The Filtered Automatic Brass Air Vent Valve is a protective automatic air vent designed specifically for hydronic piping systems prone to impurities. It is manufactured as a single unit from thickened, forged HPb59 brass, with a nickel-plated finish for rust and corrosion resistance. Its compact design fits easily into space-constrained areas such as narrow pipe shafts and manifold ends. Available in various thread sizes, it is suitable for residential underfloor heating, commercial central air conditioning, and domestic water supply lines, effectively resolving three common HVAC system issues: air entrapment, float jamming, and seal leakage.
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Product Specifications |
L |
d1 |
d2 |
Pipe Thread |
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DN |
Size |
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15 |
1/2"M |
55.5 |
1.5 |
8 |
G/PT/NPT |
The valve is hot-forged from HPb59 brass specifically designed for hydronic applications. It features a thickened body wall and a dense material structure free from porosity or sand holes. It reliably withstands the circulating water pressures found in underfloor heating and central air conditioning systems, ensuring no bulging, cracking, or leakage during prolonged exposure to alternating high and low temperatures.
The valve body undergoes a dual-protection process involving polishing and nickel plating. This isolates the brass base material from direct contact with waterborne minerals and moisture, preventing scale buildup and oxidation spots over time. The valve maintains a clean appearance and offers a significantly extended service life.
Brass raw materials undergo batch-by-batch spectral analysis to ensure lead content meets safety standards and prevents heavy metal leaching. The valve is suitable for use in underfloor heating and central air conditioning circulation loops as well as potable water supply lines, complying with environmental regulations for residential water piping.
A micro stainless steel filter screen is built into the valve body. Water flows through the screen before entering the valve's interior, trapping sediment and limescale particles from the pipeline. This prevents hard impurities from becoming lodged between the float and the valve body, ensuring the air-venting mechanism remains responsive and jam-free over the long term.
The filter screen is made of industrial-grade stainless steel, offering resistance to limescale corrosion and the erosive effects of high- and low-temperature water flows. It resists rust and damage across various applications—including high-temperature underfloor heating circulation, chilled water systems for central air conditioning, and ambient-temperature tap water supplies—maintaining effective filtration over time.
The filter screen is a separate, removable component. At the end of the heating season or during maintenance for pipeline blockages, the valve body can be disassembled to remove the screen. It can be cleaned with fresh water and reused, eliminating the need to discard and replace the entire valve and significantly reducing consumable costs for HVAC system operation and maintenance.
Equipped with a high-precision float sensing assembly, the valve automatically opens the vent channel as the float drops when air accumulates and the water level falls. Once the air is expelled and the valve body fills with water, the float rises to close the vent—eliminating the need for manual, repetitive venting operations.
The valve continuously releases air trapped within the pipeline, preventing gas accumulation that could cause airlocks or the humming noise associated with water impact against pipe walls. This ensures uniform water temperatures across underfloor heating systems and stable heat exchange efficiency in central air conditioning, preventing localized heating or cooling performance issues.
Unlike top-venting valves, this model features a side-facing vent opening. It functions correctly regardless of installation angle—horizontal, vertical, or inclined—making it suitable for diverse locations such as manifold ends, the sides of pipes, or concealed ceiling piping, offering greater installation versatility.
Equipped with specialized EPDM seals for HVAC applications, these components undergo rigorous factory testing—including over a thousand high- and low-temperature aging cycles. They remain durable without hardening, shrinking, or cracking, even during long-term exposure to hot water (above 60°C) in underfloor heating systems or the alternating hot and cold water flows found in central air conditioning.
Independent EPDM sealing gaskets are installed at both the threaded connection and the float air-venting chamber. This dual-layer protection prevents pipeline leaks or air vent failures caused by the aging or damage of a single seal, thereby enhancing overall system stability.
The EPDM gaskets and stainless steel filter screens are genuine, independently replaceable parts. If a seal or filter fails due to aging, the specific component can be purchased and swapped out individually to restore sealing and filtration performance, effectively reducing long-term operation and maintenance costs.
Available in a variety of standard thread sizes, the product is compatible with common threading specifications for underfloor heating manifolds, central AC piping, and residential water lines. This eliminates the need for extra reducing adapters in both residential and commercial HVAC projects, simplifying inventory requirements.
The streamlined, compact body significantly reduces the space footprint compared to larger air vent valves. It can be installed directly in tight locations—such as the ends of underfloor heating manifolds, ceiling plenums, narrow vertical pipe shafts, or cramped equipment room piping gaps—without obstructing other pipeline components.
