Conbraco 17-402-04 Relief Valve The board includes a replaceable

The board includes a replaceable automotive-style fuse to protect the low-voltage transformer from shorts

Designed for use with 1/4" OD polytubing

or specific diagnostic blink codes on the furnace control board indicating a pressure switch circuit failure

Smith water heaters or Lochinvar Knight and Armor series units

Its bimetallic sensing element provides a rapid response to temperature fluctuations

Conbraco 17-402-04 Relief Valve The board includes a replaceableThe Conbraco 17 402 04 Relief Valve is a high capacity, pressure only safety device engineered specifically for hot water heating boilers and hydronic systems. Featuring a rugged cast bronze body and a 3 4 inch MNPT inlet x 3 4 inch FNPT outlet, this ASME Section IV certified valve is factory set to 150 PSI. It provides critical protection against thermal expansion, supporting systems with a discharge capacity up to 934,000 BTU HR. Designed for