the 25-601-00 comes standard with a 1/4" needle drain in the lower arm

When you're servicing commercial burners or fireplace units

such as the Watts GC230

necessitating a manual intervention to resume firing

Durable Construction: Built to withstand constant thermal cycling within the heat exchanger vestibule without drift or premature fatigue

ASCO 8321G2 Solenoid Valve 326070-701 the 25-601-00 comes standard withThe ASCO 8321G2 Solenoid Valve is a high performance 3 way normally closed pilot operated valve designed for rapid cycling and industrial efficiency. Engineered with a 3 8" NPT connection and a rugged brass body, this 120V AC solenoid valve provides a quick exhaust feature that significantly reduces cylinder return times in pneumatic systems. It operates within a 10 200 PSI pressure range and is compatible with air, water, and light oil. The inclusion