Drain & refill dangers?


LifeTime Supporter
Ok, so I've been in my home for a year. Now that summer is approaching, I did a CYA test & it was through the roof, (over 100) & my chlorine is getting eaten away with the bright sun.

So instead of countering every bad chemical reading by adding more chemicals, and since I have no idea how old the water is, or how/if it was kept up, I figure a complete drain & refill would give me a fresh re-start for the summer and I'll know exactly what's in my pool water.

Here's my problem: I heard that, as the pool is draining, there's a danger of the pool plaster actually lifting off the ground underneath & creating a gap, so that when I refill, the weight of the water will crack the plaster.

Anyone heard of this happening? How often should an IG pool be drained & refilled?


TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
Silver Spring, MD
You are probably alright then. There is only a risk of the pool lifting up if the ground water table is higher than the bottom of the pool. At the same time, you probably don't really need to replace 100% of your pool water, so you could hedge your bets and leave perhaps 1/4 of the water in the pool as insurance.


TFP Expert
LifeTime Supporter
Nov 5, 2008
How about water restrictions? I thought that some parts of CA had limits on water usage. Or super high rates if you use a lot at one time.


LifeTime Supporter
Yup.. I'l be checking on that too. I already figured I'd be paying quite a bit for the refill. As of recent, L.A. is under pretty strict usage rules. But as far as I know, in my city, about 90 miles NE of L.A., there's water-saving incentives, but no water restrictions--yet. That may change in the summer months though.

Bama Rambler

Mod Squad
TFP Expert
LifeTime Supporter
Jun 22, 2009
SouthWest Alabama
I'm surprised that Bruce (Simicrintz) hasn't jumped in here yet, so I'll give him a plug.

You might want to look into Reverse Osmosis treatment for your water. It might work out to be comparable with draining and refilling and none of the worries associated with draining.


Well-known member
Feb 18, 2010
Houston, TX
The RO systems you can buy aren't designed to handle that kind of a load, so if you wanted to go that route, you'd have to have pros handle it.