PEX-Al-PEX Pipe Long Union Brass Ball Valve

Our PEX-Al-PEX Pipe Long Union Brass Ball Valve is engineered specifically for the operational requirements of PEX-AL-PEX composite piping. It features a lead-free, dezincification-resistant, thickened forged brass body and an extended, integrated compression union structure to bridge narrow installation gaps. Equipped with a specialized double-layer compression ring for PEX-AL-PEX pipe, it ensures uniform clamping force without deforming the pipe. The detachable union nut allows for non-destructive disassembly and maintenance, eliminating the need to cut existing piping. Internally, a mirror-chrome-plated solid ball core pairs with a thickened PTFE seat; the full-bore design minimizes pressure loss during water circulation. A blowout-proof stem with a reverse seal accommodates pressure fluctuations from alternating hot and cold water, while an extended handle ensures easy operation within enclosed cabinets.

Technical parameters

Extended Integrated Compression Union

1. Extended compression section bridges installation gaps: Unlike standard short-fitting valves, this PEX-AL-PEX long-union ball valve utilizes an extended compression structure. This ensures sufficient engagement length even in tight spaces—such as when wall-mounted boilers or water heaters are installed flush against a wall or within narrow equipment compartments—preventing issues like insufficient clamping, pipe loosening, or leakage.

2. Specialized double-layer compression ring for uniform force: The valve comes with a custom double-layer clamping ring designed to match the soft-and-hard composite structure of PEX-AL-PEX piping. Tightening the nut distributes the force evenly, preventing dents or cracks caused by concentrated pressure and ensuring the pipe remains secure against slippage during long-term water circulation and vibration.

3. Extended structure simplifies piping layout, eliminating the need for extra adapters: The integrated extended union end connects directly to equipment interfaces without requiring extension fittings. This reduces connection points, lowers the risk of leaks in concealed residential piping, and cuts down on on-site assembly time.

Detachable Split-Union Structure

1. Non-destructive disassembly without cutting PEX-Al-PEX pipe: Featuring an independent split-nut design at the union end, the valve body can be removed simply by loosening the union nut—even if debris accumulates or the PTFE gasket ages and leaks later. The embedded PEX-Al-PEX piping remains intact, eliminating the need for the full process of re-cutting, re-flaring, and re-tightening compression fittings.

2. Standardized union tolerances ensure minimal sealing degradation over repeated disassembly: Factory-calibrated thread engagement ensures optimal tightness. Internal gaskets resist rapid deformation after repeated assembly/disassembly, maintaining an airtight, leak-free seal post-maintenance—ideal for systems requiring periodic servicing, such as air-source heat pumps and water heater circulation loops.

3. Compression rings and sealing gaskets available as individual replacements: Clamps, PTFE gaskets, and union nuts are independent OEM parts. Only worn components need to be purchased and replaced, avoiding the need to discard and replace the entire valve; this significantly reduces long-term consumable costs for residential installations.

Thickened Lead-Free Forged Brass Valve Body

1. Integrated forging with thickened walls: The PEX-Al-PEX Pipe Long Union Brass Ball Valve is forged from a single piece of DZR (Dezincification Resistant) lead-free brass. The uniform, thick wall offers superior pressure resistance compared to thinner die-cast bodies, preventing bulging or cracking caused by the instantaneous high-pressure spikes common in underfloor heating and water heater cycling.

2. Dezincification and oxidation resistance prevents scaling and corrosion: The material naturally resists limescale buildup and electrochemical corrosion. It prevents extensive scaling during continuous circulation of hot and cold tap water and ensures no heavy metal leaching, meeting environmental standards for lead-free residential drinking water piping.

3. Smooth internal valve body with no seams or dead zones: Formed via integral forging, the body lacks segmented welds or assembly gaps, eliminating accumulation points for limescale and sediment; this reduces the frequency of required flushing for aluminum-plastic piping and lowers the maintenance workload for household plumbing systems.

Combined Sealing and Flow-Through Structure

1. Bidirectional airtight sealing and leak prevention: The ball core undergoes high-precision mirror-finish chrome plating, resulting in a smooth, wear-resistant, and scale-resistant surface; thickened double-sided PTFE seats ensure a tight fit, achieving bubble-tight sealing for both forward and reverse hot/cold water flows, while the sealing layer resists hardening or failure under fluctuating day-night temperatures.

2. Full-bore straight-through internal cavity: The valve body features no bore reduction or flow-restricting protrusions, ensuring minimal flow resistance; this prevents issues such as uneven heating temperatures in underfloor heating zones or reduced hot water flow rates, fully maintaining the system's design flow capacity and reducing the load on circulation pumps.

3. Built-in anti-blowout reverse-sealing stem: A locking reverse-sealing structure at the stem base buffers against instantaneous high-pressure surges during system startup and shutdown; this eliminates the risk of the stem being forced upward by water pressure or hot water spraying out, preventing leaks that could damage electrical components inside enclosed cabinets housing water heaters or wall-mounted boilers.

Extended Control Handle

1. Extended lever arm for effortless 90° operation: The extended handle increases leverage, allowing for full opening or closing with just a 90° turn; even when the valve is deeply recessed within underfloor heating manifold cabinets or enclosed sheet-metal water heater housings, it can be operated easily without removing insulation, avoiding issues with obstructed access or binding.

