Using toilet brush in cistern

on various plastic bits and rust on screws. Why would it get dirty anyway
That is what surprises me.how much black stuff eventually collects out of mains water after 10years.mains water is not spotlessly clean.
 
do people really worry this much about their toilet cisterns. crikey.
this might explain why I’m the only normal person on here.
 
That is what surprises me.how much black stuff eventually collects out of mains water after 10years.mains water is not spotlessly clean.

The black stuff must be coming from the pan. The siphon probably got contaminated. This happened to my car once. The garage put their sh*t in my wiper tank. The black stuff started growing in it. It needed two full bleach immersion treatments before it was fixed.

The mains water in my area seems clean apart from lime scale.


do people really worry this much about their toilet cisterns. crikey.
this might explain why I’m the only normal person on here.

If you live long enough, you too will be a cistern expert. When it goes wrong, you will be all over it. In time, plastics break.
 
The black stuff must be coming from the pan.
And travels back up a 2ft long inch and a half pipe ..Not convinced on that theory.Seen loads of cisterns over the years.Some blacker than others,down to how contanimated mains water is.
 
And travels back up a 2ft long inch and a half pipe ..Not convinced on that theory.Seen loads of cisterns over the years.Some blacker than others,down to how contanimated mains water is.

Depends if the black stuff is biological. If it is then it needs food and will grow everywhere regardless of distance. Lots of cleaning products contain chemical food. If you use car washes and see green stuff growing on window rubber seals, the reason behind it is the same. Stuff grow to consume the available food. The mains water should be fairly well controlled to not have the chemical food in it. If the black stuff is slimy, then it's biological.
 
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Most cisterns I come across have some muck in them..
Years ago, I had a pee in the staff toilet at work, flushed the chain and while I was washing my hands I looked own and there was some poo in the bowl! I flushed again - more poo! Lifted the cistern lid and some dirty retarded trainee with a grudge had had a crap into the cistern. What’s more, I could tell you what he had for tea the night before. Sweetcorn.

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I did some testing on cistern blocks, and the conclusion is there is no justification for stirring the cistern water to help dissolving the cistern block. I used aldi blue blocks. When directly under the water inlet, it lasted 4 days. When at max distance from the inlet it lasted 2 weeks instead of the claimed 4.

So, to lessen the problem of non-dissolving, you can simply place it closer to the water inlet or try a different brand.

One thing, however, I do have turbo charged gravity-fed water inlet. It produced jet engine like noise while filling :). I connected the inlet to a long thin plastic bag to eliminate the splashing noise in the cistern. This does not affect the the natural dissolving rate of the cistern block.
 
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I connected the inlet to a long thin plastic bag to eliminate the splashing noise in the cistern
Just be careful that by doing that you aren't compromising the air gap that the fill valve may require to provide its backflow protection. Some fill valves have that plastic tube as standard but they are designed specifically like that.
 
Just be careful that by doing that you aren't compromising the air gap that the fill valve may require to provide its backflow protection. Some fill valves have that plastic tube as standard but they are designed specifically like that.

Good point. The water just needs to hit a "slide" as soon as possible then flow down rather than falling down. Even an open slide would work - this will not change the air gap. I think I will make one with a plastic plumping tube. The splashing is a problem when the inlet is turbo-charged :) I quite like the quick water fill.
 
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I use a Wet Vac when possible to remove any surplus water from a cistern before dismantling it. Makes life a bit easier.

As for mains water, if you've ever seen the crews on Main Rehabilitation, carrying out the scrape and line process, the colour the water comes out when they're cleaning the pipe out before lining it is anyone's business!
 

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