Should home-buyers have a professional plumbing inspection done? Speak to your local vaillant installer about direct replacement. Hopefully, you’ll never need our services…but if you do, you can count on us to handle your plumbing problems with professional care! Rated thermal power max/min (heating). Can they provide you with local referrals? Remove any guesswork about what’s causing your blocked drains with a cctv drain survey from the professional drainage engineers at environ.