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The city recently "did some work" on one of the drains around the corner in my neighborhood. Ever since then, my hot and cold water in the kitchen is taking longer and longer to come on. Started at 5 seconds, now it's 30 seconds.

What can I do to fix this?

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Do you mean it takes a while for the water to get hot, or nothing comes out of the faucet for 30 seconds? – Henry Jackson Jul 24 '13 at 23:20
Does water + air come out of the pipework and then does it splutter? and eventually only water comes out. This question doesn't make sense. You're going to have to clarify what you mean hot and cold water in the kitchen is taking longer to come on. – Matt Jul 24 '13 at 23:54

Because air has been introduced into the water supply system. This is caused by the pipes being drained because they were cut and mended. So when they turn the water supply on again air pressure stop water from filling the pipes. (Because pipes are airtight and so are your taps)

To remedy this you need to open cold water tap and let it run. Don't runt your hot water tap because you might introduce dirt into your heating system. You will hear hissing and spewing noise. Once water starts to run let it run for another minute. You might notice muddy water. If you do let it run for another minute or two until the water is clear.

Sometimes taps have filters (aerators) on them and they can get clogged up causing pressure issues. Also if you did run warm water during priming then it is likely that other filters are blocked. You need to find out which ones, clean or replace them now. Most likely a plumber will be needed to find the problem.

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