Yes, in a word.
If your water is paid for by the assessments you promised to pay when you purchased your unit, and you do not pay your assessments, then the association can deny you access to services, including water, for which you refuse to pay.
Read your governing documents to more fully understand both your responsibility to pay assessments, and the association's duty to collect them, and the lengths to which the association can go to satisfy your debt.
Let your condo insurance company duke it out with the master policy insurance co.
No.
Whether the association is liable to pay for the repairs depends on the terms of your condo association's governing documents and local laws. Generally, the association may be responsible for damages caused by pipe failure, but it is best to consult with a legal professional or review your association's governing documents to determine the specifics of your situation.
I do not live in a condo thus I have no need to shut the main valve
Best practices dictate that you work with the association to be involved in the insurance claim process. Water damage from upstairs certainly involves common areas between the units, which involves the association and its coverage under the master policy. Finally, work with your HO-6 carrier to protect you financially.
Your question is interesting in that it asks about leaks 'onto' your condo, without stating that the water is leaking 'into' your condominium. Water dripping onto your condominium balcony/ roof line/ window pane and so forth is expected and normal so long as the waterproof integrity of your building envelope remains in place and there is no water intrusion. However, if water is leaking into your condominium, you must alert your association manager or resident manager or board and request that the issue addressed as soon as possible. Water leaks mean mold eventually, which can be major damage and which is often excluded by insurance coverage.
State law is not involved in this kind of situation: the association's governing documents, master insurance policy coverage, together with the owners' HO-6 policies determine responsibility for water damage.
Read your governing documents to determine who owns the fireplace. If it belongs to the unit, then you pay; if it belongs to the association as a common element, then the association pays. Fireplaces -- and water-related assets -- are problematic, since when such an asset fails within a unit, other units are generally also involved. The savvy association monitors, inspects and repairs these kinds of amenities, for the general protection of the community.
Whether a condo unit owner can install a hot tub on their deck depends on the condo association's rules and regulations. Some associations may permit it, while others may prohibit it due to concerns about weight restrictions, plumbing issues, noise, or safety. It is important for a condo owner to consult the association's governing documents or reach out to the board for clarification.
There is no standard formula for the amount of assessments levied against each unit in any condominium association. Association budgets are expense driven: that is, monies are due from owners depending on annual budgets developed from expenses spent to operate the community in prior years. Your share of assessments may depend on your unit's square footage, your optional use of amenities or other, depending on what is written in your governing documents. You may also be responsible for paying use-based, individually metered, consumption of utilities, such as water. Your treasurer or association manager can explain the basis upon which your individual assessments are due and owing.
Water is important everywhere .
God probably didn't have anything to do with leaking water from your unit, unless it was a storm, earthquake, flood or other 'act of God'. The association has the responsibility to repair water damage and your insurance -- or you, if you have no insurance, are probably responsible for paying for the repairs. You can protest your liability with the help of an association-savvy attorney, who may or may not take your case, depending on the facts.