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I think I'm convinced now, In looking at Grundfos' webpage: https://product-selection.grundfos.com/products/up-ups-series-100/ups2?tab=documentation It reads; "The (USP2) motor is based on permanent-magnet and compact-rotor technology securing silent operation and low energy consumption."...

Why do you say that? It concerns me that my old one (USP) has maximum power rating of 95W, yet the newer Grundfos USP2 only has maximum power rating of 48W. Are we sure the USP2 'upgraded' ?? version will do the same job as the older 95W model. I mean the older one is literally double the...

Just realised the Grundfos one, the expensive one, may not be suitable - see the power ratings on the photos. The cheaper one, 'boiler-m8', has similar power ratings compared to my old one. Once again, see the pics. Am I missing something here; I need to buy the cheaper one because the more...

Yes, I do have small tank in loft. I have 'bunged' (closed off?) water supply to it and system is drained. Undo pump onions? That means the nuts? When you say "open vent plug on pump", do you mean the screw on the front to vent? Now which pump should I buy? This would be a direct replacement...

The pump is 22 years old. I'm wondering as the bottom valve weeps now that I've adjusted it and will need to be replaced before flooding the system again; I'm thinking, just replace the pump too. Afterall, it is the likely culprit. If after replacing the pump and valves, it still doesn't work...

No, these are definitely draining taps. I have a garden tap around the side of the house.

I believe I just drained my central heating system by use of the outside LEFT tap. What does the right one do? I briefly turned it on and the water came out with more force.

I tried an Allen key on the bottom valve but it wouldn’t stop weeping, ever so slightly. On rotating valve back to original position it still wept. Draining entire system now. I presume to state the obvious that these valves need replaced. No I haven't checked if power getting to Water pump...

Water pump was roasting hot but no hot hotter. I tried unscrewing the big screw and rotating pump a few times to no avail. Closer view: Allan key valves above and below: I guess I should just isolate the two valves (above and below), turn off electricity (of course) and then...

THANKS FOR EVERYONE'S THOUGHTS, NO MORE NEED FOR ANY FURTHER POSTINGS. :)

I checked, the bottom (underside) of the overflow pipe is 1.3 cm lower than the water inlet. Both distances were measured from the bottom of the cistern tank. Yeah it was, I found it. I extracted the muggy water first of all by using a container: Then I had to use a handpump for the...

Thanks for noticing that, I've now adjusted, the pipe now leads into the small tank (cistern?)

It's about half full, the water around 12-15 cm in depth. My hot water wasn't on at the time I took the pics, but the hot water works fine when I do switch it on; the boiler in the kitchen kicking into action. I don't use my central heating system - EVER! The hot water cylinder (tank?) is...

This uncovered water trough, I took some photos. Any comments?

Which will give best result, cement acid cleaner or jet washing?

Are you sure, I mean I tried to scrub it off with a brush with stiff bristles?

Would this be powerful enough? https://www.amazon.co.uk/dp/B01NGU8Z32/ref=psdc_114633031_t2_B0829J32VH

What pressure would I need? Checked an amazon, there are a wide range of these devices available at varying prices.

I have, what I believe to be concrete 'stains' on my monoblock. I tried to scrub away the stain with cold water and then hot, this was the result: Anyone help?

Yeah, thanks. Was a little surprised that no one gave a link for the part on this forum.