Model # 34-70XLDU

Internet #202268544

Store SKU #246499

Zurn-Wilkins 3/4 in. x 3/4 in. Brass Water Pressure Reducing Valve


3/4 in. x 3/4 in. Brass Water Pressure Reducing Valve

  • Features a low-lead brass construction
  • Reducing valve has a double union
  • Accommodates a maximum pressure of 300 PSI
$8378 /each
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Product Overview

An ideal choice for your project, the Zurn-Wilkins 3/4 in. x 3/4 in. Water Pressure Reducing Valve features low-lead brass construction. This double union valve can accommodate a maximum pressure of 300 psi. Product meets low lead standards.

  • Low-lead brass
  • Water pressure reducing valve
  • Double union FNPT
  • 3/4 in. inlet
  • 3/4 in. outlet

Info & Guides

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Name 3/4 in. x 3/4 in. Brass Water Pressure Reducing Valve 3/4 in. Brass FPT x FPT Pressure Reducing Valve 1 in. Lead-Free Bronze Water Pressure Reducing Valve with Double Union Female Copper Sweat 3/4 in. Lead-Free Bronze Water Pressure Reducing Valve with Double Union Female Copper Sweat
Brand Zurn-Wilkins Watts Zurn-Wilkins Zurn-Wilkins
Ratings (9) (34) (10) (9)
Valve Outlet Diameter (in.) .75 .75 1 .75
Connection FIP FIP x FIP Copper Sweat Copper Sweat
Valve Inlet Diameter (in.) .75 .75 1 .75
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Product Depth (in.)
Product Height (in.)
Product Length (in.)
Product Width (in.)
Valve Inlet Diameter (in.)
Valve Outlet Diameter (in.)


Water Supply
Compatible Pipe Material
Black malleable iron
Maximum Pressure (psi)
Maximum Working Temperature (F)
Product Weight (lb.)
Valve Type
Pressure Regulating

Warranty / Certifications

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

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Customer Questions & Answers

can this valve be used out doors and is it female sweat?

Asked by: Dee
I install indoor side.
Answered by: SanDiego7
Date published: 2017-04-02

Does this come with (2) unions, (2) gaskets, and (2) FNPT fittings?

Does this come with (2) unions, (2) gaskets, and (2) FNPT fittings?
Asked by: handyman
The double union type comes with all.
Answered by: SanDiego7
Date published: 2017-04-02

what is the maximum pressure it can be set to?

Asked by: customer
As high as your water pressure is at your location. Tighten the screw all the way and it will put full available pressure to the downstream end. Of note, please do not exceed 60 PSI for most household water pipes. Anything more would be dangerous for the occupants and hard on the pipes if there are some odd anomalies within your plumbing such as hydraulic hammering and such.
Answered by: keneke007
Date published: 2017-02-25

Installation in copper pipe

The installation instructions do not explain the connections. Can 3/4" copper pipe be soldered directly to the tailpieces? Are other copper pipe fittings required? What is the correct face-to-face dimension between installed tailpieces to fit in the valve and gaskets?
Asked by: billh
Yes, bronze is compatible with copper lines for fresh water. If it were salt water I would suggest you install zincs or electronic corrosion protection.
Answered by: keneke007
Date published: 2016-11-09
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Customer Reviews

