RED-WHITE VALVE CORP.  |  SKU: 30078517  |  MPN: 3420LRAB 3/4

Tankless Water Heater Isolation Valve Kit | 3420LAB LF Long Body | FNPT x FNPT

$623.93
BTU Rating & Connection Size
  • All-Threaded FNPT x FNPT – Leak-free, solderless brass connections for high-pressure installs
  • 200K/500K BTU Relief – Covers residential and commercial system needs
  • Long-Body Design – Easier access in tight or outdoor installations
  • 600 PSI WOG + AB1953 – High-pressure rated and lead-free certified
  • Color-Coded Handles – Red (hot) and blue (cold) for clear ID

Ensure safety, durability, and high performance with the Red-White Valve Corp Lead-Free Brass Tankless Water Heater Valve Kit. Engineered to meet strict industry standards, this premium valve kit is ideal for residential and commercial plumbing applications, offering reliable isolation and control for your tankless water heater.

Key Features:

  • Lead-Free Construction: Made from ASTM B927 C27450 lead-free brass, complying with the Drinking Water Act (less than 0.25% lead content) and certified in accordance with NSF/ANSI/CAN 61 & 372 standards for safe potable water.
  • High Pressure & Temperature Ratings: Rated for 600 psi WOG (non-shock) with a temperature range of 15°F to 160°F, ensuring dependable performance under demanding conditions.
  • Full Port & Easy Operation: Features a full port design for minimum flow restriction and a ¼ turn operation for quick shut-off.
  • Adjustable & Secure: Includes adjustable packing, a blow-out proof stem, and a T-handle (available in red for hot water and blue for cold water) for easy identification and operation.
  • Versatile & Functional: Equipped with an integral hose end drain/purge valve, an integral relief valve port (available in different relief capacities: 200K, 500K, and 2.7M BTU/hr), and union connections for straightforward installation and maintenance.
  • Robust Materials: Constructed from lead-free brass with durable PTFE and EPDM O-rings for reliable sealing and longevity.

Dimensions & Materials:

  • Size: ¾ inch, with FNPT end x FNPT tailpiece (ASME B1.20.1-NPT)
  • Body & Fixed End: Lead-Free Brass ASTM B927 C27450
  • Ball & Stem: Lead-Free Brass / Chrome Plated
  • Seats & O-rings: PTFE and NSF-approved EPDM
  • Handle & Nut: Aluminum handle with steel/ zinc plated handle nut

Relief Capacities:

  • 3420LRAB: 200K BTU/hr relief
  • 3420LSAB: 500K BTU/hr relief

Certification & Standards:

  • Certified in accordance with NSF/ANSI/CAN 61 & 372
  • Complies with AB1953 lead-free requirements

This valve kit provides safe, efficient, and reliable control of your tankless water heater, making maintenance and operation straightforward and worry-free. Trust Red-White Valve Corp for quality plumbing solutions that stand the test of time.

D i m e n s i o n , W e i g h t

Size Φ [in] ΦSC [in] ΦSL [in] ΦP [in] A* [in] B [in] H [in] Wt.* [lb]
¾” ¾ - 14 NPT ¾ - 14 NPT 0.50 0.73 6.22 / 4.06 2.35 1.66 1.64 / 1.60

* Applies to models 3421LAB / 3422AB

Material

Part Material Specification
Body Lead Free Brass ASTM B927 C27450
Fixed End Lead Free Brass ASTM B927 C27450
Ball Lead Free Brass / Chromium Plated ASTM B927 C27450
Seat PTFE PTFE
Stem Lead Free Brass ASTM B927 C27450
Packing Ring PTFE PTFE
Packing Nut Brass ASTM B124 C37700
T-Handle Aluminum ASTM B85
Handle Nut Steel / Zinc Plated ASTM A36
Handle Screw Steel / Zinc Plated ASTM A36
Handle Aluminum ASTM B85
Union Nut Brass ASTM B283 C37700
Union Lead Free Brass ASTM B927 C27450
O-Ring EPDM Peroxide Cured NSF Approved
Cap Retainer Rubber -
Drain Cap Brass ASTM B283 C37700
Drain Gasket EPDM Peroxide Cured NSF Approved
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