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Check valve may prevent comp. from starting due to high back pressure on pump piston.The hiss you hear at shut-off is a back-pressure purge valve.
The post purge is connected and works well. It just takes longer then usual to fully discharge due to the long round pipe .
Check valve may prevent comp. from starting due to high back pressure on pump piston.
The hiss you hear at shut-off is a back-pressure purge valve.
The post purge is connected and works well. It just takes longer then usual to fully discharge due to the long round pipe .