[AJ]

You say your tap water goes into the RO. Have you not got prefilters on it?
Chlorine from tap water will seriously damage the membrane. You need a sediment filter to take out all the micrscopic bits and bobs that are in tap water (could block membrane). you also need a carbon filter to take out chlorine. These both go before the RO.

[borg]

yes soz i just wanted 2 try what freeman said.