I did some diy drip line irrigation in my yard and garden and ran into a problem with too much backflow pressure. After spending 2 hours on the phone with the brand name company without any solutions I called WaterTec in Langley for some help. They were extremely knowledgeable and were able to provide me with the solution I needed. They even took the time to explain everything to me so that I understood it. I highly recommend them for any irrigation needs.