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Hi all, I ordered a techflow positive pump and the supplier sent out a negative. its twice the price, and in the future i plan on converting the loft. my question is can i use the negative pump even though its a positve tank? thanks mark

to be honest No. just presumed it would be ok. it must be circulating for it to be getting hot right?

sorry what do you mean? the central heating is pumped, what can i do to resolve it?

Not at all, Its a low height ceiling, understairs. the radiator only just fits. the pipes had to come from ceiling so with restricted room it was easier to run flow at top and return down the inside wall and to the bottom. you don't actually see more than 4" of pipe either end

i Have just installed a towel radiator, feed is at top and flow return is at bottom. top is geting nice and hot, and cold at bottom any ideas?? the top feed comes straight from ceiling, and the flow return comes from ceiling and enters the bottom of the rad. i have bleed the...

i Have just installed a towel radiator, feed is at top and flow return is at bottom. top is geting nice and hot, and cold at bottom any ideas?? the top feed comes straight from ceiling, and the flow return comes from ceiling and enters the bottom of the rad. i have bleed the...

That's not worked, and boiler has cut out. The pump became louder. Is it possible that the pump is no longer working efficently? I really apreciate your help

Ok thanks. It's circulating now, but have 2 radiators getting no heat. The rest are nice and hot. Would this pipe solve that problem? You see it's already been power flushed once. As the system had no inhibited in it. I also think it needs to all be balanced

So just to recap, that's the pipe that runs up to vent the take, am I right in saying if it's blocked the system won't vent causing air in system?

Ok I will have a look, as it is I can see the pump but fear the pipe u mentioned joins under the floor board. So I am looking to just replace the vent pipe? Can I not just flush that pipe by undoing it and running a hose through it? Thanks

This section, would it be by the cylinder. I can see 3 pipes one they all join up to a diverter. Thanks for your advice, I turned down pump to one and it's now trying to heat. Not sure if this still means there is a blockage thanks to you all for your time nogoodfaultfinding if...

Yeah all rads are nice and full, and pressure looks good! I have now shut off all rads but 1 to increase flow on flow and return pipe.

I put the hose pipe in the tank and pushed it against the outlet. It then gave me pressure on all rads. I had tried from the drain offpoint without luck!

Just put cleaner in it, if I drain it I'll lose it. I just can't believe how difficult this is. It's a crap system! The water gets nice and hot to pump. Makes it to the feed of the only radiator left on and the dies. When I drain the water from the return of boiler it flows fine. It does...

No the boiler keeps cutting out,

Ok cheers guys! Gate valve is fine. It's filling from tank in loft, had to use a hose pipe to get it going! I don't know how to clear the blockage. I am wishing this was a combi. I just can't think what to do. Last time I hit the pipes a few times and it worked but this time it's...

It's a worcester greenstar si. Header tank in loft. I feel like I have tried everything. I have left the pump valve slightly open as every now and the I can hear air. I have used the drain at boiler. And the bleed vent at the top of it, which let's out steam as the boilers overheating because...

After looking at several things, managed to get the heating to work. But drained it all down to add a cleaner, but now the boiler keeps cutting out again! Sure it's air trap, just can't see any way to get rid of it. Done all bleed valves etc. Tried at the boiler to. Any recomedatios