Residential reverse osmosis system

A reverse osmosis (RO) system comprising:

• a housing that includes an inlet port, a permeate port and a concentrate port;
• a membrane element within the housing;
• a first connector that includes a first end which is adapted to receive a first hose such that the first hose is inserted into the first end of the first connector and a second end that is adapted to be removably connected only to the inlet port and purposefully configured not to be connectable to the permeate port or the concentrate port;
• a second connector that includes a first end which is adapted to receive a second hose such that the second hose is inserted into the first end of the second connector and a second end that is adapted to be removably connected only to the permeate port and purposefully configured not to be connectable to the inlet port or the concentrate port;
• and
• a third connector that includes a first end which is adapted to receive a third hose such that the third hose is inserted into the first end of the third connector and a second end that is adapted to be removably connected only to the concentrate port and purposefully configured not to be connectable to the inlet port or the permeate port.