Hi all. We are having trouble with water pressure from our unvented hot water cylinder tank (a.k.a megaflo/megaflow). Over time, the pressure has reduced so much that we can't get any decent flow rate from the taps in the loft. Ground floor and first floor are very powerful as you can see on the left of the video
Considering that the taps work perfectly on the other floors (albeit with a slight hint of pressure drop), could it be that our pipes are blocked up? Don't know if you can see on the video but the tap on the right pulses from time to time as though there's trapped air.
Some key facts to help:
Is there anything else that I could do or is there an easy fix?
I'm thinking of asking our plumber to do a powerflush of the water pipes (if there's such a thing) when he flushes our heating system.
Considering that the taps work perfectly on the other floors (albeit with a slight hint of pressure drop), could it be that our pipes are blocked up? Don't know if you can see on the video but the tap on the right pulses from time to time as though there's trapped air.
Some key facts to help:
- The cylinder that we have is the one with an external expansion vessel which we have changed recently (a few weeks ago)
- We have changed the pressure reducing combination valve last year
- I have tried removing any potential air bubble in the tank be turning off the stopcock, opening all taps, opening the pressure relief valve
- Cylinder brand: Zilmet
- Expansion vessel brand: Reflex
Is there anything else that I could do or is there an easy fix?
I'm thinking of asking our plumber to do a powerflush of the water pipes (if there's such a thing) when he flushes our heating system.
