Accidentally deadheaded one of my pumps. Valves were closed at the feed and the filter input. The water in the pump output pipe got hot enough to swell and break glue seals. I replaced the damaged pipe and hoped for the best. The pump started and ran ok, but the flow is nowhere near what it was before. I separated the pump from the motor checking for a damaged impeller but everything looked fine. Any suggestions?
Low flow after overheat/deadhead
- Thread starter roblectric
- Start date
Check the fitting in the suction port of the pump, lid o ring, and pump seal, the usual suspects. Also ck the plugs in the pump pot
All seals check ok. The pump basket has finally primed full with no air bubble. My pressure guage was bad so I replaced it and found that backwash, recirc,and filter were operating at 28psi. Waste and rinse were 15psi.
This pump recirculates water back to the main pool through 10 pop up infloor cleaners, a rock bubbler, and waterfall. Isolating either of those features does not change the psi. Logic makes me point a finger at the filter but I just installed it last year without any of these issues.
Any suggestions to pinpoint the issue are appreciated.
This pump recirculates water back to the main pool through 10 pop up infloor cleaners, a rock bubbler, and waterfall. Isolating either of those features does not change the psi. Logic makes me point a finger at the filter but I just installed it last year without any of these issues.
Any suggestions to pinpoint the issue are appreciated.
- Jul 21, 2013
- 53,562
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
What PSI are you getting?
Can you list all the things you specifically checked or changed on your pump?
Can you list all the things you specifically checked or changed on your pump?
All seals checked for leaks and relubed. Impeller inspection was normal. Prime rpm and full rpm change as program dictates. Prime rpm is 2500 @15psi. Normal operating rpm 3450 @ 28psi. Waste and rinse = 15psi. Filter, recirc, and backwash @30psi.
I did not disassemble the multiport valve for inspection due to the difficulty with the assembly process. Arthritis sucks.
Filter is a Hayward 256T. Pump is Jandy Intelliflo 1.5hp
I did not disassemble the multiport valve for inspection due to the difficulty with the assembly process. Arthritis sucks.
Filter is a Hayward 256T. Pump is Jandy Intelliflo 1.5hp
- Jul 21, 2013
- 53,562
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Your low flow is unlikely to be in the MPV.
I suspect something in the pump wet end warped from the overheating.
Where was the damaged pipe located?
Post pics showing us your pool equipment and which glue seals broke.
I suspect something in the pump wet end warped from the overheating.
Where was the damaged pipe located?
Post pics showing us your pool equipment and which glue seals broke.
If the pump is suspect, I will swap it with my other identical pump and see if the high pressure moves with it.
Will post pics later.
Kind of embarrassed to show the work of an amateur plumber.
Will post pics later.
Kind of embarrassed to show the work of an amateur plumber.
- Jul 21, 2013
- 53,562
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
You are correct JW. Thanks for the help.The pump can be ruled out. The swap changed nothing.
Now thinking of some king of restriction to flow on the return side of the filter. The infloor cleaner distribution head
is now suspected of dodgy behavior. If debris somehow made it's way in there, it's possible the screen is clogged.
Any other suggestions are welcome.
Maybe that motorized diverter valve is not working properly. Try to remove the motor portion and manually move the valve.