Engineered Controls 1/2″ NPT 2nd Stage LP Gas Regulator LV3403B4 450K BTU

Name: Engineered Controls 1/2" NPT 2nd Stage LP Gas Regulator LV3403B4 450K BTU
SKU: LV3403B4
Price: 96.34 USD
Availability: InStock

SKU: LV3403B4

$96.34

In stock

Same-item volume pricing

Quantity	Unit price	Saving
1–4	$96.34	0%
5–9	$91.52	5%
10+	$86.71	10%

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Product Description

REGIONS SUPPLY BUYING GUIDE

Product details & buying advice

For the low-pressure end of a two-stage system, choose a regulator that works with the first-stage supply and delivers the pressure your equipment requires.

Product type	Second-stage LP gas regulators
Part / SKU	LV3403B4
Inlet connection	1/2 in. female NPT
Outlet connection	1/2 in. female NPT
Factory delivery	11 in. w.c. at 10 PSIG inlet
Adjustment range	9–13 in. w.c.
Bonnet vent	Over inlet
Propane vapor capacity	450,000 BTU/hr at 10 PSIG inlet and 9 in. w.c. delivery

What to check before ordering

Check both the pressure arriving from the first stage and the required final outlet setting.
Use the full appliance demand and the manufacturer’s stated rating conditions when comparing capacities.
Have your installer check vent clearance, protection from weather, operating pressure and system tightness.

Service reminder: A matching pipe connection is only one part of the selection. Keep the vent clear, follow the specified vent orientation and piping requirements, and replace any submerged regulator.

Have gas-system installation and service completed by qualified personnel. Use the current instructions for the exact model and the requirements that apply at the installation location.

Product help & manufacturer resources

RegO regulator installation and service guidance

Explore this product guide · Shop this product group · Ask Regions Supply about this part

Overview

Engineered Controls MFG# LV3403B4 Low Pressure Second Stage LP Gas RegulatorThis compact second stage gas regulator is engineered to reduce incoming pressures of 5–20 PSIG down to appliance-level pressure, typically 11″ WC. Ideal for medium commercial installations, multi-cylinder setups, and standard domestic LP gas systems.The LV3403B4 regulator

features

A 1/2″ NPT inlet and outlet for standard pipe connections.A 450,000 BTU/hr capacity, making it a reliable choice for multiple appliance systems.Built-in integral relief valve for safety and compliance.3/4″ FNPT vent port, tapped for 3/8″ FNPT vent piping to prevent freeze blockage.1/8″ FNPT pressure taps on both inlet and outlet sides for diagnostics and pressure checks.A unique over-inlet bonnet vent design to minimize vent freeze.Durable brown finish and compact profile—ideal for tight installations.Factory set at 11″ WC outlet pressure when supplied with 10 PSIG inlet. Complies with NFPA 58 standards.Perfect for pairing with upstream first stage regulators or bulk tank setups. Reliable performance in residential, agricultural, or light commercial propane systems.

Product details

Part / SKU	LV3403B4

Package includes

Engineered Controls 1/2" NPT 2nd Stage LP Gas Regulator LV3403B4 450K BTU

Included components and any stated pack quantity are as described in this listing. Optional accessories shown separately are sold separately unless expressly included above.