Jun 12, 2014
309
Sharpsville, IN
It has been a horrible pool season for me today the least …

Fine on filter
Fine on rinse
Fine on waste

Backwash? High pressure and no water movement.

I’ve remove MPV and moved the sand around in case of possible sand hardening or channeling.

Nodda.

HELP!!
 
It has been a horrible pool season for me today the least …

Fine on filter
Fine on rinse
Fine on waste

Backwash? High pressure and no water movement.

I’ve remove MPV and moved the sand around in case of possible sand hardening or channeling.

Nodda.

HELP!!
What is attached to the backwash port? Is the MPV broken at the stem? Is there a valve in the backwash line? Is that line a hose with a kink or restriction of some kind? If you remove the plumbing from the backwash port does water spray out when the valve is in that position and the pump running? When the valve is put in the waste position and the pump on does water come out into the backwash line?
 
What is attached to the backwash port? Is the MPV broken at the stem? Is there a valve in the backwash line? Is that line a hose with a kink or restriction of some kind? If you remove the plumbing from the backwash port does water spray out when the valve is in that position and the pump running? When the valve is put in the waste position and the pump on does water come out into the backwash line?
Backwash port as in the discharge line? Hard plumbed PVC. Nothing broken. I can’t remove the plumbing nor would I would the pump running lol

Yes water in backwash line during waste.
 
Backwash port as in the discharge line? Hard plumbed PVC. Nothing broken. I can’t remove the plumbing nor would I would the pump running lol

Yes water in backwash line during waste.
If you removed the MPV to clean the sand, that line should be able to be disconnected. I also never glue pipes in the backwash line, no need as a little leak won't harm anything and the water gets thrown away anyway.
At what speed are you trying to backwash. If water flows with the valve in waste, but not backwash, the pump may need to run faster. It has to get that 500-600 pounds of wet sand moving to backwash.
What pump are you using? A.O Smith makes motors not pumps. I have never seen a 3/4hp variable-speed motor on an inground (or above ground) pool pump.
 
If you removed the MPV to clean the sand, that line should be able to be disconnected. I also never glue pipes in the backwash line, no need as a little leak won't harm anything and the water gets thrown away anyway.
At what speed are you trying to backwash. If water flows with the valve in waste, but not backwash, the pump may need to run faster. It has to get that 500-600 pounds of wet sand moving to backwash.
What pump are you using? A.O Smith makes motors not pumps. I have never seen a 3/4hp variable-speed motor on an inground (or above ground) pool pump.
Everything was hard plumbed when we bought the house so I’m leaving well enough alone until I can no longer. The pump only has one speed and has worked just fine for all settings until the last couple days.
 
Everything was hard plumbed when we bought the house so I’m leaving well enough alone until I can no longer. The pump only has one speed and has worked just fine for all settings until the last couple days.
Hard to help if we aren't talking about the same pool. Your post:

"It has been a horrible pool season for me today the least …

Fine on filter
Fine on rinse
Fine on waste

Backwash? High pressure and no water movement.

I’ve remove MPV and moved the sand around in case of possible sand hardening or channeling.

Nodda.

HELP!!"
 
Hard to help if we aren't talking about the same pool. Your post:

"It has been a horrible pool season for me today the least …

Fine on filter
Fine on rinse
Fine on waste

Backwash? High pressure and no water movement.

I’ve remove MPV and moved the sand around in case of possible sand hardening or channeling.

Nodda.

HELP!!"
We are talking about the same pool. I can pull the MPV off the top of the filter but it is hard plumbed in so it can’t be removed completely - it is set to the side still attached to the plumbing so you can access inside the filter tank.
 

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