Originally Posted by Mike Leary
Research your question a little more. Rain Master & Data Industrial specs call for "un-obstructed flow" on both ends. Why put unions in anyway? Everything can be serviced from the top.
Like Mike mentioned, be sure to follow the manufactures instructions. Each are different, but the reason a specific amount of straight pipe is required before an after the sensor is to avoid flow deviations that effect the sensor readings.
We have installed close to 100 flow sensors and they are extremely accurate, very helpful and we wish we could have them on all of our jobs.
Once you use them especially with a central the amount of data retrieved is amazing and I cannot tell you how many times we use the flow sensor to test for various concerns from the office without having to go to the site. I am not saying regularly schedule service is not needed, it is just something you will learn using the flow sensors over time.
I do the like the new Baseline Flow Sensor, Master Valve and Decoder all in one units. (Hydrometer)