EverbuildP11 Central Heating System Cleanser, 1 Litre

There was an, almost, immediate improvement in the performance of the heating system.Much quieter and warmer.As it is an "old" system I'm leaving it in the four weeks recommended.

Good product shame the delivery driver delivered it to wrong house

I bought this because i hIad noises every time I turned on central heating, my daughter was visiting us over xmas and she thought there was hailstones coming down, I said no thats the heating system.So finally got around to purchase this cleaner, up in the loft I go empty dirty water out of small tank about 2 buckets, the water was black with lots of small black bits in it.I tip the liquid into tank and refill.That evening I turn on heating and the noise has completely gone, Fantastic.In about a month when weather gets a bit warmer I shall drain down the system and flush it out, refill and add some inhibitorI Recommend this item..

I was skeptical but followed the instructions and left the P11 in the system for a month withthe heating coming on daily. Subsequently flushed and refilled using some new P14. Most impressed, convinced the system is quieter now.

i bought this a while ago and after using in my central heating system i think i can safely say it has worked wonders. Before use i was experiancing some noise in the system and thought it might be a good idea to apply a cleaner such as the Everbuild. Just add to your system and use as normal before flushing out again after a several weeks then apply some inhibitor... remember to read and follow manufactures instructions at each stage. Well it was the best thing. No more noise and the radiators are all nice and hot as they should be during these cold winter days. Money well spent i would recommend to those confident with a bit of DIY maintence.

I was expecting to have to flush my entire central heating system, having had problems with radiators (hot at top, cold at bottom). I thought this would be worth trying, and it has certainly made a difference.I've now drained several radiators and the water was filthy after using the Everbuild cleaner - so it certainly is doing its job. Having refilled and bled all radiators, the water is now running clean. Really impressive result, and the efficiency of the radiators is especially noticeable at the bottom, where they were previously cold due to sludge.

Used this to clear some stubborn limescale out through header tank immersion and starley Johnson water heater exchange which was not working almost, really bad.Fed through with low heat first for a few hours then put heat full up on gas then put electric immersion on hot.When flushed out I was surprised I never saw lots of hard bit of limescale come out but water was quite murky and system is working like new again. As the system is about 15 years old though it might need replacing and copper immersion at be 30 years? Or longer.See how it goes using bad of fernox softener in header to help keep new build up at bay. So I give 4 stars as pleased with delivery time and that it seems to have done an excellent job.

It's OK