[Shop-talk] Well water hammer?

[Peter J. Thomas]

On 8/26/2014 12:12 PM, Jim Franklin wrote:
> I've been hearing water hammer that I thought was the washing machine turning
> off and rattling the pipes, but when I'd go into the basement and watch, it
> never hammered. This morning I woke up to the well cycling. Investigation
> showed the pressure was leaking back down the supply pipe. I replaced the
> Flowmatic check valve with a $16 American Granby (the Nibco was $65).
>
> Now when the pump kicks on there is a significant hammer, about 1/2 second
> after the switch triggers the pump. The check valve spring was pretty light so
> it isn't that.
>
> Any ideas on what's going on here? I'm wondering if something is wrong that
> killed the check valve. It looked original, 30 years old, spring had come
> undone and gotten stuck in the valve.
>
> thanks,
Check the pressure tank.  You can use a regular tire gauge.

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