Model 70 pressure regulating valve

Model 70 pressure regulating valve DEFAULT

Complete mainstream method Lightly Used Wilkins Pressure Regulating Valve Model 70 3/4” PSI There are bulk purchase privileges

Complete mainstream method Lightly Used Wilkins Pressure Regulating Valve Model 70 3/4” PSI There are bulk purchase privileges

one group of colors in the color wheel is associated with the sun, warmth and fire. these colors are called warm colors since they evoke warm feelings in people. yellow, red, orange and different shades of these colors are warm colors. the wavelengths of these colors are long and these are easily noticed, lively colors.

another group of colors in the color wheel, on the other hand, is considered to consist of cool colors. these colors leave a cold effect on people. green, blue, purple and shades of these colors are cool colors.

colors can cause mood changes, the feeling of warmth or coolness, altered perception of largeness or smallness in terms of volume as well as differences in perception of distances.

warm colors are at the forefront.
these are the colors of preference for calm, timid children of low energy.
(torrice & logrippo, )
warm colors are preferred by preschool children.
(engelbrecht, )

cool colors on the other hand are usually in the background.
these are appropriate for use where highly energetic, hyperactive children are concerned.
(torrice & logrippo, )
these colors are preferred by students in secondary education and high school.
(engelbrecht, )


How to Adjust the PSI on a Water Pressure Reducing Valve

If you didn't have a pressure-reducing valve installed between the municipal water system and your house, the water pressure would break all your water lines and appliances. The pressure in a municipal system can be as much as psi to service fire hydrants and high-rise buildings, but the pressure in a typical residence is usually around 50 psi. The step-down regulator near your water meter or just outside the house is usually factory-set. If you need to adjust it higher or lower, the procedure is simple, but you may need a water pressure meter if there isn't one there already.

  1. Locate an outdoor or laundry faucet with a threaded spout and screw on a water pressure meter. You can buy the meter at a hardware store or rent one from a rental outlet. Turn on the water, note the pressure and leave the water turned on. If there's already a meter installed on the water line after the pressure-reducing valve, you can skip this step.

  2. Loosen the lock nut on the pressure reducing valve with a wrench and back it off by unscrewing it.

  3. Fit a socket wrench over the adjustment nut on the top of the valve. Turn the nut counterclockwise to reduce the pressure downstream from the valve and clockwise to increase it. Have someone watch the meter, if you can't see it yourself, and stop adjusting when the pressure reaches the desired value.

  4. Screw the lock nut back onto the valve and tighten it with a wrench. Turn off the faucet to which you attached the pressure meter and unscrew the meter. A little water will spray out when you do this.

  5. Things You Will Need

    • Water pressure meter

    • Wrench

    • Socket wrench


    If you experience a sudden reduction in water pressure, it's a good idea to check with the water company. There may be a temporary problem with the municipal system, and if you adjust your valve and the municipal problem is corrected, your pressure will be too high.


    Don't set the pressure much greater than 60 psi. Not only does high pressure cause leaks, it wastes water and can actually be dangerous.

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Knowing how to adjust a pressure reducing valve is an important part of any DIYer’s toolkit. In this article, we’ll start from scratch and walk you through the process. We’ll also tell you everything you need to know about pressure reducing valves and why you might need to adjust yours in the first place.

How Do Pressure Reducing Valves Work?

As their name would suggest, pressure reducing valves control the flow of water into your home. Without a pressure reducing valve, this water would travel through your plumbing at a rate unsuitable for residential use.

Water heaters in Phoenix are typically capable of handling pressure lower than 80 psi. City officials, meanwhile, consider pressure ranging from 40 to psi acceptable. If the pressure of the water arriving at your home reaches the upper end of that range, it will damage not only your water heater but other appliances and pipes as well.

That’s where a residential water pressure regulator (another name for ‘pressure reducing valve’) comes in.

Okay But How Do Pressure Reducing Valves Work?

Alright, if you’re unsatisfied with the general explanation we’ve provided above, here’s a more technical one.

A pressure reducing valve is typically close to your water shutoff valve. You’ll know you’re looking at the valve because it will have a gauge nearby.

Inside the valve, there are a spring and diaphragm. These two elements interact with incoming water pressure, either contracting or enlarging the hole that your water ultimately passes through.

When the water enters the valve at a pressure greater than what it’s been set to allow, the diaphragm and spring will contract and reduce the flow. The reverse is also true, however. If the water enters the valve at too low a pressure, the spring and diaphragm will expand and allow the water to exit through a larger hole.

Your pressure reducing valve setting will determine what it considers acceptable at both the upper and lower limits of its range.

If this doesn’t make total sense to you, don’t worry. The exact mechanics and physics of the process confuse even some experienced plumbers. What everyone does know is that the process works.

How To Adjust Your Pressure Reducing Valve

You’ll need a wrench of the right size to perform the adjustment.

