I recently changed some taps on a system with a megaflo unvented cylinder (taps were ground floor kitchen, megaflo first floor airing cupboard in case relevant.)
The pressure at the bath taps before starting was insane. Terrifyingly forceful. He whacked them on full to show me that it caused the inlet valve in WC to let by which I changed while there.
I must admit I'm overly cautious with the parts of systems I don't work/on install and so even if there is a valve (a lever on the combination valve I believe?) to isolate mains supply to unvented I have tended to just isolate incoming mains and run hot and cold taps to change them for fear of interferring with things I don't know about.
This has worked in the past and I have asked on here in the past if this is fine to do and have been told yes (by Tamz, no less.) Please correct me if this is wrong. I did note this time it seemed to take much longer than usual for hot to finish running. I may have even done a bit of a live catch toward the end having lost patience.
Customer emailed and says his water pressure is now much less from kitchen taps (i probably should have clocked this but just check they were live as it was a late job and was losing my marbles)
I've asked him to check if it's reduced at other taps, as he didn't say. He says kitchen "taps" in email, not tap, but all he then describes is now having to wait too long to fill up a washing up bowl so maybe he means just hot? If it's cold as well wouldn't that just mean the stopcock isn't fully open? I'm pretty sure I didn't make that mistake...but who knows...
Either way I had this before couple years ago. Turned off mains, drained out hot and cold kitchen taps, turn mains back on, pressure issues at some taps and not others.
I can't remember what happened in the end. May have told them to get an unvented guy to look. But this seems silly. Seems like you should be able to turn the water off and on without needing a visited from an unvented guy afterwards.
What is likely this pressure issue and is there something I should be doing/not be doing/warning people about on these jobs? The taps were suitable for the system by the way.
Thanks
The pressure at the bath taps before starting was insane. Terrifyingly forceful. He whacked them on full to show me that it caused the inlet valve in WC to let by which I changed while there.
I must admit I'm overly cautious with the parts of systems I don't work/on install and so even if there is a valve (a lever on the combination valve I believe?) to isolate mains supply to unvented I have tended to just isolate incoming mains and run hot and cold taps to change them for fear of interferring with things I don't know about.
This has worked in the past and I have asked on here in the past if this is fine to do and have been told yes (by Tamz, no less.) Please correct me if this is wrong. I did note this time it seemed to take much longer than usual for hot to finish running. I may have even done a bit of a live catch toward the end having lost patience.
Customer emailed and says his water pressure is now much less from kitchen taps (i probably should have clocked this but just check they were live as it was a late job and was losing my marbles)
I've asked him to check if it's reduced at other taps, as he didn't say. He says kitchen "taps" in email, not tap, but all he then describes is now having to wait too long to fill up a washing up bowl so maybe he means just hot? If it's cold as well wouldn't that just mean the stopcock isn't fully open? I'm pretty sure I didn't make that mistake...but who knows...
Either way I had this before couple years ago. Turned off mains, drained out hot and cold kitchen taps, turn mains back on, pressure issues at some taps and not others.
I can't remember what happened in the end. May have told them to get an unvented guy to look. But this seems silly. Seems like you should be able to turn the water off and on without needing a visited from an unvented guy afterwards.
What is likely this pressure issue and is there something I should be doing/not be doing/warning people about on these jobs? The taps were suitable for the system by the way.
Thanks
