Suburban Horizontal Propane Regulator With Shut Off Valve, 1/4" Female NPT x 3/8" Female NPT, 160K BTU

Regulate propane supply to your RV's appliances with the Suburban LP-R524H 2-Stage Horizontal Propane Regulator. This 160,000 BTU/hr regulator with horizontal vent and built-in shut-off valve features 1/4" female NPT inlet and 3/8" female NPT outlet — the right choice for hardpipe propane installations that use NPT-threaded connections on both sides rather than POL-type tank fittings.

Two-Stage Regulation for Stable Appliance Performance

Why two-stage matters: RV propane appliances are designed to operate at a precise, low pressure (11" water column). A two-stage regulator delivers that stability across changing tank conditions — full tank vs nearly empty, cold weather vs hot, low demand vs running multiple appliances at once. Single-stage regulators struggle to maintain steady output across those changes; two-stage handles them cleanly, which means your furnace lights reliably, your stove flames stay consistent, and your appliances last longer.

1/4" Female NPT Inlet — For Hardpipe Installations

The LP-R524H differs from its sibling LP-R524HP in one key spec: the inlet is 1/4" female NPT rather than POL. That makes the LP-R524H the right choice when:

Considering Other Suburban/Dicor Regulators?

We carry the full Suburban/Dicor regulator line — pick by application and mounting orientation:

• Suburban LP-R524V — same 2-stage NPT regulator with vertical vent (for vertical-mount installations)
• Suburban LP-R524HP — 2-stage horizontal regulator with POL inlet (for direct-tank-mount installations)
• Suburban LP-R924 — single-stage automatic changeover regulator, 160K BTU/hr (standard capacity)
• Dicor LP-R528B — high-capacity automatic changeover regulator, 450K BTU/hr

• Your existing propane plumbing uses NPT-threaded hardpipe connections rather than POL-style tank fittings
• You're replacing an existing NPT-inlet regulator
• Your installation is plumbed with NPT fittings throughout

160,000 BTU/hr — Built for Demanding RV Loads

The 160,000 BTU/hr capacity is sized for serious RV propane demand — comfortably handling multiple high-draw appliances running simultaneously (furnace + water heater + range + refrigerator). That's the right capacity for larger RVs, fifth wheels, and any rig where you don't want the regulator to be the bottleneck during peak winter heating loads.

Built-In Safety: Shut-Off Valve + Horizontal Vent

• Shut-off valve — lets you manually shut off propane supply at the regulator for service, transport, or storage
• Horizontal vent — designed for horizontal-mount installations

Horizontal Mounting Configuration

This is the horizontal-mount version of the regulator — designed for installations where the regulator mounts horizontally rather than vertically. Confirm your installation's mounting orientation before ordering.

Connection Specs

• Inlet: 1/4" female NPT
• Outlet: 3/8" female NPT
• Outlet pressure: 11" water column (WC)

⚠️ Professional Installation Recommended

Propane regulators should be installed and serviced by a qualified service technician to ensure proper leak-free operation. Improperly installed propane hardware is a fire and explosion risk. Always pressure-test connections after installation.

ISO 9001:2015 Certified

The LP-R524H is manufactured under ISO 9001:2015 quality certification — Suburban's commitment to consistent quality standards in propane safety equipment.

Key Features

• 2-stage horizontal propane regulator
• 160,000 BTU/hr capacity — handles demanding multi-appliance loads
• 11" water column outlet pressure
• 1/4" female NPT inlet (NPT hardpipe installations)
• 3/8" female NPT outlet
• Horizontal vent
• Built-in shut-off valve for service/transport/storage
• ISO 9001:2015 certified
• Backed by a limited 1-year manufacturer warranty

Specifications

• Brand: Suburban
• Part Number: LP-R524H
• Type: 2-Stage Horizontal Propane Regulator
• Capacity: 160,000 BTU/hr
• Inlet Size: 1/4" female NPT
• Outlet Size: 3/8" female NPT
• Outlet Pressure: 11" water column
• Mounting: Horizontal
• Vent: Horizontal
• Shut-Off Valve: Yes
• Certifications: ISO 9001:2015
• Weight: 5 lbs
• Warranty: Limited 1-year manufacturer warranty