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3420RAB/TAB LF Tankless Water Heater Valve Kit

Virgin PTFE Seats

Integral Base Drain

Purge Port V/Cap

Integral Relief Valve

– RAB: 200K BTU/hr Relief

– TAB: 2.7M BTU/hr Relief

AB1953, NSF-61 & NSF-372


Spec Sheet


Product Number Type Category Body Connection Class Size
3420AB Tankless Isolation Kit Lead free Low Lead Brass FNPT x FNPT 600# WOG 3/4" - 1"
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause birth defects or other reproductive harm. For more information, go to

Additional information



Lead Free