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I just found an unopened 1 litre of Sentinel x100 that I bought around 2018. Still completely sealed in the clear plastic bag packaging. How long does this keep for / can I still use it?

What inhibitor would most of you pros recommend? I've just had to empty the whole system again after we moved a GF radiator.

What is the reason they put shingle stones around a pipe underground? Is it purely for allowing drainage from overground?

Thanks. Could you pls clarify the last two parts of your answer. I’m a DIY householder not a professional plumber. Thx.

Few additional questions: 1. what’s a hex replacement as someone commented before my last post? 2. Is it recommended to ever drain and flush out one’s complete central heating system (as a homeowner) once every few years to clean out potential dirt build up? I appreciate that the more fresh...

**** FINAL UPDATE **** So I finally got it sorted after 2 weeks of no hot water and intermittent heating. Had a power flush done at a cost of £470 for 13 radiators / towel rails. Each rad flushed individually whilst all the others were closed off (and the whole system rebalanced at the end...

What's a hex replacement?

thx

Thanks. Yes, that is my issue i.e. I dont have a brick wall coming up to the top of the loft floor hence the lack of cavity wall to put this frame into. But someone said to me that you can get off the floor toilets which dont have to be wall mounted but as you say, have to build a plywood...

https://www.pinterest.ie/pin/277604764507113261/ Here's your levitating toilet.

Apparently you can get toilets which are not wall hung but have a frame of other sorts. Clearly you dont know about them.

Any suggestions please for a toilet which is not wall hung using a Geberit frame but is still off the floor? this is for a loft bathroom which has only a 200mm or so thin wall.

I actually had 4 spare Sanlumia IP65 downlighters spare from when I built a new kitchen extension 4 years ago and as I mentioned and uploaded the earlier photo. However, it looks a bit ugly as the home is small and the bulb is further recessed in which prevents light from escaping. Hence I...

So I ended up buying this downlighter from tool station. https://www.toolstation.com/fire-rated-cast-gu10-downlight/p49149#full-desc I thought that because it had a 60 minute fire rating they are class as IP65 but it didn't mention any of this on the website but on the box it's rates as IP 20...

What is that gold thing on the central heating return if it’s not a magnetic filter? Because my home emergency policy won’t cover the replacement of the plate heat exchanger (which is now clogged) until I do a power flush, I still need to get this done asap. not sure how me trying to do a...

What would it cost me to get a power flush done? I have 14 radiators across three floors which including three towel radiators. is there any risk to damage or burst to internal pipes when doing a power flush? What bar pressure do they operate at?

It has safety cut outs preventing it from getting any hotter and the fan throws out excess heat, so it’s fine. But that still needs sorting. The plate heat exchanger is blocked.

By open vent I take that to mean a small water tank in the loft? If so then no. It’s a sealed system and we top it up when it falls below 1 bar with a filling loop connected to the boiler. The boiler has a 40 litre tank combined in the combi boiler system itself.

I recall the gold filter thing was cleaned out during the last service in Aug 2020. Was planning to do the next service this summer.

It is never been “power flushed” if that’s what you mean. My parents have owned the house since 1970 but of course the system has been drained lots of times since then. Probably emptied completely and refilled some 3 or 4 times since 2017 when the new boiler went in at a different location...