The Filtered Automatic Brass Air Vent Valve features a detachable, modular design. When cleaning pipes or troubleshooting venting issues after the heating season, there is no need to cut into embedded piping; the valve body can be unscrewed by hand to clean the filter or replace the gasket. All maintenance tasks can be performed by a single person, making servicing easy and accessible.
Professional technicians provide one-on-one guidance on valve thread assembly standards, float sensitivity adjustment, stainless steel filter disassembly and cleaning, and troubleshooting for leaks (water or air), thereby reducing rework time during on-site installation and commissioning.
A multilingual online support team accommodates time zones worldwide, ensuring rapid responses to inquiries regarding product selection, bulk order tracking, and after-sales troubleshooting from overseas plumbing wholesalers and HVAC contractors, facilitating seamless cross-border communication.
Tailored solutions are available for bulk procurement projects—such as residential underfloor heating for housing complexes or central air conditioning for commercial buildings and offices. We customize product selection and matching configurations based on pipe diameters and installation layouts, optimizing the inventory list for the entire HVAC piping system.
Long-term, continuous supply of genuine replacement parts (e.g., EPDM gaskets, stainless steel filters, float assemblies); the entire range of automatic air vent valves with filters comes with a standard 12-month manufacturer's warranty covering material and workmanship defects—such as brass body cracking, factory seal leaks, float jamming, and filter corrosion or damage—with free technical guidance and replacement parts provided.
Designed specifically for the manifold terminals of underfloor heating systems in apartments and private homes; highly adaptable to regions with high levels of tap water impurities and limescale. The integrated filter blocks debris to protect the float mechanism, automatic venting eliminates noise caused by water flow in the heating system, and the compact valve body fits easily into small residential underfloor heating cabinets.
Designed for integration with central HVAC units and branch piping in shopping malls, office buildings, and hotels. It provides continuous filtration via a stainless steel mesh to protect against the sediment and debris that often accumulate in circulating chilled/hot water systems. Its side-discharge design accommodates various piping angles in mechanical rooms, ensuring stable heat exchange performance.
Suitable for main residential water inlets and pre-filtration lines for water purification systems. It automatically vents trapped air to eliminate noise caused by air pockets and uses a mesh screen to catch rust and sediment from the municipal supply, preventing internal clogs in purification equipment. The lead-free valve body is safe for direct contact with potable water.
Standard air vents (without filters) often suffer from stuck floats and venting failures. This model allows for a direct replacement without the need to modify embedded piping; its built-in filter blocks impurities at the source, significantly reducing the frequency of future maintenance.
Filtered Automatic Air Vent Valve: Focuses on the core functions of automatic filtration and continuous air venting. It handles air release and impurity filtration but lacks a drainage function; it is ideal for systems with high impurity levels where the primary goal is resolving airlocks and associated noise.
Integrated Manifold End Valve: Offers a combined automatic air venting and independently controllable drainage function. It allows for periodic valve opening to flush out sediment and scale accumulated at the bottom of the piping; it is ideal for use at the ends of underfloor heating manifolds and in heating systems requiring regular coil flushing and drainage.
Automatic air vent with filter: Features an independent stainless steel pre-filter inside the valve body; water is filtered before contacting the float, effectively blocking tiny impurities and scale particles over the long term to prevent the float from jamming.
Integrated air vent and drain valve: Lacks an internal filter; relies solely on a terminal drain ball valve to periodically flush out large sediment deposits, making it unable to intercept fine scale or rust particles in the circulating water in real-time.
Automatic air vent with filter: Compact body with multi-angle side-venting capability; suitable for central air conditioning piping, residential mains, any branch of underfloor heating piping, and tight, concealed spaces above ceilings.
Integrated air vent and drain valve: Standard 1-inch thread; specifically designed for the end-cap position of underfloor heating manifolds. Installation is fixed to the manifold tail-end; unsuitable for central air conditioning or standard water supply lines.
Automatic air vent with filter: Suitable for mains water networks, older HVAC piping, and systems with high levels of impurities, rust, or scale; relies on continuous filtration to reduce the risk of malfunction.
Integrated air vent and drain valve: Suitable for closed-loop underfloor heating systems where water quality is clean and impurities settle at the bottom of the manifold; relies on periodic draining to clear accumulated deposits rather than continuous filtration of the circulating flow.
Automatic air vent with filter: Routine maintenance focuses on periodically removing and rinsing the internal stainless steel filter; does not require large-scale draining or flushing; simple enough for a single person to operate.
Integrated air vent and drain valve: Core maintenance involves periodically opening the drain valve (connected to an external hose) to flush out large volumes of wastewater and clear sediment from the heating coils; requires a drainage hose for operation.
Address
Bingang Industrial Park, Ganjiang Town, Yuhuan City, Zhejiang Province, China
