Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!
Last seen: Aug 2, 2026
@bobtskutter Hi Bob. Daft mistake with the valve. The red expansion tank is not attached to the hot water cylinder. I can't find the PSV you menti...
@bobtskutter Thanks. Pressure remains steady at 1.2 with the system idling after House Heating. No idea what's trigering the drop in pressure. I h...
@bobtskutter Hi Bob. Installer asked me to check the pressure relief valve on the top of the Red Expansion tank. Only air came out; pressure was 1.5 a...
@bobtskutter Thanks. Chasing up my installer.
@bobtskutter So, just to be sure I understand, it shouldn't drop to zero when the heat pump is idling? In heating mode, it seems to be staying on or...
@bontwoody Thanks. I did top it up a few days ago and that's what made me look at it today. If the pressure is gradually rising to 1.9 when the pump...
@toodles Just to close this track, my installer was happy with the pump speed adjustments. Primary Grundfos Pump on speed setting 1 and Secondary Wilo...
@transparent Thank you for your comments. I have insulated my loft Automatic air valves and brass connections by wraping in Topsleeve Sheep wool pip...
@johnr @transparent Thank you for your suggestions. Yesterday I found out that the Air Valves are in fact automatic so I have to be a bit more caref...
@allyfish Many thanks for your reply. I was afraid I am getting too fussy although my installer may still think so! I am surprised that there are no...
SPONSORS
Degrees of Separation
Latest Posts
-
RE: Questions about A2A for heating as well as cooling
Thank you for that very helpful and thorough response! ...
By donciccio , 6 hours ago
-
RE: Aircon - in listed buildings
@etchedpixels thanks for giving such a full and helpful...
By GrahamF , 20 hours ago
-
RE: Acond heat pump failed after four years - diagnostic quote £940 plus VAT
Another idea if the above don't work - there are compan...
By downfield , 22 hours ago
-
RE: Love veg, hate watering cans
They have their downsides but boreholes are great in th...
By ian33a , 23 hours ago
-
RE: Who's your electricity provider and what's your tariff?
@old_scientist The service engineer powered down the ex...
By Papahuhu , 24 hours ago
-
RE: Issue with Samsung Cascade System
@jamespa It's a funny system, but was out only option l...
By Renewables345 , 1 day ago
-
RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
Thanks, I like the chart, very helpful and this will de...
By baroquebank , 2 days ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
Production resumed to normal once the issue ...
By MK4 , 2 days ago
-
RE: Digest of UK Energy Statistics
That sounds painful. It would be much better to charg...
By Transparent , 3 days ago
-
Hole diameter is small but hole length is also very sma...
By bobflux , 3 days ago
-
RE: Are Wind Turbines Really “Losers”?
We were sailing near a wind farm in the North Sea last ...
By Jeff , 3 days ago
-
@trebor12345 The idea is to ensure that Powerwall knows...
By Toodles , 3 days ago
-
RE: Indevolt Batteries UK Support & Info Thread
'hard limited' could be in 'admin' password protected s...
By JamesPa , 4 days ago
SPONSORS
