Here in Illinois we cannot use PVB’s we have to use RPz backflows. The cannot be buried under ground. They can be out in a basement or a boiler room. If you install a RPz indoors it must have a drain pipe below the dump at least 11/2 times the size of the RPz backflow. We are not allowed to use “douable check valves either. I think every state has it’s own codes.
@@logansneed2882 yes. In Illinois it takes a licensed plumber to install and test them. In Missouri I have a license to test and repair them. The unions in Chicago set the rules for Illinois and keep us Irrigation guys from testing.
Where ever the previous owner put it 😂 if they didn’t mark it or put a cover on it just have to back track the sprinkler system and locate it. Big headache
In tx usually underground. Not a pvb but a dca. Usually in a box. Sometimes no backflow preventer at all. When illegal is ok......illegal is what you get.
Ya. Everyone seems to think that 1 inch main is way to go. Many times , if large residential and or low pressure - Good idea to go 1-1/4 inch sometimes. Or even larger depending on meter size. This one size fits all is getting old.
@@Jehucurliss2kings I'm a licensed irrigator and licensed backflow tester. You done hundreds? I've done thousands... the amount of friction loss that happens in a 11/2 pipe is not that much of a drop from 11/4 look it up on your pressure loss charts if you know what those are. Therefore the benefits of using 11/2 aren't many...
I see now that your main point was pressure loss between 1 1/4 and 1 1/2. My main point of disagreement was your statement that 1" usually works. Depends on size of system.
Why do you not put unions on the PVB so that they can be taken off for the winter? What a waste of time and money to wrap insulation around the pipes. Also why not put a ball valve on the upleg pipe so you can shut it off at the backflow in case you have to replace it?
I agree with the unions. Exposed pipes (above ground) and capped off will break when the water inside freezes and expands, so it needs to be wrapped. In the video, it showed a shut-off valve was installed right after it teed off the main line in case you've missed it.
