AR21669-PKG | VR35 3/B Unloader Package, 4200 PSI, GHA Adapter, Filter

AR21669-PKG by Annovi Reverberi — Complete Gymatic VR35 3/B Unloader Plumbing Package | 4,000–4,200 PSI | 2.0–5.0 GPM | Forged Brass Body and Bypass Housing | Garden Hose Adapter | Stainless Inline Filter | Banjo Bolts | Chemical Injection Port

The AR21669-PKG by Annovi Reverberi is a complete high-pressure unloader plumbing package engineered for professional pressure washer systems operating at 4,000–4,200 PSI that need stable pressure regulation, full-brass construction throughout, inlet filtration, automatic bypass protection, and chemical injection capability — without the sourcing complexity of assembling individual components. Built around the proven Gymatic VR35 3/B unloader valve (AR21669), the AR21669-PKG delivers a turnkey pressure regulation and plumbing solution rated for 4,000–4,200 PSI and 2.0–5.0 GPM — with a forged brass unloader body, forged brass bypass and inlet housing, stainless steel inline filter, garden hose adapter, banjo bolts with O-rings and seals, manual pressure control knob, and a chemical injection port, all in one organized kit. As part of Annovi Reverberi’s pump and unloader assemblies stocked and supported by WSHPWR, the AR21669-PKG is the correct specification for contractors, OEM builders, fleet operators, and industrial facilities who need a complete, fully compatible Gymatic VR35 unloader plumbing assembly at the 4,000–4,200 PSI operating range.

The AR21669-PKG does not include a pump — it is a standalone unloader plumbing kit designed to complete the pressure regulation and inlet plumbing side of an existing or new high-pressure washer system. The Gymatic VR35 3/B unloader, GHA inlet adapter, stainless filter, banjo hardware, pressure control knob, and chemical injection port are pre-selected for compatibility at the rated high-pressure operating range. Open the kit, connect the components, and the pressure regulation side of the system is complete.

Everything in the Kit — AR21669-PKG Complete Contents

Gymatic VR35 Unloader. Full Brass Construction. GHA Adapter. Stainless Filter. Banjo Hardware. Chemical Injection. Nothing Left to Source.

• Gymatic VR35 3/B unloader valve (AR21669) — the core of the AR21669-PKG. Precision adjustable pressure control for fine PSI tuning under heavy load. Engineered for smooth, stable pressure regulation across continuous-duty commercial and industrial cleaning systems operating at 4,000–4,200 PSI. Automatic bypass system protects the pump whenever the spray trigger is released — preventing dead-head pressure spikes and heat buildup at the 4,000 PSI operating level where heat accumulation is faster and more damaging than at lower pressure ranges.
• Forged brass bypass and inlet housing — the defining construction advantage of the AR21669-PKG at the 4,000–4,200 PSI range. Where lower-pressure packages use aluminum bypass housings, the Gymatic VR35 3/B employs forged brass throughout — body and housing. Forged brass provides maximum strength, fatigue resistance, and corrosion resistance under the sustained high-pressure cycling of contractor and industrial cleaning programs. Built to withstand pressure fatigue and harsh operating environments where aluminum bypass designs reach their design limits.
• Garden Hose Adapter (GHA) — fast connection to standard garden hose water supplies. Direct connection to residential or commercial supply lines without additional fittings or thread adapters at the water source.
• Stainless steel inline filter — traps sediment, debris, and scale before they reach the Gymatic VR35 valve seats or the downstream pump. At 4,000–4,200 PSI, particulate damage to valve seats accelerates wear rates significantly — the stainless filter is the first line of defense. Cleanable and serviceable in the field without special tools.
• Banjo bolts with O-rings and seals — all critical plumbing joints use banjo bolt and O-ring sealing for leak-free, service-friendly connections at high-pressure operating conditions. O-ring replacement restores full sealing integrity at low cost with standard hand tools.
• Manual pressure control knob — smooth-turning, repeatable PSI adjustment for matching system pressure to tool selection and surface type. Holds consistent set-point over long service intervals without drift.
• Chemical injection port — integrated into the AR21669-PKG assembly for drawing detergents directly into the high-pressure water stream. Connects to a standard chemical suction line for downstream detergent application at the 4,000 PSI output level.

