[Shop-talk] Seasonal water hammer?

[Eric J Russell]

Is there a water hammer preventer in the system? (I don't know if that is 
the real name - usually a capped off section of vertical pipe, the intention 
is for that vertical piece to be filled with air and act as damper for 
sudden changes in water pressure.)

If so, the cold weather would likely reduce the volume of air in the water 
hammer preventer, lessening the dampening effect. Draining the water pipes 
might let it get refilled with air and return the preventer to full effect. 
Or a larger vertical pipe (longer or larger diameter) might fix it.

Eric Russell
Mebane, NC

----- Original Message ----- 
From: "Larry Spector" <lspector at gmail.com>
To: "shop-talk" <shop-talk at autox.team.net>
Sent: Wednesday, November 05, 2014 12:50 PM
Subject: [Shop-talk] Seasonal water hammer?


> I've got an odd problem, and it's been going on for a couple of years now.
> Every fall, when the cold water supply (county water) starts getting even
> colder, I get water hammer. I can usually get it to go away by turning off
> the tap and turning it back on slowly, but it's a pain to deal with.
>
> Any idea what may be causing it and what can be done to alleviate it?
>
> Thanks,
> Larry