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New boiler within the last year. I think an additive was added to the system and he fitted a sludge filter below the boiler. Boiler is on ground floor. Y valve on 1st floor. How water coming out both sides of the valve.

No, would like in the future. Thinking downstairs would all be underfloor and controlled separately. 1st & 2nd could be zones or just use TRVs?

Do not like the sound of any of them. Balancing - unlikely as they have been hot before Sludge - possible. I guess I should power flush? TRVs - nope, they are old valves Failing pump - nope, we have one in the system boiler and another on the system Airlock - perhaps. Do I just bleed the valves...

Hello, At the moment we only seem to have 2 hot radiators, 1 luke warm radiator and 6 cold radiators on our ground floor. What is the problem? Radiator on 1st and 2nd floor seem ok. Boiler is new, radiators are old. Thanks, Matthew

Can it be replaced so it is not visible? What are my options here. My house has a vent stack not too far away.

I wondered if it was a vent but it does not smell at all. Presumably a vent would vent bad odours?!

Removed some ivy to discover an ugly black pipe near drain manhole cover. Is it ok to cut this off and cap or cut below ground level and cap? It looks like the drain receives surface water (blue line) and is a combined sewer (red line) and a private combined sewer (brown) joins the combined...

Thanks all for your help.

This option sounds most fun!

Thank you. If I could borrow an SDS hammer drill, would drilling holes or using a chisel bit make my life easier?

I would like to breakout and dispose of half this patio, including a concrete slab and the end of my garden. Idiot steps please! Can I have an idiots guide on how to do this without needing to buy anything too expensive. Could be tempted to invest in a few tools if they will make my life...

A job for tonight!

3 port valve is Y Plan. Programmable timer is very vintage so maybe this is the problem? Going to be replaced with a Nest. Thank you everyone who has responded. I am learning so much. Forums are great.

I think the benefit of having those components covered under a 7 or 10 year warranty within the system boiler and saving a bit of space is worth going system for us.

Those are minimum values. See table attached.

True. I do not know if kW is usually quoted as heat input or heat output. The front of the boiler gets warm/hot so efficiency is not a strong point hahah.

BTW - Existing vintage boiler is 37kW

5 or 6 meters.

15 large radiators. 5 small radiators. Future extensions may add 2 large radiators. Going for a system boiler, not a combi. Gas pipe is 22mm. Installer thinks this is ok.

Age of pipework is a mixed bag. Age of radiators is old. The existing system has a separate expansion vessel and pump so is already somewhat pressurised. House is 2400sqm. Some rooms have 3m high ceilings. Walls are solid. Does 37kw still seem high?