New water hammer at toilet....

[OnlyinCali]

House is from 1954, most of the copper has been redone. The toilet in the main bathroom just started hammering REAL BAD after every flush. This bathroom is only 8 months old and I installed new supply branches off the main line when re-doing this bathroom recently. Everything is copper.

I had to turn the valve to 1/2 off to get the hammering to stop.

Do I have a new pinhole leak that's letting water in? Any reasoning to why the toilet hammering would just be starting now, despite nothing having changed in the past 8 months?

 

[Reach4]

Check your water pressure with a gauge.

Note that water hammer means a single bang when the valve turns off.

A new fill valve may solve this for you.

 

[Sponsor]

 

[OnlyinCali]

Check your water pressure with a gauge.

Note that water hammer means a single bang when the valve turns off.

A new fill valve may solve this for you.

Thanks for the reply. Water pressure is 42-46 psi measured at hose bib nearest main line. I think I was describing the sound incorrectly then. It sounds like a machine gun or "constant and repetative" hammering. Toilet is only 8 months old and is the $99 lowes model. Should I just replace the toilet fill valve?
Thanks again

 

[Reach4]

Toilet is only 8 months old and is the $99 lowes model. Should I just replace the toilet fill valve?

I think so. Maybe Lowes will provide one for you under warranty.

I am not a plumber.

 

[Terry]

I would replace the shutoff at the wall perhaps. Sometimes the washer there flutters and causes rapid banging.

 

[OnlyinCali]

Thanks! I'll replace the shutoff angle valve first and see how that goes. Just out of curiosity, what washer are you referring to? If it matters, its 1/2 compression at wall side.

 

[Terry]

The multi-turn shutoffs can hammer if they get old. The 1/4 turn shutoffs don't.

 

[OnlyinCali]

its a 1/4 turn brasscraft shutoff, roughly 8 months old. Sounds like I should forget about replacing it? What do you think of replacing the fill valve on the toilet Terry?

 

[Terry]

The shutoff you have should be fine. The next step is the fill valve. Some will come apart for servicing. I sometimes take off the top, hold my hand over it to deflect the water back into the tank and then reassemble.
Please don't make me write, Turn off the water first before taking it apart.

 

[OnlyinCali]

hahaha. I wish you would have left the "turn off water" part out...If i got wet it was well deserved!

Will play with fill valve. Thanks again

 

[OnlyinCali]

Just wanted to come back and say thanks again. I finally replaced the toilet fill valve and the problem has been solved!