Finally a clear description as to what these are and what they do! Thank you!

This video just saved me some $$$!! Someone turn one of those off and my sprinkler just won't pop up and work..... Thank God I came across this video. You are really a Pro!!

Thanks for explaining this. I had one (now I know it was the irrigation BFP). Burst during the recent cold spell and left me confused as to what it did. This video explains it well. Thanks!

Thank you I appreciate you explaining how dangerous it could be

Thank you for posting this video it helped me understand more about BFP's

The title says "How does it work" and the video shows why it works. Two different things.

I have a 40 unit apartment complex on a private well that is not hooked up to the city water supply. Yesterday when I turned on the sprinkling system and ran it for an hour, within an hour after the sprinklers shut off I received a call from a tenant reporting discolored water. In the last 10 years no one has ever brought it to my attention, and I am wondering if it could be due to lack of a BFP, or the fact that the pump runs steadily during the sprinkler cycle and the well draw-down was enough to agitate the water in the well and create the discoloration. The pump is usually on for only 3-5 minutes until the bladder tanks are full. The water has cleared up since the turning the sprinklers on.

Great video. But I think you meant the pressure vacuum breaker will vent under backsiphonage conditions, not backpressure conditions.

Great video! Very easy to understand the concept of a backflow preventer

Do you have a video of step by step how to install the irrigation backflow system on a water line inside of a basement

Good presentation and helpful.

Thanks for the video, very helpful. I own a 7 unit apartment building where each water is separately metered. City just passed an ordinance requiring that we have Backflow preventer installed and checked yearly by the city. Question - would we install ONE backflow preventer on the main water line before the splits occur (for each independent unit) or we would we need to install 7 different ones? Any thoughts or recommendations? thanks

Fabulous instructional video!!!

Great explanation! Thank you!

Thank you for the information. Is there any sequencing when you shut them off ? I had to shut irrigation supply because my irrigation was running endlessly

Can you put this onto PVC? Or should that big a plastic backflow preventer?

If you install a BFP do you need to install a pressure tank on the water heater?

Hi, just want to get some professional advice. We are going to do our irrigation soon with all 1” pvc pipe for drip irrigation, but the feed from the main line is 3/4” copper, (the mainline is a lot bigger than the irrigation feed). what size should we use for the backflow preventer, 1” or 3/4” ? Thanks

I have an Orbit 4 outlet irrigation timer hooked up to the hose bib that has a simple BFP screwed on it. I am getting pulsation that is blowing out the $60 timer. Where do I install an atmospheric vacuum breaker? Before the HB valve or after the HB & simple BFP?

What is the purpose of bfp's on water fill for swimming pools?

Can the home owner change a leaking test point? Thanks

learned something new thank you

I have the 720-A model you're showing. Do you have any videos that show how to install it on my back yard irrigation system, how to turn it on, and how to turn it off?

In my orchard I have a brass vaccume breaker, but now I am installing a Febco Backflow Preventer. My question is can I or should I still use the vaccume breaker in line too and if so will it go after or before the BFP? Or should I not install it and just go with the Febco? Thanks

I'm a plumber and I'm doing commercial plumbing renovation the own of the building is asking me to install for him backflow preventer like the one you have in the video , I never install any backflow preventer in my life but I think he should call the city to come and install it for him. Iam right Sir to tell him that?

Can you push air threw this to blow out sprinkler system on the lower side port

Great explanation sir . Thank you.

THANK YOU SIR!

I have a sprinkler system with a double check backflow preventer but when the sprinkler change zones while watering it backs up to the outdoor faucet which is the water supply going to the lawn. Can you explain.. Thanks!

Is it possible to have the zurn 720a valve setup for the whole house? I live here in Las Vegas NV and I replaced my entire valve when they told me they couldn’t find a replacement rubber spring top. However, upon installing the new one and following directions for the setup to try to get the seal to seat or ride up, I am still having a very very slight leak. Is that normal? It’s not as bad of a leak as the original. Also, I currently have my irrigation water line shut off and only water to the house is on, does that make any difference? I thought these valves were suppose to be setup for irrigation landscaping only but it appears the builder of this home set it up for the entire house?

I'm here at work (refinery) and was in a conversation about getting our backflow preventer inspected. I didn't know what they were talking about so I looked it up and your video explained it perfectly. I stay in the country and have a water well for my water supply. U said I don't need this device on my water system, is that correct?

Thank you

What if I used water softener would I need this backflow for my sprinklers?

Backflow preventers are designed to protect the public water main from contamination by industrial/commercial business and from home owners.

Good afternoon sir is it required to have a backflow preventer on a comercial dishwasher? It would be very helpful if you can answer that question for me thank you so much for your time

My 720 A pressure vacuum breaker broke. Can I replace it with a Cheaper one or do I need the same one?

I have 2 videos on my channel about problem of the febco water comeing out. When i open the main valve mo leakage. As soon i open the second valve going to the spronkler leaking. It seems that there is a back pressure. However when i open slowly the second valve sometime it is ok. However even when no leakage the sprinkler pressure is low. I must say that just replace the bonnet with a bonnet repair kit.Can you tell me want is the problem? Thanks

today i installed a 2 inch backflow for commercial and don't know what it's for. that's why im here (yes i installed it correctly).

