Navien Bypass T Adapter (A) / Blue-Thermostat (Clip) 30003411B
NR/NP/NP240/NP-240-180/210/240 (Thermostat Included) NSF O-Ring
(Old Part Number BH2501639B)
FOR MODELS:
NPNP180NP240NP240ANP-240NP-240ANRNR180NR-180NR180ANR-180ANR210NR-210NR210ANR-210ANR240NR240ANR-240NR-240A