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j
Oct 30, 2016 21:13:05 GMT
Post by endfeed on Oct 30, 2016 21:13:05 GMT
Was the f&e tank already drained? It looks bone dry it had a thick layer of rusty shitty water on top .boilers very old!! |
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Post by Deleted on Oct 30, 2016 21:16:00 GMT
I find with bunging systems if you're sensible you can do shit loads of work on a system, I know I have I like to push the limits.  |
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j
Oct 30, 2016 21:26:07 GMT
Post by battle1066 on Oct 30, 2016 21:26:07 GMT
it had a thick layer of rusty shitty water on top .boilers very old!! Does that system have inhibitor in and could that be lime scale in suspension form if it does have inhibitor in? |
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j
Oct 30, 2016 21:28:59 GMT
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Post by endfeed on Oct 30, 2016 21:28:59 GMT
Was the f&e tank already drained? It looks bone dry went well rocky dead easy.had to drain about two litres of water for vacuum to come also shut auto air vent on flow to cylinder i jusy felt this might break vacuum..😊 |
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Post by endfeed on Oct 30, 2016 22:27:42 GMT
Does that system have inhibitor in and could that be lime scale in suspension form if it does have inhibitor in? its my own system and its 20 years old,g plan,i think,ive always had inhibitor in it,but in july we had loads of noise from boiler(kettling)put some boiler silence in and it sorted it.i think the heat exchanger is rotting away.few years ago there was a thick jelly on top of f and e tank fooking gross! Anyrode me and me gas head mate are putting combi in soon(plenty of pics) this system has been fantasic only had new pump and port valve in 20 years its an ideal classic been a big decision to let it go!!😢 |
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j
Oct 30, 2016 22:30:16 GMT
Post by Deleted on Oct 30, 2016 22:30:16 GMT
The thick jelly was probably washing up liquid mate.
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j
Oct 30, 2016 22:53:16 GMT
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Post by endfeed on Oct 30, 2016 22:53:16 GMT
British gas installed years ago would they have used washing up liquid?
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j
Oct 30, 2016 22:58:27 GMT
endfeed likes this
Post by Deleted on Oct 30, 2016 22:58:27 GMT
British gas installed years ago would they have used washing up liquid? I think yrs back some plumbers would put it in to keep system noise down mate, I expect Tom can shed some light on that though endfeed. |
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j
Oct 31, 2016 8:31:26 GMT
Post by tomplum on Oct 31, 2016 8:31:26 GMT
Thats true PB, washing up liquid was widely used to quieten a noisy system, it changes the Ph of the water ( softens it ) I've used it many times, I've never seen it form a crust like that though, I used to be a servive eng for servowarm, they used to recommend we put in a bottle of servowarms own inhibtor every service, and charge for it, now that did form a jelly like skin on the expansion tank, It might be that,  |
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j
Oct 31, 2016 16:37:17 GMT
Post by battle1066 on Oct 31, 2016 16:37:17 GMT
Does that system have inhibitor in and could that be lime scale in suspension form if it does have inhibitor in? its my own system and its 20 years old,g plan,i think,ive always had inhibitor in it,but in july we had loads of noise from boiler(kettling)put some boiler silence in and it sorted it.i think the heat exchanger is rotting away.few years ago there was a thick jelly on top of f and e tank fooking gross! Anyrode me and me gas head mate are putting combi in soon(plenty of pics) this system has been fantasic only had new pump and port valve in 20 years its an ideal classic been a big decision to let it go!!😢 Would the kettelling noise be there regardless if its hot water only or a combination of hot water and heating selected? |
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j
Oct 31, 2016 17:05:31 GMT
via mobile
Post by endfeed on Oct 31, 2016 17:05:31 GMT
It made the noise when hot water was called for like a fizzing and popping sound???
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j
Oct 31, 2016 17:27:32 GMT
Post by battle1066 on Oct 31, 2016 17:27:32 GMT
It made the noise when hot water was called for like a fizzing and popping sound??? The reason I asked that question is I've a similar problem (open vented contaminated system) to look at which only makes a light kettling noise when the heating is selected. Now the F&E contamination seems minor compared to your example but his system is well dosed up. |
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j
Oct 31, 2016 19:30:24 GMT
via mobile
Post by endfeed on Oct 31, 2016 19:30:24 GMT
I used to clean the f and e tank regulary but the contamination always comes back system always ran well the thick jelly is weird if anyone can shed any light on why it happens would be good?? Not to worried as its gona be ripped out soon for combi...☺
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j
Oct 31, 2016 19:39:20 GMT
endfeed likes this
Post by battle1066 on Oct 31, 2016 19:39:20 GMT
Not this job but last year I had a job which had heavy growth within the tank which was cured by this advice from the net
My Feed & Expansion tank contains 'foulant'. Will System Inhibitor remove this?
System Inhibitor is a mild biocide, but if your feed and expansion tank is contaminated with a jelly-like substance that smells (which could be bacteria, algae, fungal growth or yeast formation) then you should bail out the tank and rinse with a 10% solution of household bleach. Observe good personal hygiene practice.
The expansion of warm water into the feed and expansion tank, together with the ventilated loft space means that the ideal environment has been provided for airborne bacteria and spores to thrive.
Although one might expect the natural 'pasteurization' effect (15-30 minutes at 60?C) within an active central heating system to kill off these bugs, their effect on water quality can be detrimental. Its therefore important to remove this contamination.
Organic matter in their metabolism produce change in the composition of water; algae remove carbon dioxide and give off oxygen while other organisms consume oxygen. Decay of organic matter may also generate corrosive amino-acids.
Sulphite Reducing Bacteria (SRB's) for example which produce hydrogen sulphide cause corrosion directly but are only active during periods of inactivity. (Over the summer for example). There are, however, mesophillic and thermophillic SRB's which can survive and grow in hot water.
Treating a clean system with System Inhibitor and covering the feed and expansion tank with a close fitting lid should prevent reoccurrence of the contamination.
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