Does anyone know anything about these white,plastic,push/pull shut off valves? I have them on my toilets and recently one has started making a spitting,rushing type sound when it is refilling.I replaced the fill valve and tried to clean out the supply line. It seemed to help a bit,but it is still making that noise. I can't remove the entire supply line as it seems to be one piece with the shut off. Any info on these things would be helpful. Thanks in advance.

Can you post a pic of the valve in question? It would be much appreciated. Lee.