Home>Discussions>PLUMBING>Water Hammer Arrestor
6 posts / 0 new
Last post
Lance
Water Hammer Arrestor
Lance

I wish I had the ability to search posts instead of having to read through them all to find the correct topic as I'm sure this question has already been answered. I need to install a water hammer in my piping, and I'm trying to find a more permanent solution than the Sioux Chief arresters I've been getting from Home Depot. When I install them at the washing machine, the pipes are quiet for the first few months, but after that the noise gets progressively louder. By about a year's time, even closing the faucet will cause loud banging of the pipes.

Is there a more robust brand that will give me a longer lifespan or do I have to keep replacing the arresters every year?

Also, my house was built in 1962. Should I be looking into a plumbing upgrade after so many years or am I okay as long as there are no glaring problems?

Thanks!

dj1
Re: Water Hammer Arrestor
dj1

I use EASTMAN brand, seems to be fine.

Go to terryloveforum to find out if there's a better brand of hammer arrestors that some of the plumbers over there use.

Not knowing what kind of pipes you have, replacing 50+ year old pipes is not a bad idea. If you have galvanized pipes, replacing them is highly recommended.

Lance
Re: Water Hammer Arrestor
Lance

Information is much appreciated and I will check out the other forum for other professional tips. Another question is whether or not you only use the arrestors in one location at the washer or if they are located in multiple locations.

Mastercarpentry
Re: Water Hammer Arrestor
Mastercarpentry

If it's all copper plumbing (likely during that build era) then you probably are OK. The 'hammering' would have exposed any weaknesses there by now. The one exception is that during that and earlier eras it was also common to use galvanized "risers" going up the wall to fixtures. Those would ideally get replaced but that can mean pulling cabinets and making wall repairs so my usual recommendation with those is to leave them alone until there's trouble. If the trouble is clogging, replace that one; if it's a leak replace them all as they will all soon follow suit. If you're in that spot renovating the room anyway, replace those while it's easy to deal with and eventually you will get them all.

As to the water hammer arrestors it varies. Sometimes you just need the small ones at the washer, sometimes you need more. Something you should also be doing is draining the piping annually, and here's why: With copper piping they should have put in 'air traps' which are short closed sections of pipe above where they emerge from the wall. Normally water cannot enter these so they perform the same as added hammer arrestors. Over time they can fill with water rendering them useless; totally draining then system restores the air back into place. Washing machine connections normally didn't have these, that's why the usual need for additional arrestors is at the washer and why that's usually enough.

The one certainty is that the hammering can damage hard piping of any type so it needs to be dealt with ASAP before a disaster forces that to happen.

Phil

keith3267
Re: Water Hammer Arrestor
keith3267

If you are on a well, your well tank is waterlogged and that is causing your problems. For this, you may need a new well tank or the current tank may need an air injector added.

If you are on city water, no doubt the city has recently added a backflow preventer out at the meter and that is now causing your problems. Normally when a backflow preventer is added, an expansion tank is needed at the hot water heater. It is similar to a well tank but much smaller. A well tank is typically 40 gallons where the expansion tank is only about 6 gallons or smaller. These are also called accumulators.

http://www.homedepot.com/p/Watts-8-5-in-W-x-11-5-in-D-x-8-5-in-H-Pre-Pressurized-Steel-Water-Expansion-Tank-DET-5-M1-HD/205556413

HoustonRemodeler
Re: Water Hammer Arrestor
HoustonRemodeler

How high is the static water pressure in your home ?

Sponsored Stories

TV Listings

Find TV listings for This Old House and Ask This Old House in your area.