the S1-331-03009-000 is the direct manufacturer-specified upgrade for the discontinued 50A51-242 model

technicians should inspect the entire bank for integrity

The HVAC high pressure cutout is calibrated to trigger at 375 PSI

Common Questions & Technician Notes

What size damper can the M9108-GGC-2 handle

Armstrong International 15B4 Trap R-410A the S1-331-03009-000 is the directThe Armstrong International 15B4 Trap is a high performance Series B Cast Iron Float & Thermostatic Steam Trap engineered for heavy duty industrial and commercial heating applications. Designed with a 1" NPT Standard Connection and a 5 16" orifice, this unit excels in managing high condensate loads while maintaining a maximum operating pressure of 15 PSI. Featuring an integrated thermostatic air vent, the 15B4 ensures rapid air removal for quick