2. Clear distinction between open and closed positions: The travel limits for fully open and fully closed positions are clearly defined; this allows for instant visual confirmation of the flow status during long-distance inspections of concealed piping in ceiling voids or equipment service spaces, thereby minimizing the risk of overflows or supply interruptions caused by operational errors.

3. Valve body fully accommodates insulation: The extended compression fitting section and valve body can be completely wrapped in insulation material, with only the handle extending slightly outward; this preserves the integrity of the pipeline insulation structure and minimizes heat loss in air-source heat pump and underfloor heating systems.

Strict Tiered Quality Control

1. Dual-stage spectral screening of raw materials (brass, compression fittings, and seals): Incoming forged brass billets, clamps for aluminum-plastic composite (PEX-Al-PEX) pipes, and PTFE sealing rings undergo material composition testing. Strict controls on lead-free status, temperature resistance, and aging resistance ensure suitability for the thermal cycling conditions of PEX-Al-PEX piping systems from the source.

2. 100% inspection of three key performance indicators for finished products: Every PEX-Al-PEX long-union brass ball valve undergoes hydrostatic shell pressure testing, bubble-based airtightness leak testing, and 10,000-cycle durability testing to eliminate defects such as seal leakage, sticking mechanisms, or valve body cracking under pressure.

3. Specialized verification of extended compression fittings and unions: Individual checks are performed on the clamping precision of the extended fitting, the thread engagement tightness of the union, and the sealing fit of the clamp. These measures specifically address common PEX-Al-PEX piping failures, such as pipe slippage and leakage caused by union vibration.

4. Full-batch traceability and comprehensive compliance documentation: Each PEX-Al-PEX Pipe Long Union Brass Ball Valve is laser-etched with a unique batch code, and records covering forging, assembly, and testing are permanently archived. Shipments are accompanied by material spectral analysis reports, CE lead-free certification, and factory hydrostatic test reports, meeting requirements for customs clearance by overseas wholesalers and project acceptance for domestic HVAC installations.

Full-Lifecycle Support Services

1. Comprehensive technical guidance for PEX-Al-PEX pipe installation: Professional technicians provide one-on-one support covering standard pipe cutting methods, torque control for tightening extended fittings, pressure testing of sealed piping systems, and troubleshooting protocols for leaks at fittings and unions, thereby reducing labor hours spent on rework and adjustments at the job site.

2. Multilingual 24/7 Online After-Sales Support: We provide multilingual online consultation to domestic and international plumbing wholesalers, manufacturers of air-source heat pumps and wall-hung boilers, and home renovation contractors. We ensure rapid handling of inquiries regarding model selection based on operating conditions, assembly questions, and fault reports, overcoming geographical and time-zone constraints.

3. Customized Solutions for Large-Scale Heating and Water Supply Projects: We offer volume-matched solutions for individual-unit underfloor heating and water heater systems, including standardized model configurations tailored to the tight installation spaces within equipment housings. We ensure a stable, long-term supply of OEM consumables—such as compression fittings, gaskets, and replacement handles—guaranteeing reliable spare parts availability for years of maintenance.

4. 12-Month OEM Warranty: A standard 12-month warranty applies to our entire range of brass ball valves with extended unions for PEX-Al-PEX (aluminum-plastic composite) piping. Under normal domestic hot/cold cycling conditions, issues arising from materials or manufacturing—such as pipe slippage, union leakage, seal failure, or valve body corrosion—are covered by free technical remediation and replacement parts.

Differentiated Selection Guide

1. PEX-Al-PEX Piping for Wall-Hung Gas Boilers 

PEX-Al-PEX Pipe Long Union Brass Ball Valve fits the compact installation cavities of wall-hung boilers; the extended compression fitting bridges the gap between the wall and the unit, while the double-ferrule design ensures a secure grip on the pipe. The non-destructive union structure facilitates descaling and maintenance without requiring the cutting of embedded piping.

2. Inlet/Outlet Piping for Storage or Instantaneous Water Heaters

Designed for compact PEX-Al-PEX piping layouts at the base of water heaters, the extended compression fitting solves issues caused by insufficient clearance between the unit base and the wall (preventing slippage and leakage due to inadequate grip length). The union design allows for disassembly without cutting the inlet pipe, ensuring convenient maintenance.

3. PEX-Al-PEX Piping for Individual Underfloor Heating Manifold Branches

A water control valve designed for the tight, enclosed spaces of underfloor heating cabinets; the extended handle allows for easy independent shut-off of heating for individual units, while the extended compression fitting accommodates specialized underfloor heating PEX-Al-PEX pipe. The non-destructive union structure facilitates the flushing of individual heating circuits and the repair of blockages.

4. Aluminum-Plastic Composite Piping for Air-Source Heat Pump Heating/Cooling Circulation

Designed for the compact internal circulation piping of air-source heat pump units, this piping withstands the rigors of long-term thermal cycling (alternating hot and cold water flow). Its extended compression union structure accommodates the unit's compact layout, while the design allows for valve disassembly and maintenance without the need to cut the piping.