This product has been certified by ASSE International to meet safety and performance standards for plumbing and mechanical systems

Thanks for the help. Ill see if can get the kit to rebuild the unit if not just replace it. Is there anything else I should bother testing or doing as well? Thanks again for the help!!!

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WARNING:This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.p65warnings.ca.gov.

On the top cap there should be the make, model and size of the device, The size could be on the side of the device, also. Sounds like the pressure vacuum breaker needs to be rebuilt. I usually replace the check piston seal, the poppit seal and the cap o-ring.

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Hey guys, I decided to replace the backflow preventer to make sure there couldn't be anything wrong with it. Unfortunately the problem still persists. I really don't know what else could be wrong. Could it be some zone valves that are bad or the controller? I really hoped that the problem would be fixed. If you guys need anymore information please let me know.

As long as the ball valves work good,I would just rebuild it. Replacing the device requires soldering. Its usually cheaper to buy a whole device and rob all the parts from it to rebuild your device.

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This product is certified by the International Association of Plumbing and Mechanical Officials (IAPMO) to meet Uniform Plumbing Code (UPC) standards for the USA

This product has been certified by the Canadian Standards Association (CSA) to meet select standards for electrical, plumbing, and/or mechanical products in the United States and Canada.

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This item has been certified by NSF International to meet applicable product standards on public safety, health, and / or the environment.

Hello guys, I have a quite problem going on with my sprinkler system. My problem is as follows. Today around 4am I woke up to extremely loud banging coming from the water line going out to the sprinkler system. Im not sure where exactly the sound if coming from but it is from that line. I went outside to see the backflow preventer and it was shaking and expelling water from the top. While this was all occurring there was still water flowing through the zones but at a reduced pressure. I assume that it had just switched zones. I stopped the banging by shutting off the water valve before the backflow preventer. The problem would persist if the valve was not fully closed. This issue does not always happen, but it seems to be increasing in occurrence. I've installed a check valve and a water hammer arrestor but the problem still persists. I don't know what else to do. Any help would be greatly appreciated. Thank you! This is similar to the backflow preventer I have: [images.homedepot-static.com] Edited 1 times.

This Watts 1 1/2" anti-siphon pressure vacuum breaker is designed to prevent backsiphonage of contaminated water into a potable water supply. It's ideal for irrigation systems, industrial process water systems, and other continuous pressure piping system applications where water enters the equipment at or below the flood rim. This vacuum breaker has a 1 1/2" inlet and outlet size, and it features a cast copper silicon alloy body, stainless steel springs, and silicone rubber discs. It also allows for easy maintenance of internal parts.This vacuum breaker's disc float and check valve are suitable for temperatures up to 140 degrees Fahrenheit with a range of 33 to 140 degrees Fahrenheit and a maximum working pressure of 150 PSI. It features an O-ring bonnet seal for less possibility of fouling, and an acetal bonnet acts as a freeze plug, preventing body damage. Plus, this vacuum breaker can be used with SentryPlus Alert (sold separately) to activate the freeze sensor, which indicates when temperatures near the freezing point, helping to reduce or eliminate equipment replacement or repair. Additionally, this vacuum breaker has a compact and space-saving design and is equipped with a tee handle quarter turn ball valve. No special tools are required for servicing.Overall Dimensions:Length: 9 1/4"Height: 9 1/2"