Now that you have a good understanding of how pressure reducing valves work, you should have an idea of what’s happening when you do the adjustments.

First Things First: Should You Adjust The Pressure?

If you’re experiencing increased or decreased water pressure due to an abnormality in your municipal water supply’s function, adjusting the valve may throw things out of wack when the system returns to normal.

For this reason, you’d be wise to contact your water department to see if the issue lies with them. If not, it’s possible that your valve has gone out of wack somehow and requires adjustment.

Also, note that adjusting your pressure reducing valve setting without fully understanding what you’re doing can lead to issues. Setting the pressure too high wastes water and can be harmful to your appliances. In extreme cases, your water heater can explode. Appliances like water softeners can also face damage.

In other words, if you’re uncertain about what you’re doing, contact professionals like our technicians at American Home Water and Air.

Step #1: Locate The Valve

A pressure reducing valve usually resembles a bell or dome. As mentioned earlier, you’ll usually see it alongside a gauge. It may be built right into your water meter. In most cases, however, you’ll find the valve in the form of a separate device that lies after the meter within your home’s water supply chain.

Step #3: Identify The Adjustment Method

Many valves have a nut, screw, or knob attached to them that allow you to do the actual adjusting. Turning the screw or knob clockwise typically increases the water pressure while turning it counter-clockwise lowers the pressure.

This may be counterintuitive since it’s the opposite of how faucets work, so make sure you know what direction to turn in order to get your desired pressure.

Step #4: Use A Water Gauge To Test Your Pressure

Before you make any adjustments to your pressure reducing valve, you need to understand the existing circumstances. While you may know your pressure is too high due to symptoms such as dripping faucets, you want to get an exact reading on the pressure.

There are a few places you can attach the gauge to get a good reading. As long as the fixture is downstream of the valve, it’s doesn’t particularly matter. Many people attach the gauge to a water heater drain valve or simply a faucet.

Step #5: Understand Whether You Have A Closed Or Open System

Simply put, an open water heater system allows excess water pressure to make its way back into your cold water supply line and eventually out into the municipal water supply. A closed system does not allow excess pressure to make it back out into the municipal supply.

When thermal expansion occurs, this can be dangerous. To avoid this danger, you will have to match the pressure of your regulator to the pressure of your expansion tank.

It’s not rocket science &#; but it’s good to know before you start making adjustments.

Step #6: Adjust Your Pressure Reducing Valve

Most valves have a locking nut. Once you unscrew this nut, you will be able to turn the adjustment screw, knob, or bolt. Adjust it until the pressure shown on your gauge reaches the desired level. For most residential purposes, that means a pressure below 80 psi.

Do not make huge adjustments at once. Make no more than a quarter turn each time before taking a look at the gauge to see what effect you’re having.

Also, make note of the adjustments you make so that you can revert them if you happen to go too far.

Step #7: If Necessary, Adjust Your Thermal Expansion Tank Pressure

If you have a closed water heater system, you will also need to adjust the pressure on your thermal expansion tank. To do this properly, you’ll need an air pressure gauge to test the existing pressure of your expansion tank. Attach the valve directly to the air inlet valve on the tank.

Once you’ve determined the pressure, use a hand pump to raise it to a pressure equal that of your home’s water pressure. Don’t use an air compressor; doing so risks damage.

Step #8: Detach The Water Gauge and Lock The Adjustment Nut

Make sure you lock the adjustment nut on your pressure reducing valve. This will prevent the screw from turning easily, which would undo your adjustments.

When To Replace Your Pressure Reducing Valve

It’s recommended that you check your water pressure at least once per year to ensure it’s at the desired level. As with most mechanical devices, however, your pressure reducing valve can begin to function improperly with time.

You’ll know this is the case when adjustments to your valve do not result in changes to your water pressure. The pressure may be consistently high regardless of your efforts and you’ll likely notice issues such as water hammers and dripping faucets.

If you think you need to replace your pressure reducing valve, you’d be smart to contact a professional to do the job. It can be a confusing process for inexperienced DIYers as it requires soldering, plumbing work, and potentially the installation of other equipment to mitigate any issues you come across.

Once the valve has been installed professionally, adjusting it on your own is fairly straightforward presuming you have a solid understanding of the steps outlined above.


A pressure reducing valve is an important part of your residential water system. It allows you to adjust the pressure of water arriving in your home to a level that is suitable for your appliances.

Before you go about adjusting the pressure, contact your municipality to ensure the abnormal pressure is not just a temporary issue with their systems.

If you conclude that the issue lies with your valve, adjust it using the steps above.

If you’re unsure of what you’re doing and live in the Phoenix area, give us a call at American Home Water and Air. We’ve been repairing residential water and HVAC systems for more than 30 years and we’d be delighted to serve you.

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70 pressure regulating valve model

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