2" 25AUB-Z3 Pressure Reducing Valve (Threaded F Union Inlet x NPT Threaded F Outlet) Zoom

2" 25AUB-Z3 Pressure Reducing Valve (Threaded F Union Inlet x NPT Threaded F Outlet)

SKU:0070336

Brand: Watts

Watts
0070336 has been discontinued.
Direct Replacement:
SKU: 0009465
Brand: Watts

Do not use this item for any installation or repair of potable water applications. This product does not comply with the "Safe Drinking Water Act," which requires that products meet low-lead standards in order to be used in systems providing water for human consumption (drinking or cooking). This item is for non-potable (non-human consumption) water applications only.

2

Specs

Size: 2"
Pressure Range: 25 to 75 psi
Max Pressure (PSI): 75 psi
Min Pressure (PSI): 25

Description for Watts 0070336


Series 25AUB-Z3 Water Pressure Reducing Valves are used in commercial and residential applications to reduce incoming water pressure for protection of plumbing system components and to reduce water consumption. It consists of a bronze body construction, union inlet connection, integral stainless steel strainer and high temperature resistant reinforced diaphragm for hot water.
The Series 25AUB-Z3 is available with a variety of end connections including: threaded, solder, PEX and CPVC with both union and double union connections.
Series 25AUB-Z3 has an adjustable pressure range and is serviceable in-line. Maximum Working Pressure: 300psi (21 bars), Adjustable Reduced Pressure Range: 25 to 75psi (172 to 517 kPa), Standard Pressure Setting: 50psi (344kPa).

2" 25AUB-Z3 Pressure Reducing Valve (Threaded F Union Inlet x NPT Threaded F Outlet)

REVIEW SNAPSHOT®

by PowerReviews
Watts3/4"" LF25AUB-Z3 Pressure Reducing Valve (Threaded F Union Inlet x NPT Threaded F Outlet)
 
4.8

(based on 29 reviews)

Ratings Distribution

  • 5 Stars

     

    (25)

  • 4 Stars

     

    (3)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

97%

of respondents would recommend this to a friend.

Pros

    Cons

      Best Uses

          • Primary use:
          • Personal (19), Business (10)

        Most Liked Positive Review

         

        Nice reducer. I was impressed.

        I had a situation that this house is located in the mountains and the city was raising the water pressure in order to get the water to the top of the mountain. With the...Read complete review

        I had a situation that this house is located in the mountains and the city was raising the water pressure in order to get the water to the top of the mountain. With the pressure guage I purchased with this regulator, I found that the water pressure was rising to 160Lbs. and sometimes more. This was causing the popoff on the water heater to bleed off pressure over 180 the rating of the valve loosing hot water. Also faucets would leak when there wasn't a problem with them. Installing the regulator was somewhat easy. I cut into the existing copper line under the house. I added the adapters that will make it easy to just unscrew the unit if I need to replace it for some reason. I also added a valve past the regulator so that I could attach my pressure guage to check the pressure before I crawled out from under the house. I have tested the pressure over and over and it is working great.

        VS

        Most Liked Negative Review

         

        Has some construction issues

        I used this product on an incoming water main line to our residence with input pressure of 80psi and I wanted to reduce it to 54psi.

        I like the product and it...Read complete review

        I used this product on an incoming water main line to our residence with input pressure of 80psi and I wanted to reduce it to 54psi.

        I like the product and it appears well build and durable. However, the first two units installed were defective from the factory and they would allow outgoing pressure to "creep" from the 54psi setting all the way to 75psi within an hour.

        Upon the installation of the third unit the pressure has been holding precisely at 54psi now for the past couple of months and all is well.

        It just took me the time and effort to install three units to finally get a good one which we now have installed.

        Reviewed by 29 customers

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        3.0

        Has some construction issues

        By David Louis

        from Comfort, Texas

        Verified Buyer

        Pros

          Cons

            Best Uses

              Comments about Watts 3/4"" LF25AUB-Z3 Pressure Reducing Valve (Threaded F Union Inlet x NPT Threaded F Outlet):

              I used this product on an incoming water main line to our residence with input pressure of 80psi and I wanted to reduce it to 54psi.

