Taco 1/2" Combo Air Vent and Tank Drain Fitting
Taco 1/2" Combo Air Vent and Tank Drain Fitting
National Boiler Supply is a premier, authorized procurement distributor for high-efficiency commercial equipment. Every order ships factory-direct, completely insured, and backed by full manufacturer engineering warranties and technical field support.
| Technical Metric | Operational Threshold Data |
|---|---|
| Manufacturer Part Number | 463-1 (Model 463 Series) |
| Connection Sizing Interface | 1/2" Male NPT x 1/2" Female NPT |
| Body Cast Formulation | Heavy Commercial-Grade Cast Bronze / Brass |
| Maximum System Pressure | 125 PSIG (862 kPa) |
| Maximum Fluid Working Temp | 240°F (115°C) |
| Venting Tubes Included | 1x 6" Extension & 1x 12-1/4" Copper Air Tubes |
| Valve Function Mechanics | Single Handle Combination Isolation and Drainage |
| Media Fluid Tolerances | Water, Closed Hydronic Glycol Mixes up to 50% |
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The Taco Comfort Solutions 463-1 Combination Tank Fitting is a heavy-duty, commercial-grade cast bronze component designed to provide simplified fluid control and venting for conventional plain steel expansion reservoirs. This all-in-one plumbing specialty unit flawlessly integrates a secure isolation shut-off valve and a high-flow tank drain into a single solid-body design. By keeping free and entrained air trapped up inside the main compression cushion reservoir, it guarantees optimal system pressurization and protects hydronic heating configurations against wide-ranging thermal water-volume fluctuations.
Key Operational & Engineering Features:
- Smart Dual-Action Handle Control: Engineered with a smart single-handle setup. Threading the internal needle-handle completely "in tight" opens the primary reservoir line to the boiler; backing the handle completely "out tight" securely seals the system loop off while opening the integrated drain pathway.
- Included Rigid Air Tube Extensions: Shipped complete with one 6-inch and one 12-1/4 inch copper air vent tube extension segment. These elements guide escaping micro-bubbles directly up into the core of the compression cell to maintain the cushion without reabsorption risks.
- Gravity Separation Architecture: The internal flow passages restrict thermal gravity-circulation currents between the system main and the tank body. This controls the tank temperature lower to prevent air from dissolving back into the system water.
Maintenance Utility: Allows maintenance teams to easily drain water-logged compression tanks and charge them with a fresh atmospheric air pocket during annual testing without having to drain down the rest of the building's main loop lines.
