Pumping Water Out of Pool - Help/Tips?

hollywoodfrodo

Silver Supporter
Feb 20, 2018
187
0
Lakewood, CA
#1
I want to empty some of the High CH Water out of the pool before we get rain so I can lower the CH - not a lot of course, just enough to allow for the rainwater to refill. Our system has a manual valve located after the filter that when opened has a pipe that leads to the house drainage system.

Is there anything special I need to do to use this? Of course no one from the Pool company showed or told us anything specific about it at the time of the build. Do I just turn the pump on (assuming a lower rate) and turn that valve and let the water flow until it gets to the level I want then turn the pump off?

And what is the correct order of event for opening that valve up, turning on pump, turning off pump, closing the valve?

Thanks for any help!
 

Rocket J Squirrel

Bronze Supporter
Jun 8, 2018
233
0
Alamo, CA
#2
By "house drainage system" do you mean outdoor drains channeling away rainwater to storm drains, or the house's line to the sewer system? Many localities in CA prohibit discharge of pool water into the storm drain system. The sewer line is generally OK to use.
 

hollywoodfrodo

Silver Supporter
Feb 20, 2018
187
0
Lakewood, CA
#3
By "house drainage system" do you mean outdoor drains channeling away rainwater to storm drains, or the house's line to the sewer system?
Yeah, it's all to code and passed inspections so it's going where it's supposed to - the sewer system.

I'm more wondering about the correct way to do my part which is turning the valve and running the pump since it's something I've never done before.
 

mknauss

Mod Squad
May 3, 2014
11,884
2
Laughlin, NV
#4
Start your pump and open the valve. You may need to pinch back a valve on your returns to force more out the hose bib. It will not be much out of that bib, maybe 7-10 GPM, at most.
 

hollywoodfrodo

Silver Supporter
Feb 20, 2018
187
0
Lakewood, CA
#5
Start your pump and open the valve. You may need to pinch back a valve on your returns to force more out the hose bib. It will not be much out of that bib, maybe 7-10 GPM, at most.
Okay - that's what I was wondering about - it seemed to me like the way it was designed it wouldn't pump all the water out of that pipe but just allow some of it to go that way while much of it would still go through the normal return, but I wasn't exactly sure since I hadn't done it. Thanks for the clarification.

When you say "pinch back a valve", do you mean just adjust the actual return eyelet into the pool to make it smaller/give more resistance?
 

mknauss

Mod Squad
May 3, 2014
11,884
2
Laughlin, NV
#6
Do you have a valve on your return line to the pool? If not, then you will be hard pressed to get much out of the hose bib.

This is where a small, inexpensive sub pump comes in handy. You might consider that. They can be purchased from Harbor Freight, Home Depot, Amazon, etc for under $100.
 

hollywoodfrodo

Silver Supporter
Feb 20, 2018
187
0
Lakewood, CA
#7
Hmmm... Maybe I didn't paint a good picture. I'll try to post some pics which I'm sure would help, but I don't think I have any super good ones. I'm not talking about using the hose bib. We do have a hose bib, located right after the pump itself and before the pipe that goes into the filter. But then after the filter there is a T pipe with one side going into the heater and SWG and pool and the other pipe going straight into the ground. The pipe that goes into the ground has a valve on it (manual blue knob valve) which is closed, but when opened has underground pipe that goes into the house sewer drainage system - that's the one I'm talking about using as my understanding is that is the sole purpose of it - to allow draining the pool if necessary.

1-Pipe.jpg

2-Pipe.jpg
 

mknauss

Mod Squad
May 3, 2014
11,884
2
Laughlin, NV
#9
OK -- that changes things. Open it. If you see a pretty good drop in your pool level, then great. If not, you can pinch off the flow using the three way valve I see on your return line.
 

hollywoodfrodo

Silver Supporter
Feb 20, 2018
187
0
Lakewood, CA
#12
Will do. Only looking to drain about 1/2 inch or thereabouts so shouldn't get lower than skimmer, but we do have a floor drain so I can switch to that beforehand just to be on the safe side.
 

kimkats

Mod Squad
LifeTime Supporter
Jul 11, 2012
35,532
6
Tallahassee, FL
#13
If you are anything like me set a timer for 30 mins and wear it around your neck so you don't forget to check the water. Time tends to get away from me so................better safe than sorry!
 

hollywoodfrodo

Silver Supporter
Feb 20, 2018
187
0
Lakewood, CA
#14
So far nothing is working. I opened the valve and had the pump running, but it seems like because water can still flow through the normal returns, it is. And not enough water/pressure is going through the drain pipe to drain anything. The only valves we have on the return lines are to switch from the standard pool returns to the water wall and for the pool returns switch from the wall to the floor returns. I tried switching to the floor returns but that had no effect. I tried the pump at normal run speed and at higher speed but no change.

Not sure what else to do to force the water to go through the drain pipe.
 

mknauss

Mod Squad
May 3, 2014
11,884
2
Laughlin, NV
#15
The upper three way valve on the return. You might have to remove the handle to get past a stop on the valve body but you should be able to partially close off the returns. Just do not dead head the pump.