The Comet 8102.0551.00 Unloader Valve Pressure Block is a compact 2.00" W x 2.00" D x 1.50" H solid machined aluminum mounting block designed for remote installation of pressure washer unloader valves.
By moving the unloader valve away from the pump head, this durable block absorbs mechanical vibration and isolates high-pressure stress, significantly extending component lifespan. Built to handle up to 4,000 PSI, it features two standard 3/8" FPT ports for flexible fluid routing and pre-drilled 5/16" x 18 threaded mounting holes for fast frame or skid integration.
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Compact Footprint (2" x 2" x 1.5"): Designed with a space-saving profile to easily fit tight pressure washer frames, skid units, and custom plumbing layouts.
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Vibration Isolation: Enables remote mounting of unloader valves away from direct pump vibration, protecting sensitive valve internals from premature wear.
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Solid Machined Aluminum: Precision-machined block provides high tensile strength and corrosion resistance while keeping total weight down to just 0.55 lbs.
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Dual 3/8" FPT Plumbing Ports: Standardized female pipe threads make it effortless to connect inlet, outlet, and bypass pressure lines.
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Integrated Mounting Setup: Pre-tapped 5/16"-18 holes allow direct bolt-down securing to equipment bases or mounting plates.
| Specification | Details |
| Brand | Comet |
| Part Number | 8102.0551.00 |
| Product Type | Unloader Blocks |
| Dimensions | 2.00" L x 2.00" W x 1.50" H |
| Material | Solid Machined Aluminum |
| Maximum Operating Pressure | 4,000 PSI |
| Inlet / Outlet Ports | (2x) 3/8" FPT (Female Thread) |
| Mounting Thread Pattern | 5/16" 18 Threaded Holes |
| Application | Remote Unloader Valve Mounting / Pressure Block Junction |
