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Hi John, as you said that the outlet should be lower than the inlet I took your advice and tried that option first. I measured the original ‘overflow’ outlet and the centre of the hole was only 5.5cm below the rim of the tank. I drilled a new hole centred 11.5cm below the rim and re-fitted the...

Hi John, many thanks; a trip to the merchants beckons. Not sure which option I'll try first but I'll let you know the outcome. Regards

Hi, great input – certainly not bovine derived. . So are you saying that the pipe should be effectively a dog-leg of maybe 30cm vertically downwards from the outlet position and thence outward in a straight run to the eaves? Or would my suggestion of lowering the outlet point be another...

Hi again, as I said in my OP the overflow and inlet are both approx 8cm below the rim. If I lowered the outlet point to just above the nominal water level do you think the extra pressure would be enough to dislodge any small air-pockets and get the water flowing out properly? Is it a trapped...

Hi, many thanks for your interest; the pipe is new; absolutely no blockages or kinks. As I said in my OP once the water starts to flow (after my intervention)it absolutely flies out like a firemans hose but returns to its sedate flow once air re-enters the pipe.

Hi, many thanks for the reply but I sincerely believed that my description that the pipe runs from tank to eaves at an angle of 30 degrees 'below' the horizontal was correct. But many apologies if it is my terminology that is incorrect or confusing; I should probably have said "the pipe runs...

Remove as much silicone as you possibly can using proprietary silicone 'eater' and clean thoroughly. Carefully mask off behind the tap; on the tile and on the tap itself and carefully fill the very small 1-2mm gap with good quality white silicone. (I find 'Forever White' from S/Fix to be...

Hi guys, I have recently replaced an old dripping ‘float valve & ball’ in my loft ‘Domestic Hot Water’ feed tank with a complete new assembly and whilst testing the ‘soundness’ of the connection through the plastic wall of the tank by holding the ‘ball’ submerged and filling the tank above the...