Flow Plumbing & Gas is rated 3 out of 5 in the category utilities. Read and write reviews about Flow Plumbing & Gas. We are a family-owned business, providing heating and plumbing for homes and businesses in the greater Wellington region. We know what we are doing and we do not simply ‘dabble’ in heating. It’s in our blood and there is nothing more rewarding than flicking the switch and transforming a family’s cold freezing house into a warm and comfortable home. It’s a life-changing experience and you’ll wonder how you lived without it all those years.