You really shouldn't resurrect an old thread like this, as per the site rules you should start a new one and by all means then link to this one.
The long and the short of it it though, that certainly is the internal bubble baffle breaking down. Yes you could fit a strainer on the outlet of the cylinder with valves either side to service but that's just a fudge and the cylinder will only get worse.
The long and the short of it it though, that certainly is the internal bubble baffle breaking down. Yes you could fit a strainer on the outlet of the cylinder with valves either side to service but that's just a fudge and the cylinder will only get worse.