AR2260420 Brass Inlet Bolt 1/2" MPT 45mm - 1341

Restore Proper Water Intake The Annovi Reverberi AR2260420 is a brass inlet unloader banjo bolt engineered to secure the water inlet assembly on compatible AR pressure washer and plunger pumps. It serves as the primary water inlet channel, connecting the unloader body to the pump manifold while maintaining a sealed, leak-free path for incoming water. Without a properly functioning inlet bolt, pumps lose prime, develop pressure inconsistencies, and risk internal damage from air ingestion. This genuine-style replacement bolt fits a range of Annovi Reverberi pump models commonly found in cold-water residential pressure washers, light-commercial cleaning systems, and small industrial setups. The AR2260420 replaces part numbers 1260550 and 1540260, which have been superseded, making it the current correct part for any pump that previously used those older numbers. Why You'll Love the AR2260420 Inlet Bolt Whether you're a homeowner tackling weekend cleaning projects, a contractor running equipment daily, or a technician maintaining a fleet of AR pumps, every benefit below translates directly into fewer headaches and more uptime. Restores Inlet Seal Integrity – Eliminates air leaks and water drips around the unloader inlet port that cause erratic pressure fluctuations and inconsistent spray patterns. Prevents Cavitation Damage – Maintains proper water flow into the pump, protecting plungers, seals, and manifold surfaces from the destructive effects of air bubbles forming and collapsing inside the system. Reduces Unplanned Downtime – A straightforward fix that gets a pressure washer back in service quickly, without replacing entire manifolds or unloader assemblies. Made for AR Pump Geometry – Threading, head style, and banjo-bolt design are matched to Annovi Reverberi manifold castings for a secure fit with minimal risk of cross-threading. Easy for DIY or Pro Techs – Installs with a standard 19 mm wrench; no special jigs, machining, or modifications required. Supports Long-Term Pump Health – Correct inlet bolt torque and seal contact help maintain manifold integrity and extend the service life of internal pump components. What Makes This Inlet Bolt Different Generic or mismatched inlet bolts often introduce more problems than they solve-wrong thread pitch, poor sealing surfaces, and materials that corrode within months. The AR2260420 is built differently. Precisely Matched Threads and Seat – Designed around Annovi Reverberi manifold casting tolerances, the bolt's thread diameter and seat profile minimize cross-threading and ensure even seal compression across the entire contact surface. Integrated Seal Groove Design – The groove depth and profile are matched to AR O-rings and banjo washers so they compress correctly under load, unlike generic bolts that may over-compress or misalign the seal. Corrosion-Resistant Brass Construction – Solid brass resists rust and degradation in wet, detergent-heavy environments far better than plated steel alternatives, keeping sealing surfaces and threads intact over extended use. Designed for AR System Pressures – It operates at a maximum pressure of 3650 PSI and handles the flow rates found in compatible AR unloader-style pump systems without deformation or fatigue. How the AR2260420 Inlet Bolt Works in Your Pump The inlet bolt performs three roles simultaneously: it mechanically secures the unloader body to the pump manifold, compresses sealing components to create a water-tight joint, and channels incoming water through the inlet passage into the pump feed. The AR2260420 also helps channel incoming water during operation, directing the supply from the garden hose or tank through the unloader and into the manifold's low-pressure side. Product Details and Technical Specs This section provides the exact specifications technicians and parts buyers need to confirm fit and plan repairs. Material – Solid brass body. Brass resists corrosion in wet, chemical-laden environments, maintaining thread integrity and sealing surfaces longer than plated steel. Hex Head Size – The AR2260420 has a hex head size of 19 mm, compatible with standard metric socket or open-end wrenches. Thread Dimensions – The AR2260420 has a thread length of 21 mm, matching the bore depth of compatible AR unloader bodies and manifolds. Total Length – The AR2260420 has a total length of 45 mm, including the hex head and threaded shank. Seal Interface – Designed for use with corresponding AR banjo washers, O-rings, or gasket kits (such as AR1260560) specified for the unloader or manifold position. The sealing surfaces must be clean to prevent leaks. Compatibility – The AR2260420 is compatible with several Annovi Reverberi unloader assemblies, including unloaders AR2973, AR2943–AR2947, AR2968, and MiniMatic 4/B series models (AR20821, AR21036, AR20888, among others). It also covers systems where older part numbers 1260550 and 1540260 were originally specified. Position on Pump – Located on the water inlet side, typically at the base of the unloader body where it attaches to the pump manifold. This is not a high-pressure outlet component. What's Included – Includes one AR2260420 brass inlet banjo bolt only. Seals, washers, and O-rings are sold separately. Installation Guide: Replacing the AR2260420 Inlet Bolt Replacement should be performed by a qualified person familiar with pressure washer pump service. This guide covers the general procedure for typical AR pumps using this bolt. Preparation – Shut off power and disconnect the water supply. Squeeze the spray gun trigger to relieve residual pressure, and allow the pump to cool if it has been running. Accessing the Inlet Area – Remove the inlet hose, any inline filters or strainers, and quick-connect fittings to fully expose the AR2260420 bolt location on the manifold or unloader body. Removing the Old Bolt – Use a 19 mm wrench to loosen and remove the existing bolt. Support the manifold or unloader body with your free hand to prevent twisting