best practice

Exploratory discussion about best practice for the ordinary home & Water Shock Arrestors: Standard 3 bedroom semi detached house, water meter is on pavement out front. Blue pipe comes into the house under alleyway. Where (and how many) shock arrestors should be fitted in an average home. I...

I need to put a hole through the external wall for a kitchen extractor and there's already a couple of other holes in the vicinity. I can't find any regs or official guidance for how large a hole you can make and how far they should be from other holes, openings etc. Is anyone here aware of...