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haws|SKU:6521FR

Haws 6521FR Pneumatic Freeze-Resistant In-Wall Valve

Year-Round Freeze Protection for Wall-Mounted Drinking Fountains

Year-round fountain operation — Works in freezing outdoor conditions
Pneumatic valve engineering — Fully engineered system with reliable actuation
Interior wall installation — Mounts inside where temp stays above 50°F
Automatic drain-back design — Residual water clears from supply line
Fully serviceable construction — Accessible design for year-round maintenance
  • Engineering documentation package -- Spec sheets, AutoCAD drawings, and parts breakdown included

Original price was: $1,781.00.Current price is: $1,375.15.

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6521fr-003
Haws 6521FR Freeze-Resistant In-Wall Valve for Single Wall-Mounted Drinking Fountains
$1,781.00 Original price was: $1,781.00.$1,375.15Current price is: $1,375.15.

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In the box

  • Haws 6521FR valve assembly
  • Spec sheet
  • Installation drawing
  • Parts breakdown drawing
  • Operational & maintenance manual
6521fr-003
Haws 6521FR Pneumatic Freeze-Resistant In-Wall Valve
$1,781.00 Original price was: $1,781.00.$1,375.15Current price is: $1,375.15.

Year-Round Freeze Protection for Wall-Mounted Drinking Fountains

The Haws 6521FR is a vetted, fully engineered pneumatic valve system designed for interior wall installation where ambient temperatures stay above 50°F (10°C). When the valve closes, residual water in the supply line drains back into the waste line inside the cabinet, preventing freeze damage to the exterior fountain. This investment in craftsmanship ensures your single bubbler wall-mounted drinking fountain operates reliably through freezing conditions year-round. Every unit is curated for long-term performance and backed by a limited warranty.

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Pneumatic Operation
Drain-Back Freeze Protection
Year-Round Exterior Use
Fully Accessible Design
50°F
Minimum Ambient Temperature
2 Weeks
Ship Lead Time
Year-Round
Exterior Fountain Operation
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Engineered Drain-Back Prevents Freeze Damage

The Haws 6521FR eliminates the risk of frozen supply lines through its pneumatic-operated drain-back mechanism. When the valve closes, residual water between the valve and bubbler drains into the waste cabinet inside the wall. This curated design means no standing water in exposed sections during freezing temperatures, which is the primary cause of cracked fittings and failed valves on exterior fountains. Unlike generic replacements from big-box stores, this system is purpose-built for freeze protection, protecting your investment against costly winter failures.

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Interior Installation Shields Critical Components

This valve installs on the interior wall where ambient temperature remains above 50°F (10°C), keeping all sensitive pneumatic components in a climate-controlled environment. The exterior fountain continues operating normally even when outdoor temperatures drop well below freezing. This separation of valve mechanism from exposure is what allows consistent, year-round operation without seasonal shutdowns or heat-tape workarounds. The fully accessible interior placement also means routine maintenance and service can be performed without outdoor ladder work or weather delays.

6521fr-003

Complete Documentation for Confident Installation

Every Haws 6521FR ships with a full engineering documentation package including spec sheets, installation drawings, parts breakdown diagrams, operational and maintenance manuals, and AutoCAD installation drawings. For spec-conscious buyers and facilities teams, this level of documentation removes guesswork during planning and installation. You get exact dimensional references and assembly sequences verified by Haws engineers, not generic instructions. Water Station includes these materials because proper installation directly affects long-term performance and freeze-resistance capability.

Compatibility Check

Verify these conditions before ordering to ensure a proper installation.

  • Interior installation area maintains minimum 50°F (10°C) ambient temperature
  • Fountain is a Haws single bubbler wall-mounted freeze-resistant model
  • Wall cavity depth accommodates in-wall valve and drain-back waste piping

Ideal Applications

Designed for facilities that need reliable outdoor hydration in climates where temperatures drop below freezing.

School Campuses
Commercial Building Exteriors
Industrial Facilities

Full specifications

At a glance

Warranty
Limited Warranty
Full specifications5 data points across 4 categories

Dimensions

Installation LocationInterior wall (in-wall)

Power & Performance

Operation TypePneumatic-operated
Minimum Ambient Temperature50°F (10°C)

Materials

ConstructionSee product page

Compliance & Warranty

WarrantyLimited Warranty

The Water Station Promise

Every product we carry earns its place on our shelves.

Free ShippingShips free to your door with no conditions or minimums.
30-Day Hassle-Free ReturnsIf it doesn't fit your project, send it back within 30 days.
Vetted for PerformanceWe only stock products that meet real-world build quality and reliability standards.

Product Description

Model 6521FR, fully engineered pneumatic-operated valve system installed on the inside wall where room temperature does not drop below 50° F (10° C). When valve goes to off position, water left in supply line between valve and bubbler drains back into waste inside cabinet. Allows fountain on outside to function year-round.

Lead Time: Ships in 2 weeks.
A brief wait ensures you receive a product engineered for decades of performance.

Features

The Haws 6521FR freeze-resistant valve system is a fully engineered pneumatic operated valve for use on all Haws single bubbler wall mounted freeze-resistant fountains. The placement of the valve on an interior wall where the ambient temperature minimum is 50° F (10° C) allows the system to function when freezing conditions are present at the fountain outside the wall. Its fully accessible design allows for reliable service year round.

  • Installed in an area where the temperature remains at a minimum of 50° F (10° C), this unit will assist the fountain in remaining fully functional in freezing conditions
  • If a maintenance issue ever arises, rest assured that the valve system is easily accessed, making troubleshooting simpler
  • Flow is easily adjustable with supplied regulator valve
  • Unit is applicable for single bubbler wall mounted freeze-resistant fountain designs

Haws manufactures drinking fountains, faucets and electric water coolers to be lead-free by all known definitions including NSF/ANSI/CAN 61- Section 9, NSF/ANSI/CAN 372, California Proposition 65, and the Federal Safe Drinking Water Act. Product is compliant to California Health and Safety Code 116875 (AB 1953-2006), and NSF/ANSI/CAN 61: Q ≤ 1.

Certifications

  • CSA Certified
  • NSF/ANSI/CAN 61-2020 with Q ≤ 0.5

Warranty & Return Policy

Limited Warranty

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About haws Freeze-Resistant Valves

haws is a trusted manufacturer of premium freeze-resistant valves. WaterStation is an authorized dealer offering the full haws lineup with free delivery, price match guarantee, and expert support.

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