that could stress or crack castings. Note the orientation of any seals or washers as you remove them. Inspecting Seals and Threads – Clean the manifold threads and bolt seat. Proper installation includes ensuring clean sealing surfaces. Remove old washers and O-rings, checking for hardening, cracking, or permanent compression. Replace damaged seals at the same time. Inspect O-rings regularly to prevent water leaks-even a new bolt will leak if paired with a worn gasket. Installing the New Inlet Bolt – Hand-thread the AR2260420 first to avoid cross-threading. Thread stripping may occur due to over-tightening or cross-threading, so take care with alignment. Once hand-tight, torque to the manufacturer-recommended specification (typically snug plus a fraction of a turn). Do not exceed the sealing surface limits. Leak and Performance Check – Reconnect the water supply and open it slowly. Pressurize the system gradually. Observe for drips around the bolt head, listen for gurgling that indicates air ingestion, and confirm that the pump reaches its rated pressure without surging. Common Symptoms That Point to a Faulty Inlet Bolt Inlet problems often mimic other pump issues such as worn valves, bad unloaders, or supply restrictions. Recognizing these specific symptoms helps narrow down the cause to the AR2260420 bolt itself. Visible Drips at the Inlet Port – Persistent leaks around the bolt head or inlet fitting even after seal replacement point to a damaged, misthreaded, or warped bolt body. Hard to Prime or No Water Draw – The pump struggles to pull water, especially from tanks or low-pressure sources, because the bolt's passage is partially blocked or the connection is admitting air. Mineral buildup can block flow through the AR2260420 over time. Intermittent Pressure Pulsing – Pressure surges or drops that correspond to movement at the inlet connection, particularly when the hose shifts or vibrates under load. Rust or Pitting on the Bolt – Corroded or deformed bolt surfaces that can no longer clamp seals evenly, compromising the seal interface even with new O-rings installed. Stripped Threads – Bolt cannot be tightened properly, or feels loose even when turned fully, creating a leak path that no amount of sealant can fix reliably. Care, Maintenance, and Best Practices Correct care of the inlet bolt and surrounding components prevents premature pump failures and extends the interval between repairs. Inspect During Seasonal Service – Check the AR2260420 bolt condition whenever you change pump oil, winterize equipment, or perform any scheduled maintenance on your AR system. Avoid Over-Tightening – Excessive torque can crack manifold castings, distort sealing washers, or strip the soft brass threads. Use a torque wrench when possible and follow AR specifications. Keep Inlet Filters Clean – Clean or replace inlet screens and strainers regularly so debris doesn't score the bolt's sealing surfaces or accumulate in the banjo passage. Use Compatible Seals and Lubricants – Pair the bolt with AR-specified O-rings and a light, compatible lubricant during installation to ensure proper compression and a lasting seal. Protect from Freezing – Cracking of the brass bolt can occur if water freezes inside it. Always drain the pump and inlet assembly before storing equipment in freezing conditions. Frequently Asked Questions How do I confirm that my pump uses the AR2260420 inlet bolt? Check your pump's model or serial plate and cross-reference it with an Annovi Reverberi parts list or exploded diagram. Look for the "bolt, inlet" position under unloader/inlet parts. If your existing bolt carries part number 1260550 or 1540260, the AR2260420 is the current replacement. You can also measure the existing bolt-a hex head of approximately 19 mm, thread diameter of about 21 mm, and total length of roughly 45 mm confirm a likely match. Can I replace only the inlet bolt without changing seals? You can, but it's generally not recommended. Even a perfect new bolt can leak if paired with a hardened, cracked, or over-compressed O-ring or washer. Replacing seals at the same time is inexpensive insurance against repeat repairs. Is the AR2260420 inlet bolt compatible with hot-water units? Compatibility depends on the specific AR pump model and its temperature rating, not just the bolt. The AR2260420 is designed primarily for cold-water and light-commercial configurations. If your pump is rated for hot water, verify that the entire inlet assembly-including seals-is specified for elevated temperatures. What tools do I need to install the new inlet bolt? A 19 mm open-end or socket wrench is the primary tool. You'll also want clean rags, a pick or hook for removing old O-rings, and optionally a torque wrench to avoid over-tightening. What happens if I keep using a damaged inlet bolt? Ongoing leaks lead to pressure drop, loss of prime, and cavitation damage that can erode plungers, seals, and manifold surfaces. In severe cases, a loose bolt under vibration can cause fatigue cracks in the unloader body or adjacent fittings, turning a simple bolt replacement into a costly manifold repair. Can this bolt be used on non-AR pumps? The AR2260420 is designed specifically for Annovi Reverberi unloader assemblies and manifold geometry. Using it on non-AR pumps risks thread mismatch, improper sealing, and potential system failure. Always match replacement parts to the pump manufacturer's specifications. Ready to Restore Your AR Pump's Inlet? A worn or damaged inlet bolt is one of the most overlooked causes of pressure washer performance problems. The AR2260420 addresses the root issue-restoring the sealed water path that your AR pump depends on for stable pressure, reliable priming, and protection of internal components. Stable water intake, leak-free operation, and prevention of cavitation damage all start with one correctly installed brass bolt. The difference between a pump that runs at full rated output and one that struggles, surges, or leaks often comes down to this single part.