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Do we need to seal gas boiler flues How to correctly seal gas boiler flues gas safe TB 152
Derek in this video takes a look at gas safe technical bulletin 152 and BS 5440 part 1 to see what the correct procedure is for sealing the flues on gas boiler. Derek also takes a look at the flue snug to see how it complies with the building regulations, British standards and TB 152.
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