Is this a direct replacement for Fasco or other brands

used extensively in 155

a sudden drop in hot water volume

If you detect rollout at the burners

Dwyer Instruments 2015 Pressure Gage 320735-701 Is this a direct replacementThe Dwyer Magnehelic 2015 is the industry standard for measuring differential pressure in HVAC systems and cleanroom environments. Designed for 0 15. 0" w. c. ranges, this gage utilizes a frictionless Magnehelic movement that eliminates wear and hysteresis, ensuring consistent accuracy within 2% of full scale. The 4" diameter dial face provides clear visibility for monitoring air or non combustible gases, while the die cast aluminum housing handles