has anybody had an ro set up which was too slow producing pure water, and changed to a Booster Pump to make it quicker, does the pumped version make it much quicker, my 200 ro was too slow, to fill a 25ltre drum would take 3 hours. looking at the vyair 200 with fitted pump do you think this would be better and quicker filling drums. my tap pressure must be low a pump says more pure quicker. priced £200