The bracket beneath an RV propane regulator and the direction of its vent are easy to overlook when comparing replacement parts. Marshall Excelsior makes separate Z-style and L-style mounting brackets for compatible regulator families; a matching regulator model number does not guarantee that the existing bracket shape will match. This illustrated guide shows which parts do what and links to the exact catalog listings.
Identify the regulator, support bracket and vent separately
The regulator controls gas pressure; the bracket carries its mounting load. The vent opening is part of the regulator housing and requires the clearances and direction specified for the exact model.
Gas connections
Mounting and environment
MEGR900 Z-bracket versus MEGRRVB L-bracket
MEGR900 and MEGR900P
Marshall Excelsior identifies the MEGR900 as a Z-style steel mounting bracket. Its separately listed packaged variant is MEGR900P. Compare the physical offset, holes and fastening location with the original support.
MEGRRVB and MEGRRVBP
MEGRRVB is the L-style steel bracket, also sold under its packaged variant MEGRRVBP. It serves as a support option for specified regulator models but is not a shape-for-shape replacement for the Z-style bracket.
Both families are listed for compatible Marshall Excelsior MEGR-253-series applications. Confirm the exact casting and installation arrangement rather than assuming that bracket model numbers describe the same geometry.
Compare parts by their role
| Part number | Role | What to identify |
|---|---|---|
| MEGR900 / MEGR900P | Z-style steel support bracket | Offset, attachment points and required mounting clearance |
| MEGRRVB / MEGRRVBP | L-style steel support bracket | Different physical profile and matching regulator support |
| MEGR-253 / MEGR-253P | Standard automatic changeover regulator | Complete model number, ports, regulator body, indicator and approved mounting |
| MEGR-253H | High-capacity automatic changeover regulator | Capacity and installation requirements; not simply a bracket variation |
| MEGR-253P-PT18 | Packaged regulator and pigtail option | Exact kit contents before assuming any bracket is included |
When replacing a corroded or damaged support, review the product image of the actual bracket and check the mounting arrangement. Regulator service, installation and testing should be performed by qualified propane personnel.
Compare exact product photographs and available parts
These existing UsedRVParts listings include new replacement items as well as parts-reference options. Check each listing for its condition, current stock and applicable model. Viewing and pickup where available are by appointment in Kelowna.
Continue to the regulator and appliance parts drawings
Choosing the correct support is only one step in matching a regulator. The related guides identify the two-cylinder inlet arrangement, regulator models, hose fittings and model-specific appliance components.
Factory mounting reference
Marshall Excelsior's parts catalog identifies the MEGR900 and MEGRRVB bracket profiles, and its MEGR-253 regulator information covers the regulator family. Follow the full installation and venting instructions supplied with the exact part rather than treating this identification guide as a mounting template.