              I like the product and it appears well build and durable. However, the first two units installed were defective from the factory and they would allow outgoing pressure to "creep" from the 54psi setting all the way to 75psi within an hour.

              Upon the installation of the third unit the pressure has been holding precisely at 54psi now for the past couple of months and all is well.

              It just took me the time and effort to install three units to finally get a good one which we now have installed.

              • Primary use:
              • Personal
               
              4.0

              I would buy this product again

              By Vmarc

              from SYRACUSE, NY

              Verified Buyer

              Pros

                Cons

                  Best Uses

                    Comments about Watts 3/4"" LF25AUB-Z3 Pressure Reducing Valve (Threaded F Union Inlet x NPT Threaded F Outlet):

                    It lasted around 20 years

                    • Primary use:
                    • Personal
                     
                    5.0

                    watts prv

                    By john the plumber

                    from frostburg md.

                    Verified Buyer

                    Pros

                      Cons

                        Best Uses

                          Comments about Watts 3/4"" LF25AUB-Z3 Pressure Reducing Valve (Threaded F Union Inlet x NPT Threaded F Outlet):

                          watts valves are always a good choice. I chose this valve for a commercial application and it has been working flawlessly.

                          • Primary use:
                          • Business
                           
                          5.0

                          Did the job as needed

                          By Carlos

                          from Pasadena, Texas

                          Verified Buyer

                          Pros

                            Cons

                              Best Uses

                                Comments about Watts 3/4"" LF25AUB-Z3 Pressure Reducing Valve (Threaded F Union Inlet x NPT Threaded F Outlet):

                                We were able to connect to the fire water line by reducing the pressure and have access to wash-down water from the same water source.

                                • Primary use:
                                • Business
                                 
                                5.0

                                Keeps the pressure acurately

                                By Mansion Owner

                                from Pawtucket RI

                                Verified Buyer

                                Pros

                                  Cons

                                    Best Uses

                                      Comments about Watts 3/4"" LF25AUB-Z3 Pressure Reducing Valve (Threaded F Union Inlet x NPT Threaded F Outlet):

                                      Sent out quickly

                                      • Primary use:
                                      • Personal
                                       
                                      5.0

                                      Home water pressure regulator

                                      By Ken

                                      from Salt Lake City, Utah

                                      Verified Buyer

                                      Pros

                                        Cons

                                          Best Uses

                                            Comments about Watts 3/4"" LF25AUB-Z3 Pressure Reducing Valve (Threaded F Union Inlet x NPT Threaded F Outlet):

                                            I was having problems with my house water pressure always climbing above my set point pressure. I am familiar with the Watts product line and was not hesitant to order it. The great thing is I have a wide selection with Pexsupply with all the data I need to make a knowledgeable choice. That's the reason I keep coming back.

                                            • Primary use:
                                            • Personal
                                             
                                            4.0

                                            Pressure reducing valve

                                            By Jimmy

                                            from Jacksonville, FL

                                            Verified Buyer

                                            Pros

                                              Cons

                                                Best Uses

                                                  Comments about Watts 3/4"" LF25AUB-Z3 Pressure Reducing Valve (Threaded F Union Inlet x NPT Threaded F Outlet):

                                                  needed to reduce the pressure to one of our car wash pieces of equipment.

                                                  • Primary use:
                                                  • Business
                                                   
                                                  5.0

                                                  Nice product

                                                  By Plumberandy

                                                  from Georgia

                                                  Verified Buyer

                                                  Pros

                                                    Cons

                                                      Best Uses

                                                        Comments about Watts 3/4"" LF25AUB-Z3 Pressure Reducing Valve (Threaded F Union Inlet x NPT Threaded F Outlet):

                                                        Installed easily in a vault outside. Used rock around it to give it drainage. Like the union end, wish pexsupply offered double unions but I used a brass union on the outlet side and it worked great. This is a quiet PRV. The factory setting was around 52 psi.

                                                        • Primary use:
                                                        • Business
                                                         
                                                        5.0

                                                        will buy from them again

                                                        By happy

                                                        from Ivyland,PA.

