Hi boiler pressure rising slowly never going back..

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Hi got problem with boiler..pressure rising after shower and never going down..have to drain radiator often.. read on web that two valves of water shbe closed..black one is but blue its opened..can someone help can't upload pictures..thank you
 
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We need to know what make/model of boiler.

Just drag and drop the pictures from your desktop into the box
 
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Ideal mini c24 old boiler was fixed few months ago
 
hi uploaded pictures hopefully someone can see blue valve please help what to do next.. thank you
 
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Remove the silver braided hose, it should just be finger tight. There may be water in it but there shouldn't be anything coming out of either of the pipes/valves. Leave the hose off for a while and check there is nothing at all coming out of the valve with the black handle.
 
hi thank you for answer only few drops in silver hose.. looks like black valve its ok... boiler have to be off or on? left hose undone for a while ..
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what to do next cos no clue thanks
 
If the pressure is still rising with that disconnected like that it sounds like your plate heat exchanger is pin holed
 
Blue valve is meant to be like that, not an issue.

Does it drop at all after the boiler's been off for a while?
 
thanks for help guys.. pressure is not rising any more.. looks like dropped by 1/10 Bar.. boiler its off and left hose undone for now.. will update shortly if drops more ..
 
yeah looks like no change to pressure after 20min of boiler off and hose off.. maybe Im going to drain radiator to 1.3 Bar from 2.4 and leave hose off maybe that will help keep pressure some how..
 
The hose is not supposed to be left connected anyway, though most people do Admittedly
 
yeah looks like no change to pressure after 20min of boiler off and hose off.. maybe Im going to drain radiator to 1.3 Bar from 2.4 and leave hose off maybe that will help keep pressure some how..

Nope, leave it for now and see if it drops, if it does then that points towards an expansion issue.
 
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Ok going to look at it every 20min still same 2.4 Bar shows.. will post here.. just noticed drop of water on one of the pipes...its main copper pipe with no valve on it.. looks like goes straight to boiler.. i can see was leaking a bit for a while .. stains on manual..great
 
The hose is a flexible hose to enable it to be disconnected whn not is use. It should only be connected when the system is being re-pressurised.

Historically the reason for complete disconnection was to ensure that water from the radiators could not under any circumstances contaminate the water in the water mains.

This requirement seems to have been removed and the task of preventing contamination is now achieved by non -return valves,
 
That's a cheap filling loop that doesn't comply. Compliant loops have 2 valves on them and the double check (non return) valve is fitted on the cold mains side.
Since the cheap loops only have 1 valve the double check valve gets fitted to the heating side...where the mechanism gets cooked and contaminated by the system water.
When fitted in such a way it's common to find the double check valves no longer function after many years...the OP was lucky when they disconnected the hose...water at system pressure could have poured out.
The water regs haven't changed for 20 years regarding loops...2 valves are needed (and the hose disconnecting) or an equally robust method eg. a type CA backflow device (that some manufacturers use on their integrated loops).

Looks like an Ideal mini (a Biasi boiler really) with the water running down the hot domestic outlet. Pop the front panel off and see where the leak is.
 

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