That can bring a household to a screeching halt! There are two main causes of backflow in plumbing – back pressure and back siphonage. Back pressure is defined as water being forced to flow in the opposite direction. Back siphonage might be more complicated. It occurs when the pressure in the water supply becomes smaller than the pressure in the plumbing system.
The most important thing is how is it prevented? Here are some tips –
1. Have a hose bib backflow preventer
2. Have a vacuum breaker that constantly monitors water pressure in the system
3. Something called a barometric loop shaped like an inverted U
Now, what about fixing the problem if it occurs. That’s easy! Call backflow expert Shawn Allen. Shawn is the owner of Allen Plumbing here in Snohomish and he serves all of the Seattle area’s plumbing needs. Visit www.plumbersnohomish.com for a list of all services, then give Shawn a call for whichever one you need at (425) 367-4744.