To register water going through the meter, the back flow should be on or off?

I noticed that we have an old BFP, should i replace it with a lead free model , if some which one would you recommend ? We current have an Apollo 40205T2, thank you

Just bought a home the inspector from my city said I needed a vacuum breaker. (I’m guessing inside my water meter) do I need the last one you showed an example of?

PVB should not be under influence of backpressure, not designed for that type of backflow condition. Think you mean backsiphone should city pressure drop below atmospheric pressure.

Do I need to bleed out my BFP and how do I do that?

What if I have reclaim water?

Question for you! I already have one of these installed on our water supply in the backyard and it goes to our pool....is there a way to use this as well for sprinklers or do I need a second PVB...or is my idea impossible?

Can I run 2 separate controllers off the large BFP you showed? I got a system with 13 zones and wanna run 4 zones off another controller

If I had to do one for a restaurant on all the water equipment like the soda machines I wouldn't use that big device would i

Hello, I have a choice on purchasing a new house in which one property requires a backflow preventer and another one doesn't need one. My question is what home should I purchase? I have no idea what would be the better decision. Can anyone help answer this please. The house is a new build and looking at the site plans, some homes require one and some dont. Thank you!!

Is the last back flow preventer you showed on this video, the one you described as often used in lawn irrigation systems, called a vented, multi-port bfp? My local code calls for such a device but when I googled that name there were no devices named exactly that. Thanks.

Hey what's up, do you know if a BFP is required for a residential property?

Is it supposed to leak water?

Do we need to do anything to winterize it? Ours bursted last year during the freeze. Is there anything we can do to prevent this?

this is great thanks, what kind would i use for a commercial Ice maker?

If you have a well that does both your drinking water and irrigation, you really should still have one, no? Same idea, don't want chemicals leeching back into the house.. Could you explain how to test the back flow preventer?

Is a residential backfill preventer still necessary if your irrigation system is connected to reclaimed water?

Whats the difference with the small garden brass ones and the larger one for residential sprinklet?

Thank you. So what can I do about my sewer that backs up at least once a month. I notice that we cannot flush too much toilet paper. Is there anything that you recommend i do?

Like they are getting our drinking water from the ground and thats the same ground that our septic drainfields go to so dont you think its allready got chemicals and wierd stuff in it? Just more expenses in an allready squeezing the water out of a turnip cost of living.

Good video. Is the first type of small vacuum breaker sufficient for using on a small residential irrigation drip & pop-up sprayer system that's connected through a timer on a hose spigot? Or would we need to install one of those bigger ones?

Thanks f or the video!

Thank you for the video! One quick follow-up question: I need to replace my BFP and it is the Zurn Wilkins 720-A that you show in the video. However, Amazon sells different sizes from .5 inch to 1.5 inch. How do I tell which one I have? There are no model numbers on my existing BFP, unfortunately, and the threaded pipes look to me to be 1 3/8 inch, so not sure what to buy

Where should I place my back flow preventer? Where should I tie it into my main?

What's the name of each

Only for city water means the heck with rural groundwater quality?

Why not use on a well? I would think you would want to protect the well water.

Can you use those test ports as water spigots? Like in a building that doesn't have a water spigot on the outside, can I hook up a water hose to it?

Do you recommend these if your system runs off of a well water system and not a city system?

I have a feeling you mix vacuum breakers with backflow preventers. They are not the same thing.

why don't the water companies build them into their water meters?

Does this work for sewer back up?

My valve appears to leak 24/7. This is obviously not normal. Does anyone know the cause of this? How to fix it? My relief valve is built basically like the big one he had on the table. It doesn’t supply my entire home. It only supplies the sprinkler system. The sprinklers work fine

Thank you for NOT using "Shorts" video for this video. "Shorts are hard to see & hard to interact with. I will not watch a "shorts" video. Most people that I converse with, will not watch shorts. KZfaq forces this stuff onto people. So.. Thank you for not uploading to it.

Not a very detailed description of how these work. What is the function of each of the parts? I expected more detail....

Water heater backflow cold line to tank is hot how is that I'm on a job i have no answer

name the different BFP's per their type

For wells, You don't need one?

So many videos on youtube about back-flow on sprinkler systems..l. check your local code... Just about all of them only require backflow preventing on irrigation system when they are integrated with fertilizer system. in that case it makes sense but otherwise this is a waste of your money especially if you're hiring one of these guys to come install it for you.

You're explanation is incorrect. A vacuum breaker does NOT protect against back pressure, only siphonage.

"if its a well you really don't need it" - maybe not mandated by code but who would knowingly allow the contamination of ground water!? Who knows how many of your neighbors are drinking that water. Shouldn't we install BFP anyway?

This seemed like more of a ‘why’ than ‘how’

You don’t know what you’re talking about. You can only test in RPZ or a DCV . You cannot check to see if a Vacuum breaker valve works or not. There is no test for.

Do you have a video showing step by step how to install the irrigation system inside of the basement of a home