Maxitrol 325-3 (1/2")


Regulator, Gas Pressure

325-3 (1/2") 51281
Average Rating: 5
Read Reviews (2) Write a Review
$31.23 + 3 Business Day Shipping $7.15
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ItemGas Pressure Regulator
TypeLever-Acting Gas
Pipe Size1/2"
Max. Inlet Pressure (PSI)2 For LP Gas, 5 For Natural Gas
Outlet Pressure Range (In. WC)4 to 12
Inlet Emergency Exposure Limits (PSI)65
Cu.-Ft./Hr. @ 0.3 (In. WC) Pressure Drop30
Cu.-Ft./Hr. @ 1.0 (In. WC) Pressure Drop55
Cu.-Ft./Hr. @ 2.0 (In. WC) Pressure Drop78
Cu.-Ft./Hr. @ 3.0 (In. WC) Pressure Drop95
Cu.-Ft./Hr. @ 4.0 (In. WC) Pressure Drop110
Cu.-Ft./Hr. @ 7.0 (In. WC) Pressure Drop145
Cu.-Ft./Hr. @ 1/2 PSI Pressure Drop204
Cu.-Ft./Hr. @ 3/4 PSI Pressure Drop250
Cu.-Ft./Hr. @ 1 PSI Pressure Drop289
Ambient Temp. Limits (F)-40 To 205
Max. Load100,000 Btu/hr
Capacity150,000 Btu/hr
Venting1/8" NPT
Mounting PositionHorizontal Upright
Includes Vent Limiter
Standards CSA 6.3, ANSI Z21.18 Designed Certified
Weight 0.750000


Gas Pressure Regulator, Lever-Acting Gas, Pipe Size 1/2 In, FNPT Connection, Max Inlet Pressure 2 For LP Gas, 5 For Natural Gas PSI, Outlet Pressure Range 4-12 In WC, Inlet Emergency Exposure Limits 65 PSI, Ambient Temp Limits -40 To 205 F, Max Load 100, 000 Btu/hr, Capacity 150, 000 Btu/hr, Horizontal Upright Mounting Position, Venting 1/8 In NPT, Cu-Ft/Hr @ 03 30 In WC) Pressure Drop, Includes Vent Limiter, Standards CSA 6.3, ANSI Z21.18 Designed Certified

  • Note: These regulators provide no downstream over-pressure protection in the event of failure. They should not be used if the appliance controls downstream will not safely contain gas when exposed to supply pressure.

Lever-Acting Gas
  • Reduce intermediate pressure to a level usable by standard low-pressure controls. 4E224 and 4E225 include automatic vent limiter.
  • Gas Pressure Regulators
  • Made for natural, manufactured, mixed, LP, or LP gas-air mixtures. Corrosion-resistant aluminum alloy housings. External venting must be in accordance with government and plumbing codes and regulations. NPT connections.
  • Ambient temp. range: -40 to 205 F (3UP35 and 4E226 are 32 to 225 F)

Customer Reviews

Average Product Rating: 5
based on 2 reviews

Gas Valve

Wednesday, March 06, 2013

Website easy to maneuver, exactly as described, and crazy fast shipping. Well done.

Exact replacement.


Submitted by John M

Just good business

Tuesday, November 27, 2012

Very fast shipping, order correct, good business people

Submitted by Bill R
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