Flushing toilet bowl causes large water hammer noise in basement

Does this "water hammer " occur when it's filling or when it stops?
Is this the only fixture this happens to? Back to you, Tom

If I flush without any waste material in the toilet, no noise occurs. However, if I put toilet paper or other waste in the toilet bowl, a second or so after flushing, I hear a loud water hammer sound that seems to be coming from the basement.

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Originally Posted by jameelsx

If I flush without any waste material in the toilet, no noise occurs. However, if I put toilet paper or other waste in the toilet bowl, a second or so after flushing, I hear a loud water hammer sound that seems to be coming from the basement.

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This isn't water hammer. Water hammer occurs in the pressurized water pipes. Yours occurs when the discharge hits the bottom of the stack. Did this just start or has it been ongoing? Let me know, Tom

Its been there ever since I moved into the home.

OK! Here's what I think's happening. You flush a upstairs john. The discharge, including the soilds, picks up speed dropping down the stack until it hits the bend at the base. What it hits down there is anybodies guess but it's banging into something.
If you have a clean out in the basement on the stack snake from, there. Otherwise snake from the roof vent. Put out enough snake to reach the base and 20 feet more to get out in the house main. This may be some sort of design flaw and nothing can be done but snaking the line is a start. Good luck, Tom

Thank you Speedball1.

Hello, I just remodeled 2 bathroom and of course bought brand new toilet. One on 2nd floor, other one in basement. Both of them makes rattle noise as soon as I flush them... Could it be the same reason as "jameelsx"? Look forward to hear from you.

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shannonkimidea : Hello, I just remodeled 2 bathroom and of course bought brand new toilet. One on 2nd floor, other one in basement. Both of them makes rattle noise as soon as I flush them... Could it be the same reason as "jameelsx"? Look forward to hear from you.

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Tell me more about this sound, Do you hear it when the toilet's flushing or when the tank's filling? Back to you, Tom

Can you help me? My water hammer occurs when the systen is coming to the end of the flush, when the water has filled up. Ive had all parts replaced in the systen but it keeps coming back! Thanks.