Decoding the AR21669-PKG

What This Annovi Reverberi Unloader Package Designation Tells You

• AR21669 — Annovi Reverberi part number for the Gymatic VR35 3/B unloader valve: Gymatic VR35 Series, no injector suffix, rated 4,000 PSI, 2.0–5.0 GPM, 1/2″ M inlet, 3/8″ M NPT outlet, forged brass bypass housing
• PKG — Complete plumbing package: Gymatic VR35 3/B unloader, GHA inlet adapter, stainless inline filter, banjo bolts with O-rings and seals, manual pressure control knob, and chemical injection port — everything required for a complete high-pressure unloader plumbing installation. Pump not included.

Annovi Reverberi Unloader Package Family — Choosing the Right Pressure Rating

All three packages include GHA inlet adapter, stainless filter, banjo hardware, and chemical injection port. Pressure rating and construction specification drive the selection:

• AR23504-PKG — VRC-B unloader. 2,600–2,800 PSI / up to 4.0 GPM. 3/8″ F NPT inlet. Standard aluminum bypass housing. RC Series. Compact format for residential and light contractor installations.
• AR20821-PKG — Mini-Matic 4/B unloader. 2,600–2,800 PSI / 2.0–5.0 GPM. 1/2″ F inlet. Anodized aluminum bypass housing. Wider flow range with enhanced housing corrosion resistance.
• AR21669-PKG (this model) — Gymatic VR35 3/B unloader. 4,000–4,200 PSI / 2.0–5.0 GPM. 1/2″ M inlet. Forged brass body and bypass housing throughout. The correct specification for contractor rigs, fleet wash systems, industrial facilities, and municipal cleaning operations where 4,000 PSI output and full brass construction are the requirements.

Key Specifications

AR21669-PKG Technical Details at a Glance

• Rated Pressure: 4,000–4,200 PSI operating range
• Flow Range: 2.0–5.0 GPM
• Unloader Valve: Gymatic VR35 3/B (AR21669) — precision adjustable, automatic bypass
• Unloader Body: Forged brass — maximum strength, fatigue resistance, and corrosion resistance
• Bypass/Inlet Housing: Forged brass — full brass construction throughout; outperforms aluminum bypass designs at 4,000+ PSI
• Inlet Connection: 1/2″ M (male)
• Outlet Connection: 3/8″ M NPT (male)
• Inlet Adapter: Garden Hose Adapter (GHA) — standard garden hose supply connection
• Filtration: Stainless steel inline filter — sediment, debris, and scale protection
• Hardware: Banjo bolts with O-rings and seals — leak-free, service-friendly connections
• Pressure Control: Manual adjustment knob — precise PSI tuning, consistent set-point
• Chemical Injection: Integrated injection port — downstream detergent application
• Sealing: O-ring sealed at all critical joints
• Pump: Not included — standalone unloader plumbing kit
• Warranty: 5-year limited warranty — US-based coverage through Annovi Reverberi North America

Gymatic VR35 — Full Brass Construction at 4,000 PSI

Why Forged Brass Throughout Matters at the 4,000 PSI Operating Level.

• Full brass at 4,000 PSI — the correct material specification — at 2,600–2,800 PSI, anodized aluminum bypass housings perform reliably across contractor and residential duty cycles. At 4,000–4,200 PSI, the pressure cycling load on bypass housing walls, threads, and sealing surfaces is substantially higher. The AR21669-PKG’s forged brass bypass and inlet housing provides the structural integrity and fatigue resistance that sustained high-pressure contractor and industrial service demands. This is not an upgrade — it is the correct material specification at this pressure range.
• Precision adjustable pressure control under heavy load — the Gymatic VR35 3/B is engineered specifically for smooth, stable pressure regulation under the heavy, continuous loads of commercial and industrial cleaning programs at 4,000 PSI. Contractor rigs running concrete restoration, graffiti removal, and surface preparation; fleet wash systems for trucks, buses, and heavy equipment; industrial facilities requiring 4,000+ PSI washdown capability — the Gymatic VR35 maintains stable set-pressure and smooth bypass behavior across all of these duty cycles.
• Automatic bypass at 4,000 PSI — pump protection at the highest stress point — at 4,000 PSI, dead-heading the pump against a closed trigger causes pressure spikes and heat buildup that are more severe and faster-developing than at lower pressure ranges. The Gymatic VR35 3/B’s automatic bypass instantly redirects pump flow whenever the trigger is released — at every single trigger cycling event across the entire duty cycle — protecting pump packing, valves, and plungers from the damage that accumulates without proper bypass management at this pressure level.
• Stainless filter — critical protection at 4,000 PSI — valve seat wear from particulate contamination accelerates significantly at 4,000 PSI compared to lower-pressure systems. The stainless inline filter in the AR21669-PKG is the first line of defense against the premature valve seat wear that shortens service intervals in high-pressure systems running improperly filtered supply water.

