Arrowhead Brass 221LF 22 Serie...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$16.67
Arrowhead Brass 221LF 22 Series 3/4" Male Boiler Drain, Brass Valve

Arrowhead Brass 221LF 22 Series 3/4" Male Boiler Drain, Brass Valve

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Model: 221LF

In Stock (leaves warehouse same day if ordered before 3pm ET)

$16.67
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Arrowhead Brass 221LF 22 Series 3/4" Male Boiler Drain, Brass Valve

The Arrowhead Brass 221LF is a 3/4" male-threaded boiler drain valve from the 22 Series, engineered for rough-in plumbing applications where a low-profile, quarter-turn shutoff is needed for draining boilers, water heaters, and hydronic heating systems. The 22 Series lineup covers two closely related models — the 221LF and the 223LF — both sharing the same brass body construction, quarter-turn operation, and rough-in intent, with connection style being the point of differentiation across the pair. This 221LF variant installs directly into a 3/4" male threaded connection, giving plumbers and contractors a compact, reliable point of service for system drain-down and maintenance work. As a boiler drain, the 221LF is designed to be installed behind the wall or at the base of mechanical equipment where a dependable, low-lead brass valve is required for professional rough-in work.

Key Features

  • Trade Size: 3/4" male threaded connection for direct installation into standard boiler, water heater, and hydronic system fittings.
  • 22 Series Design: Compact quarter-turn boiler drain configuration built for straightforward system drain-down and routine maintenance access, available across the 221LF and 223LF models in the series.
  • Male Connection Type: Male-threaded (MIP) end connection allows the valve to thread directly into a matching female fitting without additional adapters.
  • Brass Construction: Brass valve body provides a durable, corrosion-resistant point of service for rough-in and mechanical room installations.
  • Quarter-Turn Operation: Simplifies on/off operation for technicians performing routine system draining and service work.
  • Low-Profile Rough-In Fit: Designed to sit flush behind walls or at the base of mechanical equipment for a clean, accessible service point.

Technical Specifications

  • Product Type: Boiler Drain Valve
  • Series: 22 Series
  • Trade Size: 3/4"
  • Connection Type: Male Threaded (MIP)
  • Material: Brass
  • Model Options: 221LF, 223LF

Typical Applications

  • Boiler and Hydronic Heating System Drain-Down
  • Water Heater Service and Maintenance Access
  • Mechanical Room Rough-In Plumbing
  • Residential and Commercial Heating System Installations
  • Renovation and New Construction Mechanical Work

Why Arrowhead Brass?

Arrowhead Brass builds the 221LF boiler drain with a solid brass body for dependable performance in demanding mechanical room and rough-in environments. The 3/4" male-threaded, quarter-turn design gives plumbers and contractors a straightforward way to service boilers, water heaters, and hydronic systems without complicated hardware. Backed by the broader 22 Series lineup, Arrowhead Brass gives installers a consistent, dependable choice for rough-in drain valves. Choose Arrowhead Brass for rough-in valves built to stand up to the daily demands of professional plumbing work.

Manufacturer Resources

Product Specs

list_batch:
ARR-20260924
Product Type:
Boiler Drain Valve
Connection Type:
Male Threaded (MIP)
Configuration:
Quarter-Turn
Series:
22 Series
Department:
Plumbing
Product Subgroup:
Fittings and Valves
Product Material:
Brass
Product Size:
3/4"

Arrowhead Brass 221LF – Frequently Asked Questions

1) What sizes does the Arrowhead Brass 22 Series boiler drain come in?
Two male-threaded trade sizes are offered on the 22 Series boiler drain: 1/2 inch MIP and 3/4 inch MIP. Both are brass-bodied quarter-turn drains with the same rough-in intent, so the only decision is which thread size matches the tapping on your boiler, water heater, or hydronic fitting.
2) Do I need an adapter to install this Arrowhead Brass boiler drain?
No adapter needed if you are threading into a female port. The valve has a male threaded (MIP) end, so it screws straight into a matching female fitting on the boiler, tank, or hydronic manifold. If the opening you are working with is male, you would need a coupling or a female-inlet drain instead.
3) What is the difference between the Arrowhead 221LF and 223LF?
Both are 22 Series brass quarter-turn boiler drains with the same body and the same rough-in purpose. The connection is the point of difference across the pair, so pick by the thread size the opening calls for rather than expecting any change in valve construction or operation.
4) Can this boiler drain be used behind a wall or in a tight mechanical room?
That is what it is built for. The 22 Series drain is a low-profile rough-in valve intended to sit flush behind a wall or at the base of mechanical equipment, so it works as a permanent service point in mechanical rooms and in new construction or renovation rough-in where there is little clearance.
5) Why brass for a boiler drain instead of a plated or plastic valve?
The body is brass, which holds up to the heat and moisture of a mechanical room and resists corrosion at a fitting that spends years closed and then gets opened under pressure. For property managers standardizing drain points across a building, an all-brass valve is the part you can leave in place through multiple service cycles.
6) What jobs is the Arrowhead 22 Series boiler drain actually used on?
Boiler and hydronic loop drain-down, water heater service and maintenance access, and general mechanical room rough-in on both residential and commercial heating systems. It serves as the dedicated drain point you open to empty a system before service, not as a throttling or flow-control valve.
How fast can I get the Arrowhead Brass 221LF delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Arrowhead Brass 221LF come with a warranty?
Absolutely. The Arrowhead Brass 221LF is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Arrowhead Brass 221LF?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Arrowhead Brass 221LF from ZenSupply?
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