New liner, had green water

katie.e.mccall

Active member
Jul 29, 2023
28
Chattanooga TN
Pool Size
22000
Surface
Vinyl
Chlorine
Liquid Chlorine
Hi-
We are getting our vinyl liner replaced, and the water in the pool has been drained. The pool had green water prior to draining, so I am wondering how to clean/drain/what to do with the pump/piping/filter to get that gross water out. I imagine with the new liner and clean refilled water I will send a bunch of that gross water back in once the pump is back on- is there a way to avoid that by cleaning/draining it now? Or is that just a part of the process and I’ll SLAM it to fix it?

22k gal in ground vinyl liner pool
Hayward sand filter
 
If your returns in the pool have screw on "eyeballs" or other fittings, take one off and see if there is a normal pipe thread inside the open pipe.
I have 3 such in my pool, and they accept standard 1 1/2" treaded fitting from the hardware store. With a few 90 degree elbows and lengths of pipe, you can redirect what comes out to not go back into the pool. I press fit all the pieces together, no need to glue. I use mine to redirect the antifreeze I put in the lines for over the winter, so it doesn't dump into the pool in the spring. You can have one contraption, and clear each line individually using the return valves, or make enough for all your returns and do them all at once.
Put the system on Recirculate, and pump away once the pool is refilled. It will suck clean water in via the skimmers/drains, and whatever was in the lines will come out of the redirected return(s). After all return lines are done, take off the contraptions and backwash your sand filter.
Then back into normal operation. But you probably should still do a SLAM, as even this will not be near 100%.

But honestly - while the above is not hard, it is a bit of overkill for the situation. I'd just get it all running, and do the SLAM. Even if the pool was a dank, alligator infested swamp, there won't be much in the lines/equipment and the SLAM will take care of it. Even though I have the fittings, I'd skip it. 10 gal of antifreeze not in the pool (even though harmless) is one thing. Since I'd have to do it anyway, a brief SLAM is just easier.
 
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Hi-
We are getting our vinyl liner replaced, and the water in the pool has been drained. The pool had green water prior to draining, so I am wondering how to clean/drain/what to do with the pump/piping/filter to get that gross water out. I imagine with the new liner and clean refilled water I will send a bunch of that gross water back in once the pump is back on- is there a way to avoid that by cleaning/draining it now? Or is that just a part of the process and I’ll SLAM it to fix it?

22k gal in ground vinyl liner pool
Hayward sand filter
Prime the pump with filter on Waste setting. Once it is running at full flow… let it run for 30 sec then turn it off and switch to Backwash … leave it there at full flow til backwash sight glass is very clear , usually 2-3 min or so , switch off, turn to Rinse … full flow for 15 seconds , off ..then switch to Filter .. pump on again … good to go.
 
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Hi-
We are getting our vinyl liner replaced, and the water in the pool has been drained. The pool had green water prior to draining, so I am wondering how to clean/drain/what to do with the pump/piping/filter to get that gross water out. I imagine with the new liner and clean refilled water I will send a bunch of that gross water back in once the pump is back on- is there a way to avoid that by cleaning/draining it now? Or is that just a part of the process and I’ll SLAM it to fix it?

22k gal in ground vinyl liner pool
Hayward sand filter
Could blow out the pipes from the pad with a shop-vac or small air compressor but probably not worth the trouble.
 
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