[groundhog]

I have just replaced the membrane on my RO and it is now producing water ridiculously slow! I have good water pressure and have never needed a pump so not sure what is going on? Any ideas?

[Richard Groves]

I think you're going to have to provide a bit more information, what size ro is it ? have you replaced with a branded like for like ? are you sure the membrane has been replaced the right way round / seal correctly fitted ?

[groundhog]

It is a 20", never had a problem before. It is the cheapest membrane I could find on Window cleaning warehouse, but is literally producing water 75% slower than before! I will check it is the right way up when I finish work.

[Richard Groves]

I've a 4040. Its a shame not all membrane brands have a flow direction symbol on them ! .... I recently replaced mine after cleaning it in hg descaler the wrong way round ( the tds was higher though ) . From watching a  youtube clip ( squeaky clean ) I realised my mistake. Seems the end with the rubber seal /gasket on it usually goes in first to the feed end. Don't know if thats of help or not, but good luck .

[windowswashed]

The RO starts slowing down when the carbon filter is clogging up.  Did you replace the filters when you replaced your ro membrane?

[P @ F]

These days my RO goes faster than me