Installations involving wall-hung boilers, water heaters, and underfloor heating manifolds often face two difficult challenges: standard short male threads lack sufficient length, and cramped equipment cavities leave inadequate piping clearance, preventing proper fitting engagement. Furthermore, fixed, integrated-thread valves require cutting the pipeline for leak repairs, resulting in high material waste and labor costs.
Huitong developed Union Type Long Male Thread Brass Ball Valve—featuring extended male threads and a union connection—specifically for HVAC equipment with tight spacing constraints. One end features an integrated, precision-machined extended male thread designed to fit compact installation gaps in water heaters and boilers, effectively compensating for insufficient piping distance. The other end utilizes a detachable union nut, allowing the valve body to be serviced or replaced without cutting the existing pipeline, thus balancing ease of initial installation with convenient long-term maintenance.
1. Integrated Extended Thread Section: Compared to standard short male-thread valves, this model features an extended threaded section that ensures sufficient engagement length. Even when the clearance between the appliance (boiler or water heater) and the wall is minimal, the threads engage fully, eliminating risks such as shallow thread engagement or incomplete gasket compression that could lead to leaks.
2. Precision CNC-Machined Threads: The thread profile and pitch strictly adhere to universal plumbing standards. With low surface roughness, the valves screw in smoothly without burrs. The threads remain secure against long-term equipment vibration and do not loosen on their own, effectively preventing slow-drip leaks at the connection point.
3. Factory-Calibrated Coaxiality: The coaxial accuracy of the extended male thread is individually inspected to ensure the thread centerline perfectly aligns with the valve body's flow channel. This prevents uneven gasket compression or deformation during pipe connection and ensures long-term, stable sealing under the stress of alternating hot and cold water pressure cycles.
1. Detachable Union for Non-Destructive Disassembly: The union end features a split-nut design. If the valve becomes clogged or the seal ages and leaks, the valve body can be removed simply by loosening the union nut. This preserves the existing piping and eliminates the need to purchase new copper tubing or re-thread pipes.
2. Standardized Union Fit and Clearance: Factory-controlled tolerances for the union threads ensure optimal tightness. The sealing gasket resists rapid deformation even after repeated disassembly and reassembly, maintaining an airtight, leak-free seal after maintenance—ideal for water heater circulation loops requiring frequent servicing.
3. Independently Replaceable Union Parts: The union nut and internal gasket are separate, genuine replacement parts. If only the seal ages, the gasket can be replaced individually without discarding the entire valve, significantly reducing consumable costs for large-scale residential installations.
1. One-Piece Forged, Thick-Walled Body: This Union-Type Long Male Thread Brass Ball Valve is forged from a single piece of lead-free DZR brass. The valve body features uniform, substantial wall thickness, offering superior pressure resistance compared to thinner die-cast bodies. It withstands instantaneous high-pressure surges from tap water or underfloor heating system cycling without bulging or cracking.
2. Dezincification and Oxidation-Resistant Material: The material is inherently resistant to limescale buildup and electrochemical corrosion. It prevents heavy limescale accumulation during years of hot and cold tap water circulation and ensures no heavy metal leaching, meeting lead-free environmental standards for residential drinking water piping.
3. One-Piece Seamless Construction: The Union Type Long Male Thread Brass Ball Valve body is forged as a single unit without segmented welds, eliminating dead zones where scale or impurities could accumulate. This reduces the risk of pipeline blockages and localized corrosion, making it suitable for whole-house water supply and continuous year-round operation in underfloor heating systems.
1. Bidirectional Airtight Sealing: The ball features a mirror-polished, chrome-plated surface that is wear-resistant and scale-resistant. Thickened, double-sided PTFE seals ensure a tight fit, achieving bubble-tight sealing for both forward and reverse hot/cold water flows; the sealing layer resists hardening or failure under fluctuating day-night temperatures.
2. Full-Bore Straight-Through Flow Path: The internal cavity features no diameter reduction or flow-restricting protrusions, resulting in minimal flow resistance. This prevents issues such as uneven underfloor heating or reduced hot water flow rates, fully maintaining the pipeline's design efficiency and lowering circulation pump energy consumption.
3. Built-in Blowout-Proof Stem with Locking Mechanism: A limiting back-sealing structure at the base of the stem buffers against instantaneous high-pressure surges. This eliminates the risk of stem ejection or high-temperature water spraying, preventing safety hazards caused by leaks within the confined spaces of wall-mounted boilers or water heater cabinets.