                                                        Verified Buyer

                                                        Pros

                                                          Cons

                                                            Best Uses

                                                              Comments about Watts 3/4"" LF25AUB-Z3 Pressure Reducing Valve (Threaded F Union Inlet x NPT Threaded F Outlet):

                                                              Price and quick shipment. satisfied.

                                                              • Primary use:
                                                              • Business
                                                               
                                                              5.0

                                                              High quality

                                                              By Plumberandy

                                                              from Newnan, Ga.

                                                              Verified Buyer

                                                              Pros

                                                                Cons

                                                                  Best Uses

                                                                    Comments about Watts 3/4"" LF25AUB-Z3 Pressure Reducing Valve (Threaded F Union Inlet x NPT Threaded F Outlet):

                                                                    Great product. Better quality than what you get at the box stores. Just wish you offered one with two unions.

                                                                    • Primary use:
                                                                    • Business

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                                                                    Q&A: Ask the Questions, share answers

                                                                    Do you have questions about this product?

                                                                    get answers from real customers and in-house experts with AnswerBox.

                                                                    10 Questions | 10 Answers
                                                                    Displaying questions 1-10
                                                                    • Q:

                                                                      what is the maximum flow rate?
                                                                      Asked on 6/16/2014 by doc

                                                                      1 answer

                                                                      • CUSTOMER CARE

                                                                        A:

                                                                        The maximum flow rate is approximately 30 gallons per minute when operating at the reduced pressure drop of 25 PSI.

                                                                        Answered on 6/17/2014 by SupplyHouse Staff from NY
                                                                    • Q:

                                                                      Can this valve be installed in the vertical position?
                                                                      Asked on 2/11/2014 by Mucks from Yuma

                                                                      1 answer

                                                                      • CUSTOMER CARE

                                                                        A:

                                                                        Yes, this line of Pressure Reducing Valves can be installed in the vertical position.

                                                                        Answered on 3/7/2014 by PexSupplyStaff from New York
                                                                    • Q:

                                                                      i have a 1/2" LF25AUB-Z3 Pressure Reducing Valve (Threaded F Union Inlet x NPT Threaded F Outlet). i would like to know how to increase the pressure in my home. i believe to do so you would loosen the nut on the top and turn the screw on the top counter clock wise. am i correct.? should i turn off the house main?
                                                                      Asked on 10/6/2013 by don from branchville, nj

                                                                      1 answer

                                                                      • CUSTOMER CARE

                                                                        A:

                                                                        The instruction manual states "To adjust pressure setting, loosen
                                                                        the lock nut and turn the adjusting bolt clockwise to increase pressure, counterclockwise
                                                                        to decrease pressure." The manual can be found here on our site :

                                                                        http://s3.pexsupply.com/product_files/es-lf25aub-inst.pdf

                                                                        Answered on 10/17/2013 by PexSupply Staff from NY
                                                                    • Q:

                                                                      I am concerned about getting the right valve... this model vs. the high/low pressure versions. My city supply fluctuates a lot. I recall pressures as high as 95psi, sometimes higher. I currently have a similar Watts PRV on my system and regardless of where I set the valve the max pressure I am pulling is 40 psi. So my question is four part...

                                                                      1. Is my current PRV working properly?

                                                                      2. Which version of this PRV would work best for my situation: this model, low or high models?

                                                                      3. Is there any benefit to running two of these or a combination of models in series?

                                                                      4. If I install a back-flow preventer, should I install it up or downstream of the PRV(s)?
                                                                      Asked on 7/8/2012 by Brandon from Cincinnati, OH

                                                                      1 answer

                                                                      • VERIFIED BUYER

                                                                        A:

                                                                        Yes.
                                                                        This Model would work fine.
                                                                        95psi is well within the range of a single prv. Watts offers a great
                                                                        diagram in their product manual to describe the parallel and in series
                                                                        concept.
                                                                        I wouldn't worry about installing a backflow preventer unless required by
                                                                        code. The PRV will essentially create a closed system so you need to
                                                                        consider a thermal expansion tank for your water heater. A great resource
                                                                        is Water Heater Rescue.
                                                                        -Rob

