Model # 112-350XL

Internet #203999065

0612052071558

Zurn-Wilkins

1-1/2 in. Lead-Free Double Check Valve Assembly

$ 385 22
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Frequently Bought Together

Frequently Bought Together

Product Overview

The Zurn Wilkins Model 350XL Backflow Preventer features a patented removable pressure vessel, facilitating check access for easy cleaning and repair. The valve is designed for installation on potable water lines to protect against both back-siphonage and backpressure of polluted water into the potable water supply. This backflow preventer is suitable for use in residential, commercial, industrial, and irrigation applications where a health hazard does not exist.
  • Removable pressure vessel is serviceable offline and reusable, resulting in reduced labor costs, the ease of repair and replacement significantly decreases water system downtime by 300 percent, a benefit for both service professional and end user
  • Made of UV resistant composite material, the pressure vessel exceeds bronze performance levels, including severe water conditions, the composite material also acts as a theft deterrent, with less bronze material used in the overall production
  • Top access to test cocks and shutoff valves and check assembly makes the unit easy to test
  • Easy to winterize by removing pressure vessel between shutoff valves
  • Short lay length
  • ASSE listed 1015, IAPMO listed, CSA certified B64.5, AWWA compliant C510, approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California, NSF listed - Standard 61, annex G
  • California residents see Prop 65 WARNINGS

Product Overview

Model #: 112-350XL
Internet #: 203999065

The Zurn Wilkins Model 350XL Backflow Preventer features a patented removable pressure vessel, facilitating check access for easy cleaning and repair. The valve is designed for installation on potable water lines to protect against both back-siphonage and backpressure of polluted water into the potable water supply. This backflow preventer is suitable for use in residential, commercial, industrial, and irrigation applications where a health hazard does not exist.

  • Removable pressure vessel is serviceable offline and reusable, resulting in reduced labor costs, the ease of repair and replacement significantly decreases water system downtime by 300 percent, a benefit for both service professional and end user
  • Made of UV resistant composite material, the pressure vessel exceeds bronze performance levels, including severe water conditions, the composite material also acts as a theft deterrent, with less bronze material used in the overall production
  • Top access to test cocks and shutoff valves and check assembly makes the unit easy to test
  • Easy to winterize by removing pressure vessel between shutoff valves
  • Short lay length
  • ASSE listed 1015, IAPMO listed, CSA certified B64.5, AWWA compliant C510, approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California, NSF listed - Standard 61, annex G
  • California residents see Prop 65 WARNINGS

Info & Guides

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Specifications

Dimensions

Inlet Size (in.)
1.25
Outlet Size (in.)
2 or less
Product Height (in.)
6
Product Length (in.)
6.75
Product Width (in.)
15.25

Details

Compatible Pipe Material
Multi-Purpose
Connection
FIP x FIP
Installation
Below Ground
Irrigation System Component
Valve
Material
Brass
Maximum Pressure (psi)
140
Maximum Working Temperature (F)
170
Number of Outlets
0
Operation
Automatic
Package Quantity
1
Pressure Rating
175
Product Weight (lb.)
20 lb
Returnable
90-Day
Thread Type
FIP
Valve Type
Reduce Pressure Zone

Warranty / Certifications

Manufacturer Warranty
All goods sold hereunder are warranted to be free from defects in material and factory workmanship for a period on one year from date of purchase.

Specifications

Dimensions

Inlet Size (in.)
1.25
Outlet Size (in.)
2 or less
Product Height (in.)
6
Product Length (in.)
6.75
Product Width (in.)
15.25

Details

Compatible Pipe Material
Multi-Purpose
Connection
FIP x FIP
Installation
Below Ground
Irrigation System Component
Valve
Material
Brass
Maximum Pressure (psi)
140
Maximum Working Temperature (F)
170
Number of Outlets
0
Operation
Automatic
Package Quantity
1
Pressure Rating
175
Product Weight (lb.)
20 lb
Returnable
90-Day
Thread Type
FIP
Valve Type
Reduce Pressure Zone

Warranty / Certifications

Manufacturer Warranty
All goods sold hereunder are warranted to be free from defects in material and factory workmanship for a period on one year from date of purchase.

