rtbarton Posted January 27, 2006 Share Posted January 27, 2006 I'm looking at pressure switches in the Machine Mart catalogue, the device used to stop & start the motor and relieve pressure from the pump when the motor stops. There are 2 types listed, 1 port and 4 port. To what does the number of ports refer? Thanks in anticipation Quote Link to comment Share on other sites More sharing options...
simonb Posted January 27, 2006 Share Posted January 27, 2006 The body of the switch either has 1 or 4 holes in it. The 4 hole one saves on the plumbing as one connection goes to the tank, one usually has a safety pressure vent, the 3rd has a pressure gauge on it and the 4th is blanked off - thats how my mains compressor one is plumbed up Quote Link to comment Share on other sites More sharing options...
rtbarton Posted January 27, 2006 Author Share Posted January 27, 2006 The body of the switch either has 1 or 4 holes in it. The 4 hole one saves on the plumbing as one connection goes to the tank, one usually has a safety pressure vent, the 3rd has a pressure gauge on it and the 4th is blanked off - thats how my mains compressor one is plumbed up Thanks Simon - that makes sense when I look at my compressor now. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.