The fully automatic pumped reverse osmosis unit  is fitted with a standard 50 US gallon per day  membrane. The output specification is  based on an temperature of  25 degC and  60 psi pressure. Larger membranes can be  fitted on  request. Email: morganwater@ntlworld.com Tel: 0208 428 9310,  Fax: 0208 386 7769 Mobile: 07932 159 321,