It may if is a result of freezing due to power failure or storm. Not due to negligence or poor design.
Sure, as long as the damage was from a covered cause. The key to homeowners insurance is that the damage is due to a covered cause. If you a re searching to see if your insurance will pay for replacing the pipe because of lack of maintenance, no it will not. Maintenance is not covered on a homeowners policy.
Most will if it is in the slab. Where it can get tricky is when the pipe in in the yard.
If a broken pipe caused water to go in the furance and it no longer works is an example. Your homeowners insurance will not pay for wear and tear.
You would gave to find out from the actual insurance adjustor. There is no way anyone else can know that.
If no one has bought it in the time that happened, then it is still considered yours. Your homeowners insurance should still cover it. If you still have questions about it, you should talk to the company that your insurance associates with.
If you are filing a homeowners insurance claim because your basement was flooded then be sure to be specific when making the claim because most homeowners do not have flood insurance. If your basement flooded as a result of a broken or leaky pipe or from some other cause from inside the home then you should be fine but if your basement was flooded as a result of an outside source then you may not.
You'll have to contact your insurance agent and ask them, There are many different levels of Homeowners Insurance and it really depends on the breadth of coverage you purchased. As a general rule though. If the pipe collapsed due to a covered peril then it would be covered. If it collapsed due to age or normal wear and tear then it will likely not be covered due to it's being a maintenance issue.
Damage done by the leak will be covered. The pipe itself (along with any thing they need to tear out and replace to get to it) is not.
blown head gasket or cracked block blown head gasket or cracked block
Yes
If your policy has coverage for accidental water discharge, the resulting damage would be covered but only after the owner has repaired the damaged pipe. If your pipe busted as the result of a covered peril such as fire, wind hail etc (see your schedule of covered perils) then the pipe itself would also be covered.
For townhouses, you should make sure your homeowners association carries appropriate federal flood insurance which protects you and you neighbors from rising water from a stream, river, ocean or canal. If a flood in your house is caused by sewer backup or a broken pipes, you need to make sure your personal homeowners insurance covers those problems. Also, ask your homeowners insurance company how to insure common walls of a townhouse in case your neighbor has a broken pipe or some other internal problem.