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Duotone terrace — saffron brief on the left, garden-folded ledger on the right.
75" WC SPST 1/4" barb connection Pressure Switch
5 inch water column output during the firing sequence for optimal thermal performance and safety
It is also documented for use in some 78 and 86 Series models
Operating within a 300°F to 700°F temperature range
and BDP350 series
McDonnell & Miller 51-HD Mechanism 30067439-890 75" WC SPST 1/4" barbThe McDonnell & Miller 51 HD Mechanism (Part Number 134900) is a heavy duty mechanical water feeder designed for low pressure steam and hot water boilers. Engineered for high capacity applications, this replacement water feeder head maintains precise water levels in vessels with a maximum pressure of 35 PSI. As a veteran technician knows, the heavy duty 51 HD series is built to withstand more demanding cycles than standard residential feeders,