Fluid coupling assembly and method

A flow assembly comprising:

• a flow source;
• a flow destination;
• a pump for delivering substance via a flow path from said source to said destination;
• and
• a fluid coupling assembly disposed within said flow path between said source and said destination, said coupling assembly comprising:
• a first connection member having an exterior surface, an interior surface and two threaded through holes from said exterior surface to said interior surface;
• a second connection member having a first sealing surface facing said interior surface and two first flow passages, said first sealing surface being rigidly fixed with respect to said first member;
• and
• two flow sealing members having external threads that mate with said two threaded through holes, two second flow passages aligned with said first flow passages of said second member, and two second sealing surfaces that seal with said first sealing surface around said first and second flow passages upon application of sealing force via rotation of said external threads in said threaded hole.