Typical Applications

Where the AR21669-PKG Delivers Best Results

• Contractor rigs — concrete restoration, graffiti removal, and surface preparation — the AR21669-PKG’s Gymatic VR35 full brass construction and 4,000–4,200 PSI rating provide the correct unloader plumbing specification for contractor skid and trailer builds where maximum pressure output and long-term bypass housing integrity are installation priorities
• Fleet wash systems — trucks, buses, and heavy equipment — continuous-duty high-pressure wash bays where the Gymatic VR35’s automatic bypass, stable pressure regulation, and full brass construction support high-cycle daily programs across the 2.0–5.0 GPM flow range
• Agricultural washdown and irrigation system flushing — high-pressure agricultural cleaning where the forged brass housing resists the corrosive operating environments that challenge aluminum bypass designs over seasonal service cycles
• Industrial facilities requiring 4,000+ PSI washdown capability — machinery cleaning, conveyor washdown, and plant maintenance programs where continuous-duty 4,000 PSI pressure regulation requires the structural integrity of full brass construction throughout the bypass assembly
• Municipal and public works cleaning systems — sidewalk cleaning, public works maintenance, and transit vehicle washing programs where standardized, serviceable O-ring hardware and forged brass construction support scheduled maintenance programs at the high-pressure output level
• Commercial rental equipment — long service life and simple O-ring maintenance make the AR21669-PKG the correct unloader plumbing specification for rental fleet installations running at 4,000 PSI where bypass housing durability directly impacts between-rental service requirements

5-Year US Warranty, National Parts Availability, and Wholesale Pricing

Built in Italy. Gymatic VR35 Full Brass Platform. Complete High-Pressure Plumbing Kit. Backed for Five Years.

The AR21669-PKG is protected by Annovi Reverberi’s 5-year limited warranty through the US-based warranty and service network administered by AR North America. Every serviceable component — Gymatic VR35 O-ring service kits, stainless filter elements, banjo bolt hardware, GHA adapter, and chemical injection fittings — is stocked nationally through authorized AR North America distribution channels. Contractors, fleet operators, industrial facility managers, agricultural operations, municipal service teams, OEM equipment builders, resellers, and volume buyers are invited to contact the WSHPWR wholesale team for pricing on the AR21669-PKG and the complete WSHPWR pump and unloader assembly lineup. WSHPWR maintains one of the most complete Annovi Reverberi inventories available through any US web store — with thousands of products in stock and a continually expanding catalog.

4,000–4,200 PSI. 2.0–5.0 GPM. Gymatic VR35 3/B. Full Forged Brass Body and Bypass Housing. GHA Inlet. Stainless Filter. Banjo Hardware. Chemical Injection Port. Everything in One Kit.

Italian Engineering. Gymatic VR35 Full Brass High-Pressure Package. Pump Not Included. 5-Year US Warranty.

When the system operates at 4,000 PSI and the bypass housing must be brass — the AR21669-PKG is the specification. Gymatic VR35 3/B forged brass unloader. Forged brass bypass and inlet housing throughout. GHA inlet adapter. Stainless inline filter. Banjo bolts with O-rings. Manual pressure control knob. Chemical injection port. Five-year US warranty. Pump not included. Open the kit, connect the components, and the pressure regulation side of the 4,000 PSI system is done.

Volume buyers and wholesale accounts can reach the WSHPWR team directly at wholesale@wshpwr.com to discuss pricing across the complete Annovi Reverberi unloader and pump assembly lineup.