when and how do i bleed my pump

[mgally]

The hot water from my boiler is making its way up the cold feed pipe into the c/h f+e tank causing it to overflow, the f+e pipes are just before the pump....ive tried everything but the only thing left to do is bleed the pump itself

do you do it when the pump is going or when its off.
do i do it with the system hot or cold
how do i do it, is there a valve or do i release the big silver screw.

mike

 

[breezer]

no idea when, but you do undo the big silver screw

 

[Rob]

if your tank is overflowing then theres too much water in the system. either your ball valve is letting by worse a problem with you hotwater cylinder

 

[mgally]

ball cock is fine and the f/e tank only supplies the heating circuit, there is a larger cold water storage tank for the cylinder water.....if there was a problem with the cylinder then wouldn't it be the cold water tank that would overflow ?

 

[Rob]

turn the mains supply off to your heating tank. drain out excess. what happens does the water level rise?

is your big tank higher than the f+e tank

 

[Bamber gaspipe]

The vent pipe from your heating system is emptying into your small expansion tank in loft, is that correct? System blocked may need a powerflush.

 

[chrishutt]

The hot water from my boiler is making its way up the cold feed pipe into the c/h f+e tank causing it to overflow

Not up the vent pipe, according to the OP.

 

[chrishutt]

He sounds as if he knows what he's talking about, apart from stuff about bleeding pump.

What height is the cold feed tank to the hot water cyclinder in relation to the CH header tank?

Does the hot water rise up the feed pipe all the time or only when hte pump is running?

 

[Bamber gaspipe]

What height is the cold feed tank to the hot water cyclinder in relation to the CH header tank?

Who cares? if the were was a problem regarding header height Blah..Blah..surely the prob would have occurred earlier? It`s a blockage.

 

[chrishutt]

As rob884 indicated above, it could be a leak through the cyclinder coil, if the DHW feed tank is higher than the CH header tank. My money's on that explanation.

The OP does say that the pump is just after the F&E pipe connection (as one would expect), so how would pumping up the F&E pipe occur?

 

[Bamber gaspipe]

As rob884 indicated above, it could be a leak through the cyclinder coil, if the DHW feed tank is higher than the CH header tank. My money's on that explanation.

The OP does say that the pump is just after the F&E pipe connection (as one would expect), so how would pumping up the F&E pipe occur?

Leak in coil would be indicated by brown water at hot taps, I`m not challenging your opinion, just giving mine.

 

[chrishutt]

But it's a leak from the DHW cylinder into the coil and CH system, not vice versa.

 

[Rob]

As rob884 indicated above, it could be a leak through the cyclinder coil, if the DHW feed tank is higher than the CH header tank. My money's on that explanation.

The OP does say that the pump is just after the F&E pipe connection (as one would expect), so how would pumping up the F&E pipe occur?

Leak in coil would be indicated by brown water at hot taps, I`m not challenging your opinion, just giving mine.

this is all down to tank heights. this is the reason why the cwsc should always be higher to the f+e to prevent brown water at the taps

 

[Bamber gaspipe]

But it's a leak from the DHW cylinder into the coil and CH system, not vice versa.

Thats your explanation then is it...the Hot water tank is leaking into the coil thus causing the f&e to overflow?.. I`m happy with that. a damaged coil would still be indicated by discolouration at Hot taps, if the cylinder can leak in..what will stop coil from leaking out?

 

[Rob]

But it's a leak from the DHW cylinder into the coil and CH system, not vice versa.

what will stop coil from leaking out?

this is all down to tank heights. this is the reason why the cwsc should always be higher to the f+e to prevent brown water at the taps