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Thank you John D - I've cured the drip so should be no new staining - ive used stiff bristle plastic brush which has helped a little but not removed stains. Ive just uploaded a photo to Dave's House album but not sure if you can find this. Can something be applied to blend in with surrounding...

sorry for posting this on wrong part of site - didnt realise this was plumbing section - moved to building section!

Our outside gable wall is made of light coloured fairly porous brick and has become discoloured over last 2 years with intermittent drips from the overflow pipe from our central heating boiler. I have tried brushing in bleach to the bricks with limited success. Can anyone suggest a cheap simple...

Our outside gable wall is made of light coloured fairly porous brick and has become discoloured over last 2 years with intermittent drips from the overflow pipe from our central heating boiler. I have tried brushing in bleach to the bricks with limited success. Can anyone suggest a cheap...

thanks for your help - I was able to locate the cold water top up link and heating and hot water working fine.

Due to constant dripping from boiler through PRV ? (i think) to the outside of the house I checked pressure gauge on boiler and it was in the red over to the RHS of the gauge - heating as only been on intermittently but constantly used during summer for hot water. I tweaked the PRV knob and...