3/4 in. x 3/4 in. Brass Water Pressure Reducing Valve is rated 3.9 out of 5 by 9.
Rated 5 out of 5 by from Good value Recently in my home, after 8 years of trouble free water service, always coming in from the street at 60 psi. I came home to a burst garden hose and a small flood in my back yard. Upon checking water pressure it was at 98-102 psi. WAY high. After I verified there was no reducing valve at the meter, it was time to install one. This seems to be a very high quality unit, factory pre set at 50 psi. I only see a 2 psi drop while water is flowing, (shower). It is a little noisy but that would be true with all pressure reducing valves. This unit does not knock or rattle the pipes like alot of other units. Came with two 3/4" female NPT threaded union ends.
Date published: 2017-07-27
Rated 5 out of 5 by from My old pressure valve started leaking from the stem area and making knocking noise, so I changed ... My old pressure valve started leaking from the stem area and making knocking noise, so I changed this product. The union coupling is easy to modify my old pipe line as well as easy to install. Overall I like this product. I just want to add one thing. Good flux (liquid, not cream) for soldering copper pipe is absolutely needed to secure pipe line.
Date published: 2017-04-02
Rated 4 out of 5 by from Works well, as good as any other that I have seen and very reasonable. NO plastic in these, and I prefer the 70XL model because many of the cartridge parts are stainless steel, not brass or plastic. Check the specs. Easy to install with double unions (and much easier to replace if needed, as you unbolt the unions and slide the regulator out). DO OT OVER TIGHTEN THE THREADER PIPE SECTION OF THE UNION OR THE UNIONS ONTO THE VALVE BODY, I have seen the brass unions split and/or the gasket distort from over tightening. Use good (yellow or blue) Teflon tape and/or Teflon pipe dope. Use a little pipe dope or sealant on the union gasket. These pressure reducing valves all work pretty much the same, the replacement cartridge system is much easier to replace then the older models with a multitude of pieces that are often frozen/rusted in place. I have installed one 70XL on the main line and then two NR3XL in series with the main regulator on irrigation/pool water systems. These are set at lower pressures. The all worked as they should, the 70XL has better flow ratings. Some individuals complain that they do not hold pressure at their set levels under use. Please understand that with these pressure reducing valves, you will always see some drop in line pressure when they are in use which is proportional to the flow rate. I set the 70XL at 60 PSI with an inlet pressure of 95-105 PSI, the post valve pressure drops to 45 PSI with high water demand. It is very steady with minimal fluctuations. The pressure drop is also affected by the street water pressure, flow rating of the water meter and pipe sizing. With very hard water (which we have in Arizona), Even the best water pressure reducing valves usually only last a couple of years until needing to be rebuilt according to our local plumbers (and they charge an arm and a leg to repair/replace them). The bell housing on most models is not completely sealed at the threads of the adjustment bolt, so if placed underground consider placing them in an irrigation box so they are not covered with water/mud. You don't want to be digging them out of the ground which I commonly see and the spring and diaphragm disc are a mass of rust. The main downside on almost all residential pressure reducing valves is the cost of the repair kit is almost as much as a new unit. I bought a second 70XL, when the time comes for replacement, either I will spin off the top and drop in a new cartridge from the new unit, or undo the unions and just slide in the new unit. Then rebuild the old unit for the next round. I give this pressure reducing valve 4 stars at Home Depot, because of the three that I purchased, all three had been opened and two were missing parts (washer/union). So check the box before you leave the store.
Date published: 2013-12-08
Rated 5 out of 5 by from Reduced pressure from 120 to 76 PSI Set up was easy except for the two feet of clearance I had in the crawl space. I couldn't under stand why the HWT relief valve was leaking, even after I replaced it. I checked the tank heating elements and noticed that the top element was leaking slightly. The Republic Thermoglas 66 gal tank was installed in 1973 when the house was built. Decided to replace the tank and attached a WP gauge on the hose bib to find 110-120 PSI without HWT on. The PSI jumped to 160 PSI with power to the HWT. I installed a Watts DET-5 thermal expansion tank since the system became "closed" after installing the Water Pressure Valve. Now the system is working great and the maximum pressure is 80 PSI with the HWT energized. The new GE 12 yr warranty 50 gallon tank rests in a drain pan, so when it fails probably in 10 years, I won't have water damage.
Date published: 2014-04-10
Rated 3 out of 5 by from for the price not bad. works great. I have installed better reducing valves but at a higher cost. These valves have to be replaced or rebuilt every three to four years when the potable water contains excessive minerals and sand. I recommend the model 600 which can be cleaned of heavy deposits more easily over this valve, however the supply/service line size may be an issue with the 600.
Date published: 2013-02-24
Rated 5 out of 5 by from It is a quality piece that is precision machined and easy to install. Since it has double union c... It is a quality piece that is precision machined and easy to install. Since it has double union connections with rubber neoprene gasket washers to make a watertight installation, it was painless as painless can be for this type of work.
Date published: 2016-11-09
Rated 5 out of 5 by from Perfect Transaction and product All good. Quick delivery. Easy install. Works well.
Date published: 2016-05-31
Rated 2 out of 5 by from Cheap Plastic inside!!! I bought this unit in 2008 and after two years after installment it started to act up my water would gush from the faucet then slow down to normal and really get a lot of pressure built up in the lines I was afraid of bursting a water line and flooding my home. so I went to a plumber and bought a good one it cost 2$$.$$ and a bit more but it is not plastic inside and will not wear out so fast as this one did to have someone put one in it is 5$$.$$ so it is worth the expense the first time around, I am saying the unit is not a good one. This is sleepersteve
Date published: 2013-07-16
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