Info required about faulty Honeywell V4073 valves

[D_Hailsham]

Last year there were suggestions that a batch of Honeywell mid-pos valves were faulty and causing banging noises (see //www.diynot.com/forums/plumbing/grundfos-pump-speed-setting.297863/#2171365 ).

I had a new V4073A fitted in July 2010 and since then have been plagued with random banging noises from the system. Attempts to located the cause have failed as the noise is so infrequent and lasts such a short time.

It usually consists of a couple of 'taps' in the pipe work followed by a larger tap and then one or two very loud 'thumps'. The whole sequence lasts about 10 seconds.

Does anybody have more info about the faulty Honeywell valves? What the exact fault is? Have Honeywell issued a recall notice? What serial numbers are involved?

 

[gaswizzard]

Not sure regards the serial #s but after examining a few of these problematic valves it seems the 'rubber ball' bounces off it's seating (maybe a harder material) , also the ball returns to rest a tad faster than the 'norm' , have got away with it by stretching return spring (not good for a new valve )

 

[Hugh Jaleak]

Interesting. I have the V4073, and have been getting banging noises from the pipework. Had put it down to expansion/movement in the pipes under bedroom floor. (Not got round to looking as need to move the furniture to get floorboards up and dont fancy emptying the wardrobe as other half has filled it....)

Makes me think as the pipework has been in situ without a problem for a number of years, valve is a more recent addition, (replacement for faulty Sunvic), and noises even more recent.

 

[gaswizzard]

The way to check if it is a 'faulty' valve is run hot water only and then manually open the valve with a harsh 'flick' and let it return to rest (bang) , if you were to take the tension off the lever whilst the valve is returning to rest (hw on/heating going off) then it should shut with no noise/banging.

 

[Hugh Jaleak]

Seems ok by that test. Looks like its floor up. Oh the joys....

 

[D_Hailsham]

The way to check if it is a 'faulty' valve is run hot water only and then manually open the valve with a harsh 'flick' and let it return to rest (bang) , if you were to take the tension off the lever whilst the valve is returning to rest (hw on/heating going off) then it should shut with no noise/banging.

The noise has just occurred (15.40), but not so loud. Hot water is only on from 12.00 to 14.00 in the afternoons, so I am beginning to doubt if it is the valve causing the noise.

One of my rads keeps on getting a lot of air in it; I have to bleed it every two weeks. Could the noise be connected to this?