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Thanks madrab. Did what you suggested & it's not the boiler. Yesterday I was in the house & topping up the heating every couple of hours as the pressure was dropping from 2 bar to zero that quickly. Then I noticed that the cold water tank in the loft was over flowing. On checking this tank it's...

Hi WJF - ok, maybe the radiator isn't completely empty but it's 90% empty. Does that make any difference? I thought that the siginifcance was that most of the water has drained away rather than work out what % had drained away. Hi ollski - yes it's a Greenstar 30cdi Classic.. The condensate...

When the system is on and the radiators are warm I can feel warm water at the bottom of the empty radiators but the radiators go cold about 2 inches from the bottom and all the way to the top. When I bleed the radiators I can feel the warm water moving up the rad. No reason for 2 bar other than...

Hi I have a pressurised system for both CH and Hot water with a tank. The boiler is a Worcester Bosch Greenstar. A few years ago I thought I had a leak in pipes buried in the concrete floor, so had new pipes fitted dropped from the first floor. All good and system working again. Now a few...

New floor has a dpm however the thought from my builder is that the damp might be coming from the walls. The external walls have a dpc but no idea with internal ones. Yes the new floor should be dry by now....

I had my kitchen replaced about 18 months ago & the floor replaced with a new concrete one. House is Victorian so the previous floor had no insulation or damp proofing. I was going to fit Karndean or similar vinyl flooring however the concrete is still a bit damp. Builder suspects there...

Thanks The boiler & pump is on the ground floor & the radiator in question will be on the 2nd floor (loft room) so I just need to move the expansion tank to be higher up the loft room wall than the radiator...but on opposite sides of the wall :-)

Its a Potterton Kingfisher Mf - no doubt more details are inside.

How much higher than the highest radiator does the expansion tank need to be in a pumped CH system? I'm thinking it only needs to be a foot or so but prefer not to guess. Anyone with advice? Thanks

I'm not planning to move the cold water tank. The loft room ensuite is fed by mains for the sink and toilet and by a pumped tank feed for the electric shower. The CH header tank will also be fed by mains. Mains pressure here is not very good but good enough for sinks & tanks, just not...

Put a sheet of polysyrene on a stand so that there is cover over it but allow for air flow to keep the unit cooler when operating?

I have a typical central heating system with an expansion tank in the loft in my 2 storey Victorian house (ground & 1st floor). Having now got a loft room, to add a third storey, it has a small loft space aove this new room. If I move the expansion tank into this space, will I then be able to...

That's good news. Thanks :D

I'm thinking of replacing my open vented system with a sealed system. Currently the room in the loft has to be heated by an electric heater as the expansion tank is the same height as the room. If I have a sealed system could I install a radiator in the loft room to heat the room insted...

mains pressure is low - around 1 bar first thing in the morning but then drops when the rest of the town wakes up. I'm at the top of a hill with a 3 storey house & the loft room has one of the showers. I already have 2 electric showers running off mains water but they sometimes don't work...

I currently have 2 50gallon cold water tanks in the loft, each feeding 2 showers. I am going to upgrade the showers to be pumped as the pressure is a bit weedy and the showers rather feeble. I have been told that I ought to allow 50 gal per shower so should I have 200gal in the loft? Seems...

I will be fitting a negative head single sided pump to feed cold tank water to my electric shower. Any recommendations as to which pump is good? Thanks

Hi I already have the electric showers of 8kW. The problem is that neither work well as I live on top of a hill and the pressure is too low for them. The downstairs one is in the habit of the heater stopping mid shower especially if someone else in the house uses any water. The one in the...

I'm aware that I need to switch to tank water from mains - should have said that. The mains pressure is too low to get the electric showers working properly. Electric showers should be fine with pumped tank water - that's what an electric power shower is after all. I would have thought that...

As far as I can find out there is no reason why I can't fit a single ended pump to overcome low water pressure problem in the house to use with an electric shower. I actually have two electric showers - one in the loft and 1 on the ground floor of my 2 story house. Is it OK to fit 1 pump to...