Dicor LP-R528B Automatic Changeover LP Regulator Wall Mount

Manage two propane tanks automatically in larger RV propane systems with the Dicor LP-R528B Automatic Changeover LP Gas Regulator. This high-capacity 450,000 BTU/hr wall-mount changeover regulator automatically switches between two propane cylinders — drawing from the primary tank until it's empty, then seamlessly switching to the reserve tank without interrupting your propane supply. The serious-capacity changeover regulator for big RVs, fifth wheels, and toy haulers where total propane demand exceeds what smaller changeover regulators can handle.

What an Automatic Changeover Regulator Does

Most RVs with two propane tanks need a changeover regulator — and the automatic version is the upgrade most owners genuinely appreciate:

• Designate primary and reserve tanks using the regulator's selector
• The regulator draws propane from the primary tank as long as it has supply
• When the primary tank empties, the regulator automatically switches to the reserve tank — no interruption to propane flow, no appliances shutting off
• An indicator shows when changeover has happened, so you know to refill the empty tank before the reserve runs out

That means you're never caught without propane unexpectedly — the reserve tank carries you while you arrange to refill the empty one. Particularly valuable for full-time RVers, winter campers running heat continuously, and anyone where running out of propane mid-trip would be more than a minor inconvenience.

450,000 BTU/hr — High-Capacity Changeover

The standout spec: 450,000 BTU/hr capacity. That's roughly 3× the capacity of standard 160,000 BTU/hr RV changeover regulators, making the LP-R528B the right choice for:

• Larger fifth wheels and toy haulers with multiple high-draw appliances
• RVs with multiple furnaces running simultaneously in cold weather
• Setups with high total propane demand from full-size residential appliances
• Custom builds where future expansion of propane appliances is planned

If your RV has more modest propane demand and the standard 160K BTU/hr capacity is sufficient, the Suburban LP-R924 changeover regulator is the standard-capacity option.

Connection Specs

• Inlet: 1/4" female inverted flare (both sides, for connection to propane pigtail hoses from both cylinders)
• Outlet: 1/2" female threads (for connection to downstream RV LP gas piping)
• Stage: Single stage

Built-In Shut-Off Valve

The integrated shut-off valve lets you manually shut off propane supply at the regulator for service, transport, or storage — meaning you don't have to close the valves at both cylinders every time you need to service downstream components.

⚠️ Regulator Only — Hoses Not Included

This listing is for the LP-R528B regulator only. Pigtail hoses, cylinder fittings, mounting hardware, propane tanks, and downstream LP piping components are not included. Before ordering, verify:

• Your RV needs an automatic changeover regulator (vs single-tank setup)
• The inlet connections match your existing pigtail hoses (1/4" female inverted flare)
• The outlet connection matches your RV's downstream LP piping (1/2" female threads)
• The 450K BTU/hr capacity matches or exceeds your combined propane appliance load
• This single-stage regulator is the correct stage for your RV's propane system design

Common RV Applications

The LP-R528B is used in RV propane systems with two LP cylinders where automatic cylinder changeover is desired. It supports propane supply to RV appliances including:

• Furnaces
• Water heaters
• Refrigerators
• Cooktops and ranges
• Ovens
• Other LP gas appliances

⚠️ Professional Installation Required

Propane regulator installation involves LP gas connections and leak testing. Incorrect installation can cause gas leaks, fire, explosion, appliance malfunction, or carbon monoxide hazards.

Installation should be performed by a qualified RV LP gas technician. Always leak-test all fittings after installation and verify proper regulator output pressure before operating RV appliances.

RV Approved

The LP-R528B is listed as RV approved — designed and rated specifically for use in RV propane systems.

Considering Other Suburban/Dicor Regulators?

We carry the full Suburban/Dicor propane regulator line — pick by application:

• Suburban LP-R924 — single-stage automatic changeover regulator, 160K BTU/hr (standard capacity for smaller RVs)
• Suburban LP-R524HP — 2-stage horizontal appliance regulator with POL inlet
• Suburban LP-R524H — 2-stage horizontal appliance regulator with NPT inlet
• Suburban LP-R524V — 2-stage vertical appliance regulator with NPT inlet

Key Features

• Automatic changeover LP gas regulator for dual-cylinder RV propane systems
• 450,000 BTU/hr capacity — ~3× the capacity of standard RV changeover regulators
• Automatic switching between primary and reserve cylinders
• Single-stage design
• 1/4" female inverted flare inlets (for compatible pigtail hoses)
• 1/2" female threaded outlet
• Built-in shut-off valve
• Wall-mount design
• RV approved
• Backed by a 1-year manufacturer warranty

What's Included

• (1) Dicor LP-R528B automatic changeover LP gas regulator

Sold Separately

• Propane pigtail hoses (cylinders to regulator)
• Mounting hardware/bracket (if required for your installation)
• Downstream fittings or adapters (if required)
• LP gas leak test supplies
• Propane cylinders and cylinder mounting components

Specifications

• Brand: Dicor (AirXcel) — also distributed by Suburban Manufacturing
• Part Number: LP-R528B
• Type: Automatic Changeover LP Gas Regulator (wall mount)
• Application: Dual-cylinder RV propane systems
• Fuel Type: LP gas / propane
• BTU Capacity: 450,000 BTU/hr
• Number of Stages: Single stage
• Inlet Size: 1/4"
• Inlet Connection: Female inverted flare
• Outlet Size: 1/2"
• Outlet Connection: Female threads
• Shut-Off Valve: Yes
• Hoses Included: No (sold separately)
• RV Approved: Yes
• Warranty: 1-year manufacturer warranty