Craftsman Jet Pump Shallow Well
#1
11-22-15, 09:10 PM
Craftsman Jet Pump Shallow Well
Hello,
I have a Craftsman Jet Pump model 390.250254 with a Flotec 2 gallon inline pre-charged tank. The equipment was already installed when I purchased my house, but the previous owner says it worked for him to help irrigate the lawn. I have never operated a shallow well pump and am looking to prime the pump to see if it still works. I believe that the inline tank is screwed into the priming port. Therefore, in order to prime, do I need to unscrew the pre-charged tank? If so, are there any dangers in removing the tank? Lastly, once I have primed the pump, can I then re-install the tank? Thank you for your help!
I have a Craftsman Jet Pump model 390.250254 with a Flotec 2 gallon inline pre-charged tank. The equipment was already installed when I purchased my house, but the previous owner says it worked for him to help irrigate the lawn. I have never operated a shallow well pump and am looking to prime the pump to see if it still works. I believe that the inline tank is screwed into the priming port. Therefore, in order to prime, do I need to unscrew the pre-charged tank? If so, are there any dangers in removing the tank? Lastly, once I have primed the pump, can I then re-install the tank? Thank you for your help!
#2
11-22-15, 10:30 PM
Group Moderator
Welcome to the forums.
It would be easier to help you if you could take a picture or two and post them here for us.
http://www.doityourself.com/forum/el...-pictures.html
It would be easier to help you if you could take a picture or two and post them here for us.
http://www.doityourself.com/forum/el...-pictures.html
#3
11-23-15, 08:31 AM
Group Moderator
The tank should have a rubber bladder inside separating air and water. When you unscrew the tank the bladder will prevent the air pressure inside from escaping.
Once you get the pump running it is a good idea to correctly set the air pressure in the tank if your system has a pressure switch. With the pump off and zero water pressure the air in the tank should be 2-3 psi less than the pumps cut in (turn on) pressure.
Once you get the pump running it is a good idea to correctly set the air pressure in the tank if your system has a pressure switch. With the pump off and zero water pressure the air in the tank should be 2-3 psi less than the pumps cut in (turn on) pressure.
