The complete Integrated Relief and Control (IRC) assembly for RVs equipped with three hydraulic slide-out rooms. This OEM-matched kit from Lippert supplies the manifold and every fitting needed to restore or replace your triple slide hydraulic circuit -- no hunting for individual components, no mismatched adapters.
Lippert's hydraulic slide-out systems rely on a precisely controlled fluid circuit to extend and retract each slide room independently and in sequence. The IRC (Integrated Relief and Control) manifold is the heart of that circuit, managing pressure and flow to each room's hydraulic cylinder. When seals fail, fittings leak, or the manifold itself cracks, this assembly gives you a direct OEM replacement with every piece pre-matched.
Part number 127245 is the complete kit for triple-room hydraulic slide configurations. It includes the 3-Room Standard MIRC manifold (Lippert 134799) along with the four fittings required to connect it to the hydraulic lines serving all three slide rooms. All components are sourced to Lippert's hydraulic specifications for thread pitch, port sizing, and pressure rating.
The Lippert 134799 Standard MIRC manifold manages hydraulic flow and pressure relief across all three slide rooms in a single, compact body.
Includes three straight fittings, one long straight fitting, and one 90-deg swivel elbow -- every connection point the manifold requires, nothing extra to source.
Each component carries its own Lippert part number, so if a single fitting ever needs replacement down the road, you can order it individually.
Fittings are sized for standard 1/4-inch hydraulic line (04 series JIC/SAE), matching the hose diameters used in Lippert's hydraulic slide-out plumbing.
The MIRC (Manifold Integrated Relief Control) is a multi-port hydraulic block that routes pressurized fluid from the pump to each slide cylinder and back to the reservoir. Built-in relief valves protect each slide circuit from over-pressure damage. When the manifold body cracks or its internal seals deteriorate, slide rooms may creep, fail to extend fully, or retract unevenly. Replacing the entire manifold assembly -- rather than attempting to rebuild individual ports -- is the standard repair approach recommended by Lippert-certified service centers.
Every component in the 127245 assembly is identified by its own Lippert part number, making future individual replacement straightforward:
Replacing the IRC assembly is a hydraulic system service job. The coach should be on level ground with all slide rooms fully retracted before beginning. The hydraulic reservoir must be depressurized and the system drained to the manifold level before removing fittings. Lippert recommends using a drip pan and lint-free rags to capture fluid during manifold removal.