McDonnell & Miller 250-3/4-30 Valve 30067439-890 If your furnace ignites but

If your furnace ignites but shuts down after a few seconds

The Reznor 116043 Pressure Tap is a critical OEM replacement part engineered for precise manifold and gas pressure diagnostics within Reznor unit heaters and furnaces

Frequent tripping is usually a symptom of airflow issues

Interchangeable Design: Fully compatible with both 168072 and QC-1 part numbers

McDonnell & Miller 250-3/4-30 Valve 30067439-890 If your furnace ignites butThe McDonnell & Miller 250 3 4 30 (Part Number 181225) is a high capacity 3 4" NPT pressure relief valve engineered specifically for hydronic heating systems and storage tanks. Rated for a set pressure of 30 PSI and a substantial 790,000 BTU capacity, this valve provides critical over pressure protection by utilizing a fail safe spring loaded mechanism. Its heavy duty bronze body and seat, paired with an EPDM rubber diaphragm, ensure resilient