water hammer arrestors, 1/2"

We have some loud pipes in the walls. The washing machine was loud until I installed 3/4" arrestors to the machine. This was 100% effective and made all the difference in the world.
https://www.amazon.com/dp/B000H5MQNM/?tag=skimlinks_replacement-20

Now I want to simply install these on the 1/2" facet fitting under the sink.
I can't find a simple screw on arrestor that is 1/2"? I could simply screw these into the hot and cold valve like I did for the washing machine.
I love these things and they work great.

They worked wonders on the 3/4" washing machine fittings.
Any suggestions why they do not make this for 1/2" under the facuet. Everything I see I must solder the unit on?

Sioux-Chief made them last Tim I checked. Just click on the Sioux-Chief on the page you linked. Amazon has them.

I wish it was that easy.
Sioux-Chief does not make a 1/2" mini resistor. I think they only make a mini resistor for 3/4" fittings? All their 1/2" items I think need to be soldered in there?
There must be a logiocal reason why they don't make a mini resistor for 1/2" piping which is what runs through the house?
Maybe someone here knows why?

dupsta said:

I wish it was that easy.
Sioux-Chief does not make a 1/2" mini resistor. I think they only make a mini resistor for 3/4" fittings? All their 1/2" items I think need to be soldered in there?
There must be a logiocal reason why they don't make a mini resistor for 1/2" piping which is what runs through the house?
Maybe someone here knows why?

Click to expand...

I believe they make one with a 1/2" screwed connection. That's a pipe thread not a hose thread, however.

It sounds and looks like those Mini-Resters are somewhat temporary as they only last as long as the air remains trapped above a separating o-ring, of sorts. If you read some of the user comments they last for varying amounts of time. Like 18 months to 2 years or so. Of course this may vary considerably based on individual use and exact circumstances.
They would be better than just a small section of pipe, that some plumbers provide, which just have the initial trapped air that gets absorbed into the water in probably less time.
A better option would be a type that is made to be recharged with air easily. Most are more costly.
Alternately an arrangement made up, as a plumber would, with a section of pipe with the trapped air. Except it should be set up with an isolation valve and a draw-off or drain valve between the isolation valve and the air filled pipe.
If you can picture it, that would allow you to isolate it from the water pressure and then open the draw-off valve, draining the water from what was once the air filled pipe section. Thereby refilling it with air.
A stop and waste valve may work but not sure if the water would empty through that small drain hole while trying to get replacement air.

Just food for thought.

that company also makes hammer arrestors that thread onto 3/8 compression connections to the hot and cold side

yes, my experience says these things have a temporary life. They work when first installed, but in a few months the banging was back. Tried different brands with the same result.

Isn't there a 3/4" fpt 1/2" mpt adapter of some kind you could use? The captive-air arrestors don't need to be installed vertically, so you could stuff them in under the sink any old way.

Use a couple 3/4" x 1/2" threaded bushings and then you'll have a 1/2" female threaded arrestor.

TomFOhio said:

Use a couple 3/4" x 1/2" threaded bushings and then you'll have a 1/2" female threaded arrestor.

Click to expand...

Wouldn't I need two? The mini resistor is 3/4" on both ends. Connect the 1/2" faucet and the 1/2" shut off valve to the 3/4" mini hammer arrestor. Is it OK to do this?

Here's a pricey way: use a 1/2" x 1/2" x 3/4" FPT Tee. Sweat the T into the line, screw the water hammer arrestor in, and Viola!

Slightly less pricey, but more soldering: Use a 1/2 x 1/2 x 1/2 Tee, 1/2 street elbow or short piece of 1/2" copper, depending on where the arrestor needs to wind up,l and a 1/2 x 3/4FPT adapter:


Oops. Just found the 1/2" "Mini-Rester", comes as threaded or sweat.

*Post #4 showed a 1/2" threaded arrester.
*Why would you need them on Sink faucets? Do you close them fast enough to get water hammer?
*Where/how did you plan on incorporating a threaded 1/2" arrester into your system? Did you want something similar to what they made up for the washing machine hose, where you could screw it in between existing screwed connections, without making any piping revisions?

Diehard said:

*Post #4 showed a 1/2" threaded arrester.
*Why would you need them on Sink faucets? Do you close them fast enough to get water hammer?
*Where/how did you plan on incorporating a threaded 1/2" arrester into your system? Did you want something similar to what they made up for the washing machine hose, where you could screw it in between existing screwed connections, without making any piping revisions?

Click to expand...

Yes, I wanted to figure out a way to do this with out soldering pipes as I am an accounted, not a plumber.
The faucets bang with normal use and normal shut off. I can't open the walls and secure the pipes so this worked well for the 3/4" washing machine.
Yes I want to screw it in between exsisting connection with out making pipe revisions if possible.

Can you post a picture of your connections under your sink??

It's a 1/2" water supply hose from the facuet that goes down to a 1/2" shut off supply valve. Super simple and traditional.
This thread was to see if anyone has experience installing and or finding a 1/2" mini resistor between the facuet and the shut off valve. I have seen the 1/2" theaded blatter, but that requireds a T which needs to be soldered in, opposed to the self contained 3/4" version they sell.
Apprently this 1/2" mini resisitor does not exsisit.
Which makes me curious as to why they make a 3/4" mini resistor and not a 1/2" mini reisitor. There must be a particluar reason.
Maybe there is less demand ? Or maybe a technical reason?

dupsta said:

It's a 1/2" water supply hose from the facuet that goes down to a 1/2" shut off supply valve. Super simple and traditional.
This thread was to see if anyone has experience installing and or finding a 1/2" mini resistor between the facuet and the shut off valve. I have seen the 1/2" theaded blatter, but that requireds a T which needs to be soldered in, opposed to the self contained 3/4" version they sell.
Apprently this 1/2" mini resisitor does not exsisit.
Which makes me curious as to why they make a 3/4" mini resistor and not a 1/2" mini reisitor. There must be a particluar reason.
Maybe there is less demand ? Or maybe a technical reason?

Click to expand...

I would say that the most obvious reasons would be, (1) washing machines have quick closing valves, which is the common cause of water hammer; (2) washing machines have a easily removable water line connection by way of the hose thread; And, as far as I know, are all the same for all washing machines; (3) don't think it's very common to have sink faucets causing water hammer; (4) for a faucet, would have to put together a tee type connection that would connect in between one of the typical(they can vary a bit) screwed flexible connectors.
Certainly possible but a much less of a demand.

if its hammering when you open and close the faucet its probabaly a loose stop and waste washer....or faucet washer...if its hammering at rest its a quick closing valve

Yes just to recap, Unfortuntly we have hammering in our system.
DIE HARD, those images are a good idea, I will look for a supply line hose that has male female swivels adpators that go from 1/2" to 3/4".
Fixing the hammering in the washing machine cost 30$ total. Perfect fix. Done and Done. Wish they made a this for the facuets.
1/2" mini arestor please.
I will keep my options open and maybe even consider hireing a plumber to solder in a large arrestor somewhere central.
Thanks again.