1. Extended Lever Arm for 90° Operation: The long handle increases leverage, allowing for full opening or closing with a simple 90° turn. Even when the valve is deeply recessed within underfloor heating manifold boxes or enclosed water heater cabinets, it can be easily operated without removing insulation layers.
2. Clear On/Off Status Indication: The travel range between fully open and fully closed positions is distinct. During long-distance inspections of concealed piping in utility rooms or above-ceiling spaces, the flow status is instantly recognizable, minimizing the risk of overflow or supply interruption caused by operational errors.
3. Compact Handle-to-Body Integration: The valve design allows for complete wrapping with insulation material, with only the long handle slightly exposed. This preserves the integrity of the pipeline's insulation system, making it ideal for standardized installation layouts involving built-in appliances and concealed in-wall piping.
1. Pre-screening of Brass Raw Materials via Spectroscopy: All forged brass billets undergo spectral composition analysis upon arrival. We strictly verify three critical metrics—lead content, dezincification resistance, and pressure resistance—rejecting substandard materials to ensure the safety of drinking water pipelines at the source.
2. 100% Comprehensive Inspection of Finished Products: Every Union Type Long Male Thread Brass Ball Valve undergoes individual testing for shell hydrostatic pressure resistance, bubble-based airtightness, and 10,000-cycle durability. This process filters out defects such as seal leakage, stiff operation, and valve body cracking under pressure.
3. Dual Specialized Verifications: We specifically test the coaxiality of the extended male threads, the fit clearance of the union nut, and the tightness of the union seal. This prevents common residential plumbing failures, such as leakage due to insufficient thread engagement and loosening caused by vibration.
4. Batch-Level Traceability: Each product is laser-marked with a unique batch code, and records covering forging, threading, assembly, and inspection are permanently archived. For every shipment, we provide material spectral 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.
1. Inlet/Outlet Piping for Wall-Mounted Gas Boilers: Designed to fit the compact installation spaces of wall-mounted boilers; the extended male thread bridges the gap between the wall and the unit. The union structure facilitates future descaling and maintenance—allowing the valve body to be removed without damaging the piping embedded in the wall.
2. Water Circuitry for Storage and Instantaneous Water Heaters: Tailored for the compact piping layouts at the base of water heaters; the extended threaded section resolves connection issues caused by insufficient clearance between the unit base and the wall. The union design allows for disassembly without cutting the copper inlet pipe, ensuring convenient maintenance.
3. Branch piping for individual-unit underfloor heating manifolds: Designed for water control valves within compact, enclosed underfloor heating cabinets; features a long handle for easy individual shut-off and an extended male-threaded connection for direct attachment to the manifold, while the union structure facilitates flushing and maintenance of single heating circuits.
4. Whole-house plumbing retrofit for hot and cold water supply: Specially designed for concealed or embedded plumbing retrofits in small apartments; the extended thread accommodates short, pre-embedded wall fittings, and the union design allows for non-destructive disassembly—ideal for future system expansion or filter replacement.
A: The extended thread has undergone specialized vibration durability testing. CNC-machined precision threading ensures a larger contact area and higher friction, while the included gasket absorbs vibration; the connection remains secure against loosening or thread slippage even under continuous 24-hour pump vibration. Periodic slight tightening of the union nut maintains a long-lasting seal.
A: The valve features a thickened, heat-resistant PTFE union gasket and precision-machined union threads; sealing performance remains stable through up to eight proper assembly/disassembly cycles. If slight seepage occurs after repeated use, simply replacing the original gasket restores a leak-free seal without needing to discard the entire valve.
A: Water heater cycling and heating pump switching can cause sudden spikes in water pressure, which often force standard valve stems upward, creating gaps and leaks. Union Type Long Male Thread Brass Ball Valve's back-sealing, blow-out-proof stem securely locks the internal ball and buffers pressure fluctuations, eliminating safety hazards such as high-temperature water spraying or leakage damaging the equipment's circuitry within the confined space of a water heater cabinet.
A: Thin-walled die-cast brass valve bodies feature complex internal crevices that easily accumulate limescale, thereby narrowing the flow passage. In contrast, this product is forged as a single unit with smooth internal walls and no dead zones; its thickened DZR material resists limescale and oxidation. Over the same service period, the risk of pipeline blockage and valve body corrosion is significantly lower than with conventional thin-walled ball valves, reducing the frequency of household plumbing cleaning.
Address
Bingang Industrial Park, Ganjiang Town, Yuhuan City, Zhejiang Province, China
