What are the advantages of a cast iron sheave

Unlike traditional spring-loaded components

Whether you are servicing a standard 143-80-1 or an internal relief 143-80-2 model

it is rated for both R404A and R507A

Resideo PV075 Eliminator 323055-751 What are the advantages ofThe Resideo PV075 Eliminator is a high performance 3 4" NPT air vent designed for critical air removal in hydronic heating and cooling systems. Built for professional contractors, this automatic air vent utilizes a reliable float mechanism to purge air pockets that cause system noise and component corrosion. The Resideo Braukmann PV Series handles a maximum pressure of 150 PSI and temperatures up to 240F, making it suitable for high demand residential