Discuss mystery pressure loss. in the Plumbing Jobs | The Job-board area at PlumbersForums.net
when you say pump up do you mean fill up to say 3-5 bar then isolate and leave for a couple of hours or more or do you mean pump up evPump up pressure and isolate flow and return valve, to see if you still get the drop.
yes mate done that ...okHi desrob ... You've gotto check the expansion vessel 1st to rule it out ... should be around 0.7Bar atmospheric! If it's lost it's charge it'll give the symptoms mentioned
yeah i was going to ask you were this lost water is going if the ev is charged or not,condensate operating normallyIf it's every other day and the EV is charged thats quite a bit of water loss desrob.... As sugested pressurise and turn off the iso's ... also check out the condensate trap/pipes. Obviously the pipe from the HEX should only be running water when the boiler is on. If running when off then its the main hex yeh?
Could be the heat ex, going through the condense. Not seen it before and I work on them all the time, but possible. I had 1 the other day and there was a very slight leak in the loft on a thumb vent causing the pressure lose.
heat ex or vent, don't even know what a thumb vent is and why in the loft ?That's what my money's on
yeah i was going to ask you were this lost water is going if the ev is charged or not,condensate operating normally
wow...!Internal h/e Leak dribbling through condi pipe.
Although, one to check, open sys converted to sealed sys, cold feed capped at header tank. The redundant but still live cold feed developed a few hairline cracks/leaks. Trying to find the drop in pressure was a nightmare considering I didn't expect that pipe to be there never mind being live
I didn't expect that pipe to be there never mind being live
heat ex or vent, don't even know what a thumb vent is and why in the loft ?
thanks for the lesson i now know that when someone refers to a thumb vent, they are refering to a manual vent, the job of said vent is to expel unwanted air and they are placed at the highest point in the system(not sure why)or is it because air is forced upward because of the weight of the water being heavier,hence air at high points..The pipework ran up in to the loft and fed the rads from above. It was an upstairs flat. A thumb vent it a manual vent you open to let the air out. Mainly found at the highest point on a heating system and much more common on open vented systems.
can you draw me a picture not sure what pipe your refering toohave you checked the pressure relief pipe when the heating is on? and when it is off .
copper pipe turned into wall on outside of building.
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