Questions & Answers

Can this valve be put below ground level in a valve box?

Can this valve be put below ground level in a valve box?
Asked by: Phil
Not according to local code and installation instructions
Answered by: HomeDepotCustomer
Date published: 2018-08-31

will this valve input fertizer into system

Asked by: hstot
It is not designed to input fertilizer. It is a only a backflow preventer. It can (approved by the plumbing code), however, work with systems which add fertilizer to water, as long as it is added after the double check valve.
Answered by: AIPDX
Date published: 2019-04-03

where are the instruction for installation and testing?

where are the instruction for installation and testing?
Asked by: chuck
Installation instructions are in the box. They are very simple: water goes in on one side, out on the other, and should flow in a specific direction. Assembly can be installed either vertically or horizontally, can be before valves, and can be at any level relatively to sprinklers. Testing requires a special test kit which is a device with several pressure gauges, knobs and connecting hoses (e.g., Watts TK-99E, or Watts TK-9A, etc.) which cost from around $1000 for the basic kit to over $12,000 for high-end digital tester; the testing procedure contains over 20 steps. There may be ways to validate that the valve assembly prevents backflow using a home-made system, but it is unlikely that all steps in the standard testing (which includes detection of weak springs, for example) can be done without a factory-made testing kit. Testing is usually done by a technician who works for the water district. Normally, water districts expects customers who reported to them that they have a double check valve assembly to pay for a test annually, so it is not a one-time test.
Answered by: AIPDX
Date published: 2018-12-02

Can this valve be used if both shut off valves have been removed?

Manufacturer required installation
Asked by: Jkelly
These shut-off valves are not required for operation (they are normally open), but they are required for testing. Testing is not something that you do. It requires special equipment. Formally, homeowners are expected to get a permit for installation of a sprinkler system and then pay annual fee for someone to come, test, and validate that the double check valve (which is a backflow prevention device which prevents water from the irrigation system from being siphoned back into the city water supply) works properly. This testing requires that both valves are present. The four little connectors on the side of the assembly are there specifically for the testing purposes (note that one of them is on the valve which you want to remove), to validate that it indeed prevents backflow as designed. Without shut-off valves it will still work, but will not pass the inspection associated with the permit application and the annual test will be impossible.
Answered by: AIPDX
Date published: 2019-04-03
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Customer Reviews

1-1/2 in. Lead-Free Double Check Valve Assembly is rated 4.7 out of 5 by 20.
Rated 4 out of 5 by from This double check backflow preventer is easy to install and works well. The brass body feels like... This double check backflow preventer is easy to install and works well. The brass body feels like it is good quality and will last a while. The design of this backflow preventer makes it easy to service if something fails. I installed this backflow preventer on my irrigation system last summer and it seems to have held up well. I live in Southern California so I do not have to worry about freezing, so I do not need to worry about winterization.
Date published: 2019-02-27
Rated 5 out of 5 by from The “take off “ was the same as my old... The “take off “ was the same as my old valve therefore it just screwed in without having to refit piping
Date published: 2018-12-26
Rated 5 out of 5 by from Quality product This valve arrived on time, the stop cocks were all preset and it installed without a hitch. It works better than the original equipment. We will just have to see how long it lasts. West Des Moines water is so full of minerals, nothing lasts very long. Compared to the others I looked at, this one was certainly the most cost effective
Date published: 2015-10-06
Rated 4 out of 5 by from Replaced broken 975XL with this for 1/2 price. Easy install.... Replaced broken 975XL with this for 1/2 price. Easy install. Needed a few extra PVC pieces for length adjustment to fit old pipes ( shorter). Would have given 5 stars if blow-out adapter had been included.
Date published: 2018-10-30
Rated 5 out of 5 by from Good product, good price, quick delivery.Good job.... Good product, good price, quick delivery.Good job.
Date published: 2018-06-20
Rated 5 out of 5 by from Easy to install and durable quality. Easy to install and durable quality.
Date published: 2018-06-05
Rated 5 out of 5 by from Good workmanship...easy to use. Good workmanship...easy to use.
Date published: 2018-06-02
Rated 5 out of 5 by from easy to install. Workd well... easy to install. Workd well
Date published: 2018-06-12
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