                                                                        Answered on 7/9/2012 by Anonymous
                                                                    • Q:

                                                                      Highrise building with a 3" hot water line, max temp is 140 degrees F. The cold feeding the domestic boiler is 50 lbs. When the circulating pump is on (24/7) the presure is increased to 65lb. I need to lower the presure from 65 lbs to 50 lbs. Should I use a u5b-z3 or a 25aub-z3.
                                                                      Also what and why is there a thermal bypass? Thanks
                                                                      Asked on 5/26/2012 by Chuck from San Francisco, CA

                                                                      1 answer

                                                                      • VERIFIED BUYER

                                                                        A:

                                                                        Not sure about the u5b-z3, or the 25aub-z3, but I'd guess the u5b since it's made for commercial applications. But neither have a 3" inlet/outlet pressure. Both max out at 2".
                                                                        The thermal bypass function is to compensate for water heater caused pressure on the outlet side. Since water heaters increase the pressure of the water (by heating it), that water pressure can push back on the outlet side of the pressure valve, which can increase to the point of causing knocking in pipes, or bad bursts of pressure when you turn on cold water. In your case, it shouldn't be an issue, since this issue is, as far as I know, only going to be seen when the valve is used on cold water supply, or if the water was going to be heated further on the outlet side of the valve.
                                                                        From their standards section (https://www.wattspremier.com/products.php?product=Watts-107001-U5B%252dZ3-Whole-House-Water-Pressure-Regulator): standard Specifications: A Water Pressure Reducing Valve with integral strainer shall be installed in the water service pipe near its entrance to the building where supply main pressure exceeds 60psi (413 kPa) to reduce it to 50psi (345 kPa) or lower. The valve shall feature a bronze body suitable for water supply pressures up to 300psi (20.7 bar). Provision shall be made to permit the bypass flow of water back through the valve into the main
                                                                        when pressures, due to thermal expansion on the outlet side of the valve, exceed the pressure in the main supply. Water Pressure Reducing Valve with built-in bypass check valves will be acceptable. Approved valve shall be listed to ASSE 1003 and IAPMO and certified to CSA B356. Valve shall be a Watts Regulator Company Series U5B-Z3.
                                                                        Good luck!

                                                                        Answered on 5/30/2012 by Anonymous
                                                                    • Q:

                                                                      What size expansion tank do I need with it and is it a special expansion tank? I have 135# on the street side and have the reducing valve set on 50#. What should the air pressure in the tank be?
                                                                      Asked on 11/9/2011 by Farmer John from Hannibal, MO.

                                                                      1 answer

                                                                    • Q:

                                                                      What is the part # for the male NPT to Sweat adapter I need to connect this PRV to a 3/4" copper line.
                                                                      Asked on 6/24/2011 by Anonymous

                                                                      1 answer

                                                                      • CUSTOMER CARE

                                                                        A:

                                                                        You would need part WP4-12.

                                                                        Answered on 6/27/2011 by PexSupply Staff from NY
                                                                    • Q:

                                                                      What is the overall length of this valve without the inlet fitting attached?
                                                                      Asked on 5/11/2011 by Anonymous

                                                                      1 answer

                                                                    • Q:

                                                                      Is this valve also call a control fill valve
                                                                      Asked on 12/15/2010 by jacuzzi

                                                                      1 answer

                                                                      • CUSTOMER CARE

                                                                        A:

                                                                        No--this is a reducing valve.

                                                                        Answered on 12/16/2010 by PexSupply Staff from NY
                                                                    • Q:

                                                                      Can I use this pressure reducing valve for irrigation water. I have a y strainer with 150 mesh upstream of where I would like to install this.
                                                                      Asked on 9/21/2010 by Anonymous

                                                                      1 answer

                                                                      • CUSTOMER CARE

                                                                        A:

                                                                        The specifications listed for this product do not state if it can be used for irrigation water so we would have to advise against using it in such an application.

                                                                        Answered on 9/22/2010 by PexSupply Staff from NY
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