I turned on the main water to help flush out the main body of the regulator. To keep from making a mess, I used a piece of plastic to direct the water into a bucket. After rinsing out the regulator, I used an old t-shirt to clean out the inside of the regulator.

How to adjustpressure regulator

I used a water pressure gauge to help trouble shoot the main problem and to make sure I adjusted the rebuilt regulator to the right pressure.

Adjusting water pressureswitch

Rebuilding a water pressure regulator valve is easier than replacing one. I will show you how I rebuilt my water pressure regulator.

The 25AUB, is a bronze body water pressure regulator The N35B is a water pressure reducing valve both are set at the factory for 50 lbs. You really have to know your needs before making a choice. Best Wishes

The first sign that something was wrong was there seamed to be a loss of water pressure in my house. Taking a shower, seamed like there was hardly any pressure. I hooked up the water pressure gauge and found that the pressure was fine. Running the water, into a bucket, made it easy to see that the flow of water was slower than it should be. I asked a neighbor if he was experiencing any loss in pressure or flow, since we are on the same water supply. He said that his water pressure and flow was fine. That removed the possibility that the problem may have been the water supply pressure or flow. This led me to believe that there was something wrong with my water pressure regulator.

I thought I was going to have to use one pipe wrench to hold the main body of the regulator while I used the other pipe wrench to turn the top piece of the regulator, but the pipes going into and out of the regulator seamed sturdy enough.

How to adjustwater pressureatwatermeter

Water pressure regulatoradjustment screw

I think I understand, thanks! One last question. Do you think it's worth for me to be able to clean out the strainer? I'm on city water.

Sorry, I guess I'm really confused. The discription for the N35B & 25AUB both say they are "Water Pressure Reducing Valves" and "consists of a bronze body construction". What is the difference between a water pressure regulator and a water pressure reducing valve??? I want to reduce the pressure comining into my house which is now at 100PSI.

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How to adjustwater pressure regulatoron a well

Can someone tell me the advantages between the 25AUB-Z3 and the N35B Watts pressure reducing valves? Which one should I get? The 25AUB-Z3 valve seems to be about 15 bucks more expensive. [www.wattsregulator.com]

Before taking apart plumbing, it is important to shut off the main water supply and relieve the pressure in the pipes. My main shut off valve is right beside the water pressure regulator. After closing the main water valve, I relieved the pressure, in the pipes, by opening a water valve and letting the water run until the pressure was relieved.

I get it, the size range for the 25AUB-Z3 is 1/2" to 2" and for the N35B it's 1/2" to 1". Thanks! Your answer makes alot of sense.

How to adjustwater pressure regulatorwithout gauge

The top o-ring, of the basket, needs to be lubricated before being inserted. The rebuild kit came with a small packet of silicone lube. After inserting the basket there is a washer that goes on top of the basket. Then the spring, spring top piece, and regulator top piece screw on top. This is easier if you have the pressure screw turned almost all the way out so there is hardly any pressure on the spring.

I should have gotten a large adjustable wrench for the top piece of the regulator, but instead used channel lock plyers.

Water pressure regulatoradjustment clockwise

Turn the water back on by opening the main water valve. Check the water pressure with the gauge. Slowly tighten the water pressure regulator adjustment screw clockwise until you have your desired water pressure. I found out the correct pressure should be between 70 and 85 psi. It may be different for you depending on your house and where you live.

Once reaching the desired pressure, I let the water run for a bit and then double checked the pressure. I also checked to make sure there were no water leaks at the pressure regulator valve.

25AUB-Z3 / N35B Both units - are bronze, have removable strainer, seat, and have the bypass feature. The design difference allows the 25AUB-Z3 to have a higher flow rate than the N35B. Properly sized, either unit should work fine for your residence. Even though these units have a bypass you should still have an expansion tank on your hot water distribution system.

These are the same type of device; different bells and whistles. The N35B has an bypass feature and 'cartridge' type seat assembly for easy repair. The other model has a strainer which can be easily accessed for periodic cleaning. Both are widely seen in residential use, as are the Wilkins model 70 and model 600.

I used the 9/16" wrench to loosen the jam nut and then remove the pressure adjustment screw. I started loosening the top piece of the regulator by using a pipe wrench. I found that it was easier to use channel lock plyers. Carefully remove the top piece because there is a spring, a washer, and metal piece that will fall out. I found that the main spring was broken and this was probably the main reason that my water flow had decreased. I then used the channel lock plyers to remove the basket from the regulator main body.