shock arrestors

[hammers4spanner]

in work today listening to another plumbs chirping about these saying that they stop water hammer , have i missed something with these devices as i thought they where for thermal expansion??

 

[Leo21]

Some of the old Vaillants have them in, they look like little pressure vessels. Never had the need for one.

 

[lame plumber]

a lot of boiler mfis specify using them, if you care to have a read

 

[hammers4spanner]

i did says thermal expansion
but plumbs was chirping in about water hammer

 

[Leo21]

a lot of boiler mfis specify using them, if you care to have a read

Tbh I only fit Vaillants, so I'm ok. Not required.

 

[Ermintrude]

Tool station do a nice compact one . Think Albion require them still on their whermal wars

 

[hammers4spanner]

Rephrase question why does he think stops water hammer ?

 

[lame plumber]

coz they do

 

[Ermintrude]

The chamber dissipates the schlock wave. It's built so that when the returning wave bounces back it's 1/2 a wavelength behind the forward one thus cancelling out. Destructive supposition, exactly how the silencer works on ideal logic

 

[hammers4spanner]

coz they do

Never knew answer then

 

[solutions]

i did says thermal expansion
but plumbs was chirping in about water hammer

They work for that too assuming the water hamer is caused by fast closing valves or jumping ballcocks they soak up the internal back pressure wave. there are micro ones with 3/4" bsp conections intended for washing machines as the solenoid valves on them can cause water hammer.

 

[solutions]

The chamber dissipates the schlock wave. It's built so that when the returning wave bounces back it's 1/2 a wavelength behind the forward one thus cancelling out. Destructive supposition, exactly how the silencer works on ideal logic

Damit Ermi! If I didnt have to settle my son I would have had this one. Angrily transfering annoyance that I am now sleeping on a floor beside a cot.

 

[Ermintrude]

Ha ha our 3 year old has chicken pox and was a mare to settle Monday . Thumbs up for being a top dad though.

 

[kris]

Oh the pox ermis,,, all that red dotties

 

[lame plumber]

Never knew answer then

that was the answer dingaling