Often the law grants you less rights than many store's policies. Here (US) many stores have a no questions return policy and will give your money back for any reason just about as long as you have a receipt. But that's not necessary on their part. Their only obligation is to live up to the contract and implied warranty of the sale, i.e. what they claimed to be selling is what they sold, and that it functioned as claimed. Stores have no obligation to return products just because you changed your mind, and if it doesn't work properly, their only obligation is to fix it, replace it, or keep up their end of the sale in some manner.

It's likely easier to just let them flow a pit at the facets. Although the outside spigot will create a pile of ice.

That's a nice idea, until the emergency situation also cuts out the gas. This can happen in an earthquake, if you're in that neck of the woods. I would hate to have an emergency generator not work in an emergency.

Remember to bond your different grounds or you'll have a potential between them.