Magnaclean 28mm Leaking Again

[JackK]

My Magnaclean filter 28mm is about six months old - I replaced it already once in January and I can see that it is leaking from the isolation valves again

Is this normal? It was bought brand new and I wonder now if I should get a brass filter

Previously I was told that these magn filters are the best at catching debris but it has leaked twice in six months

The filter is on 28mm copper pipework so I cannot think of how this could happen with different new units

Any tips on whether to replace with a brass one at a cost of £250

 

[JohnD]

Where is the leak coming from? The valve spindles? Or the joints where the valves are attached to the body? Or to the pipes?

Do you really mean 29mm pipe?

 

[JackK]

Hi Its 28mm pipework

The leak is coming from the valve joints which attach to the casing - I had a gas engineer come out and he tried to tighten it but said its leaking

 

[JohnD]

I don't quite remember - is there a rubber "O" ring in that joint?

 

[Mike13]

yes, maybe it has got scale on it, or it was not greased when assembled. I still have a bit of a tube of Dow corning MS4 that always helps with leaking at o rings

 

[JohnD]

I think silicone grease is more appropriate.

I found the threads on the glass-reinforced plastic tend to feel gritty.

 

[Mike13]

Dow corning MS4 is a silicone grease, more usually used on vacuum gear, but perfectly fine for plumbing.

 

[JohnD]

oh, sorry, I thought it was a sealant