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Water Pressure Regulators

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Water Pressure Regulating Valves
(Reducing Pressure Valves)
Pressure reducing valve Features:
  • Top quality brass with pressure adjustment, union, and strainer.
  • Factory set at 45psi (adjustable)
  • With IPS connections (female pipe threads)
  • Spring range of 10-70psi
  • Your choice - 1/2" up to 2" union inlet size
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
1/2" $49.83
3/4" $46.67
1" $89.41
1 1/4" $159.73
1 1/2" $249.49
2" $319.23

We recommend installing a pressure regulator whenever your water pressure is over 60psi. Note: most plumbing codes require the use of a regulating valve when pressures go over 80psi.
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EB86U Specifications
Range Adjustment 10 - 70psi (45psi standard)
EB86U Dimensions
Valve Size A B C Shipping Weight (lbs)
1/2" 3-29/32" 3-31/32" 1-13/32" 1.75
3/4" 4-21/32" 3-13/32" 1-9/16" 2.25
1" 4-13/32" 4-3/8" 1-13/32" 3.00
1-1/4" 5-5/8" 6-7/8" 2" 7.25
1-1/2" 7" 8-1/2" 2-13/16" 13.00
2" 8-1/8" 10-11/16" 2-5/8" 20.75

Things you need to know:
  • Your inlet pressure (P1)
  • Your desired pressure drop (P2)
  • Required flow rate in gallons per minute (GPM)
  1. Take the difference of your inlet pressure (P1) and your desired pressure drop (P2) (P1 - P2)
  2. In the first column find your desired pressure drop (P2)
  3. Scroll to the right to locate your desired GPM
    • If the MAX GPM is not in that row then jump to the next highest valve size
  4. The far right column is the appropriate valve size
Desired
Pressure Drop (P2)		 Inlet Pressure - Pressure Drop (P1 - P2) Valve
Size
0 - 10 PSI 11 - 25 PSI 26 - 50 PSI 51 - 100+ PSI
Maximum Required Flow Rate (GPM)
0 - 5 PSI 3 GPM 4 GPM 4-1/2 GPM 5-1/2 GPM = 1/2"
6 - 10 PSI 6 GPM 8 GPM 10 GPM 11 GPM
11 - 15 PSI 8 GPM 11 GPM 13-1/2 GPM 15 GPM
16 - 20 PSI 9-1/2 GPM 13 GPM 15-1/2 GPM 17 GPM
0 - 5 PSI 4 GPM 6-1/2 GPM 7-1/2 GPM 9 GPM = 3/4"
6 - 10 PSI 8-1/2 GPM 12-1/2 GPM 16 GPM 17 GPM
11 - 15 PSI 12-1/2 GPM 17-1/2 GPM 22 GPM 24 GPM
16 - 20 PSI 15-1/2 GPM 21 GPM 26 GPM 28 GPM
0 - 5 PSI 7 GPM 10 GPM 11 GPM 12 GPM = 1"
6 - 10 PSI 15 GPM 20-1/2 GPM 25-1/2 GPM 27-1/2 GPM
11 - 15 PSI 22 GPM 29 GPM 35-1/2 GPM 37-1/2 GPM
16 - 20 PSI 28 GPM 35 GPM 41-1/2 GPM 44-1/2 GPM
0 - 5 PSI 8-1/2 GPM 11 GPM 12 GPM 14 GPM = 1-1/4"
6 - 10 PSI 20 GPM 27 GPM 33 GPM 36 GPM
11 - 15 PSI 30 GPM 41 GPM 51 GPM 55 GPM
16 - 20 PSI 40 GPM 53 GPM 65 GPM 70 GPM
0 - 5 PSI 10-1/2 GPM 14 GPM 16 GPM 18 GPM = 1-1/2"
6 - 10 PSI 27 GPM 38 GPM 48 GPM 52 GPM
11 - 15 PSI 39 GPM 55 GPM 70 GPM 76 GPM
16 - 20 PSI 50 GPM 72 GPM 92 GPM 100 GPM
0 - 5 PSI 16 GPM 20 GPM 23 GPM 25 GPM = 2"
6 - 10 PSI 37 GPM 52 GPM 65 GPM 70 GPM
11 - 15 PSI 55 GPM 76 GPM 95 GPM 102 GPM
16 - 20 PSI 70 GPM 97 GPM 120 GPM 130 GPM

  • We recommend water pressure regulators whenever your water pressure is over 60psi
  • Note that most plumbing codes require a water pressure regulator when the water pressures go over 80psi
  • Also, note that if you have or install a pressure regulator in a closed system that we recommend (and most codes require) that you also install an appropriately sized expansion tank

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

A whole world of plumbing
What is hammer "What is water hammer?"
Water Hammer 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.

water pressure regulating valves "Your water pressure regulators are factory set at 45psi. What is the full range?"
Pressure regulators The water pressure regulators that we sell can be adjusted from 10psi up to 70psi. They can handle up to 300psi incoming pressure. We normally recommend keeping the adjustment between 40psi and 55psi for most households. We do not recommend using these regulators for applications less than 20psi. If you need your pressure lower than 20psi then we would recommend contacting a regulator manufacturer for your specific requirements.

water pressure regulating valves "What does 'DIFFERENTIAL PRESSURE P1 - P2 (psi)' mean?"
Pressure regulators 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.

water pressure regulating valves "What does 'P2 Variation (Pressure Drop)' mean?"
Pressure regulators 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"

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

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

water pressure regulating valves "Will these valves also control/limit the gpm flow rate?"
Pressure regulators No, you will need a flow regulator to control the flow rate.

water pressure regulating valves "I need to attach a water pressure regulator to copper pipe. Do you offer copper sweat style pressure regulators?"
Pressure regulators No, but you can use the EB86U with male copper pipe adapters.

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