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Water (H2O) Pressure Regulators


PlumbingSupply.com® is your best source on the Internet for water pressure regulators (aka: "PRV's"), flow regulators and thousands of other plumbing-related products, tools, faucets, sinks and much, much more. If you need it, we've got it!

Water Pressure Regulating Valves (aka: "PRV")
(Reducing Pressure Valves)
The EB-45 Pressure Regulator features a half cartridge design that offers both the performance of a high end cartridge based valve and the price of a traditional regulator. The EB-45 comes factory set at 45 psi. The pressure may be adjusted to 10-70 psi. The EB-45's half cartridge based system allows for easy servicing and installation.
Water Pressure Regulator
may not look exactly as pictured
Features:
  • Top quality brass with pressure adjustment, union, and strainer
  • Factory set at 45psi (adjustable)
  • Standard pressure range: 10-70psi (except 2" model)
  • Standard pressure range: 20-90psi (2" model only)
  • Pressure is adjustable by turning the nut clockwise (increases pressure) and counterclockwise (reduces pressure)
  • Your choice - 1/2" IPS up to 2" IPS union inlet size
  • CA / VT low lead compliant models available - customers in California and Vermont must order specific models in order to meet the requirements of your state
  • 1/2" - 1" models are only available as low lead compliant
  • Click here for specifications

When using a pressure regulator with a water heater, most codes require an expansion tank.

Pressure Reducing (Regulating) Valves
Union Inlet Size (FIPS) Price & Quantity Price & Quantity
(Lead Free)
1/2" -- $79.39
3/4" -- $81.47
1" -- $104.49
1 1/4" $269.94 $314.54
1 1/2" $346.98 $399.42
2" $457.96 $457.65

We recommend whenever your water pressure is over 60psi. Note that most plumbing codes require one when pressures go over 80psi.

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Easy Adjustment Water Pressure Regulating Valves (aka: "PRV")
(Reducing Pressure Valves)
These water pressure regulators feature a convenient orange twist-cap and numerical indicator which helps make pressure adjustment and installation a quick, one-man job. The single-cartridge design has fewer parts for increased reliability, and it can be serviced without having to remove the valve body. The innovative design also eliminates the water whistle or harmonic hum associated with most PRVs, thanks to innovative "micro-fingers" that dissipate noise as water flows across the seat.
Pressure reducing valve
may not look exactly as pictured
Features:
  • Convenient orange twist cap and numerical indicator make adjustment simple
  • Single cartridge design has fewer parts for increased reliability
  • Can be serviced without removing the valve body
  • Innovative design eliminates "water whistle" or "harmonic hum" associated with most PRV's
  • Pressure adjustment range of 20-80PSI
  • The valve closes "against the flow" to reduce the likelihood of water hammer
  • Maximum pressure of 300 psi and up to 180°F
  • Click here for specifications

When using a pressure regulator with a water heater, most codes require an expansion tank.

Pressure Reducing (Regulating) Valves
Union Inlet Size (FIPS) Price & Quantity
(Lead Free)
1/2" $124.36
3/4" $122.76
1" $134.72
1 1/4" $252.79

We recommend whenever your water pressure is over 60psi. Note that most plumbing codes require one when pressures go over 80psi.

- Or -
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Definitions For Terms Used

PSI Pounds Per Square Inch
IPS Iron Pipe Size

to tubular products - to water hammer questions




When using a pressure regulator with a water heater, most codes require an expansion tank.

Frequently Asked Questions

Q. "What does 'DIFFERENTIAL PRESSURE P1 - P2 (psi)' mean?"
A. P1 is the unregulated inlet pressure and P2 is the regulated outlet pressure. The differential between these two numbers will indicate which column to use to determine which valve is right for you.

Q. "What does 'P2 Variation (Pressure Drop)' mean?"
A. P2 pressure Variation (Pressure Drop) is the amount of desired pressure loss for the required gpm (gallons per minute) flow rate required. For example: If the differential pressure is 25 psi, the required flow rate is 15 gpm and maximum pressure drop allowed is 10 psi. The valve size needed using the chart above would be 1".

Q. "What is water hammer?"
A. Water hammer occurs a lot! It is frequently recognized by a "thump" or "bang", usually throughout the water line (if you have copper pipes, you'll tend to hear the noise throughout the house). Water hammer can be caused by a number of things. Many times a loose washer that is jumping around in the faucet or valve causes it. This can be fixed by identifying which valve is the culprit and fixing the washer. Other times it is simply caused by water traveling at a rapid rate and suddenly being shut off. The best solution for this is to increase the size of the water supply thereby slowing down the water (a larger pipe being able to deliver the same amount of water in gallons per minute at a slower speed). If this is not possible, then many times a water hammer arrestor helps.

Q. "I need to attach a water pressure regulator to copper pipe. Do you offer copper sweat style pressure regulators?"
A. No, but you can use the our pressure regulators with male copper pipe adapters.

Q. "My inlet pressure varies, which reading should I use, the higher or lower number?"
A. Always use the lowest number, this will assure you of meeting your minimum pressure and flow rate requirements.

Q. "In the example above you chose a 1" valve when a 3/4" valve almost meets the requirements?"
A. It is best when sizing for optimal performance that, if the requirements fall between an indicated size, you should choose the larger valve.

Q. "Will these valves also control/limit the gpm flow rate?"
A. No, you will need a flow regulator to control the flow rate.



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