler design, sludge in the system, TRV's, pump or port valves. The thing is it could be any of many things and possibly more than one thing. But check the F&E tank as it is probably the easiest to do.
It is possible the ball valve in the F&E is stuck and not filling the system for one common reason. Could be water hammer but possibly unlikely as there are usually very few loose jumper screw down valves with worn washers and loose jumpers on a central heating system one of the most common causes. And the ball valve in the F&E tank another common cause of water hammer is hardly likely to be opening and closing all the time unless there is a leak on the system.
I am of course assuming no pipework has been disturbed anywhere and it is all properly clipped? The usual common causes though are air in the system, no water and over heating.
Banging in a c/h water system has a few possible causes, but the simple explanation is that if you stop anything travelling you have to put as much energy into stopping it as it uses to travel.
Its one of Newtons Laws of Dynamics. The thing is if you run say a car into a wall it rebounds and water does the same but in rebounding, it rattles and bangs anything loose i.e pipes, worn washers or valves. Ball valves do the same sometimes just about anything that closes down a water stream that is travelling fast will do it. But a central heating system like the one you describe doesn't really have mains water pressures the most common for water hammer. So the banging is more likely to be air. That said it could also be kettling or boiling in the boiler causing explosions which can also be caused by boiler design, sludge in the system, TRV's, pump or port valves. The thing is it could be any of many things and possibly more than one thing. But check the F&E tank as it is probably the easiest to do.
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If if it is a boiling issue , setting power a little lower may give clues .
Do you have a tank of steaming hot water in morning , so a tank stat might be an idea
if boiler cannot be left on a lower setting
( FIX ? )
(Less heat , or More flow ... something may be getting blocked )
Do you have a tank of steaming hot water in morning , so a tank stat might be an idea
if boiler cannot be left on a lower setting
( FIX ? )
(Less heat , or More flow ... something may be getting blocked )
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