I'll pass on the new and exciting drugs and go with natural foods/water/mineral supplements.Let me get on ozempic...wait, if I ate healthy, if crops weren't sprayed with folic acid/pesticides, if the water supply wasn't laced with flouride and heavy metals maybe they wouldn't get so fat and cancerous in the first place? 

Acid washing when required is $500.

I know very little about legal precedent but I'd expect the major meter manufactures (selling into the utility space) to be well incentived to challenge these items best they can, and they have money.Here are the issues, and the reasons that the difference between an air forced system and a boiler/hydronic system are not meaningful for this discussion (ie efficacy issues of sub metering exist for either when method of measurement is measuring heat at point of delivery):In either case, the blower (or pump for a boiler) is the method of 'moving' either air (central air) or water/glycol or equivalent (boiler etc). 

PLUMBING FIXTURESThe bathrooms, toilets and kitchen plumbing fixtures shall only be used for the purpose for which theywere designed or built; sweepings. rubbish bags. acids. sanitary napkins, baby wipes, paper towels.should all be disposed of in regular waste receptacles.

Copper lines usually go bad from acidic water which lets the copper develop pinholes; occasionally you'll have solder joint failure.

Plumbing is a great example - as an ex-plumber I'd take PEX over galvanized any day, and even over copper (at least the newer stuff) especially if you live where the water is somewhat acidic.

It also depends to some degree on your water supply - how acidic it is - and climate,  etc.   

I've seen some do an acid wash and not try to cover up the existing but just clean it up.In the photo, the real wall paint color is by Sherwin Williams Interactive Cream.

Ice melt on the other hand is like acid to cement and concrete.

Mike, This may not be an issue for you, but keep in mind that coal and coal dust is acidic.