Boost Switch/Relay source?
Thread Starter
TECH Fanatic
Joined: Nov 2001
Posts: 1,986
Likes: 1
From: Centrifugal City
Boost Switch/Relay source? If I want my external pump to come in when under boost, is there a good switch (adjustable?) to turn it on?
Think my Boost-A-Pump switch comes on at 3psi. I'd like my external 2nd pump to start around 0-1 psi or so.
Anyone have part numbers or a source for this?
Am doing some searches and bumping into references to a hobbs or hobbes switch. How reliable/sensitive are they? Any links to purchase? Found a link to a 5psi Hobbs switch at Summit, but would like something that engages at a lower boost level.
Trying to decipher page 4 & 5 on this doc:
http://content.honeywell.com/sensing...scorp/P3_6.pdf
Do I want p/n 78629 or 78633?
What is N.O. vs. N.C. ?
TIA!
Think my Boost-A-Pump switch comes on at 3psi. I'd like my external 2nd pump to start around 0-1 psi or so.
Anyone have part numbers or a source for this?
Am doing some searches and bumping into references to a hobbs or hobbes switch. How reliable/sensitive are they? Any links to purchase? Found a link to a 5psi Hobbs switch at Summit, but would like something that engages at a lower boost level.
Trying to decipher page 4 & 5 on this doc:
http://content.honeywell.com/sensing...scorp/P3_6.pdf
Do I want p/n 78629 or 78633?
What is N.O. vs. N.C. ?
TIA!
Last edited by MelloYellow; Nov 5, 2004 at 05:15 PM.
Thread Starter
TECH Fanatic
Joined: Nov 2001
Posts: 1,986
Likes: 1
From: Centrifugal City
