Pond Leak


Joined
Sep 14, 2018
Messages
576
Reaction score
94
Location
Georgia
Hardiness Zone
8
Country
United States
I have a leak in the liner about 2" below full.I want to lower the water level and use [Pond Shield or Flex Seal] Don't know which is the better choice?
Has anyone used any of these products?
 
Ad

Advertisements

Joined
Oct 28, 2013
Messages
10,455
Reaction score
10,754
Location
Northern IL
Showcase(s):
1
@420benz I'm assuming you can see a visible tear or hole in your liner? I would not recommend either of these products. I think the best way to fix a visible hole or tear is with a scrap piece of liner and some PL roofing sealant. Clean the spot really well, slather on the goop and lay that piece of liner over the hole. Another option is an EPDM repair kit - same concept. You'll get the sealant and some pieces of EPDM to place over the hole or tear.
 
Joined
Nov 28, 2017
Messages
2,533
Reaction score
1,752
Location
North Oklahoma
Hardiness Zone
7a
Country
United States
From what I’ve gathered from those who’ve tried it, flex seal comes off fast, especially in sun.
 
Joined
Jul 12, 2009
Messages
2,285
Reaction score
1,416
Location
Mount Pocono, Pennsylvania
Hardiness Zone
6a
Good advice so far.

Clean it real good. I would use alcohol.

You have already done the hardest part...finding the tear.

As stated, some members have had good results using PL-S30 which comes in a tube that fits your caulking gun. Spread the PL, and slap a scrap piece of liner on it. If possible, clamp it between two pieces of wood overnight.

If your liner is in fact EPDM rubber, you can buy a specific EPDM patch kit which will probably include a patch, primer and glue. Be sure it's EPDM. Using an EPDM patch kit on a different material most likely will result in failure.

Good luck.
I hope your tear is small and you get it patched up good and permanent.

Let us know how you make out.
 
Joined
Apr 24, 2014
Messages
501
Reaction score
385
Location
Franklin, Wisconsin
Hardiness Zone
Zone 5b
The patch kit is probably your best bet. I used a kit to repair a hole chewed by some little critter with bad taste. I can't imagine EPDM tastes very good. The patch has been there for 6 years and still going strong.
 
Joined
Sep 14, 2018
Messages
576
Reaction score
94
Location
Georgia
Hardiness Zone
8
Country
United States
Sorry I misled you but what I meant is that the leak is somewhere around that level. I have no idea where the leak is.I planed to lower the water level past where the level stopped and paint all around the pond with a waterproof sealant.
 
Ad

Advertisements

Joined
Dec 16, 2017
Messages
4,504
Reaction score
3,566
Location
Ct
Hardiness Zone
6b
Country
United States
First question is what is your pond made from a liner? epdm ? Concrete?

FLEX SEAL is junk it is very week stuff and not great for ponds. i did use some but it was to block uv rays only
 
Joined
Jul 12, 2009
Messages
2,285
Reaction score
1,416
Location
Mount Pocono, Pennsylvania
Hardiness Zone
6a
Oh, I thought you found the source of the leak. Bummer. Those things can be hard to find.

In trying to locate the culprit, you might ask yourself how fast does the water escape? How many inches are lost within a certain period of time? If it's a lot, then it's probably a decent size hole which you should be able to locate by feeling around with your hand.

I guess you let it leak to the point where the leak stopped. As long as you are certain of this, you have most likely have nail it down to that level.

Are you sure it's not coming from any external hoses, piping, waterfall or skimmer? A large percentage of leaks develop around waterfalls.
 
Joined
Sep 14, 2018
Messages
576
Reaction score
94
Location
Georgia
Hardiness Zone
8
Country
United States
I have a auto fill system which refills 1 1/2 " in about 30min.
 
Joined
Dec 16, 2017
Messages
4,504
Reaction score
3,566
Location
Ct
Hardiness Zone
6b
Country
United States
If you shut down the pumps and get lucky enough to have no wind. you can drop leaves etc see where they head . You can feel the liner where your leak is the soil should be soft . They also have dies you can buy that show flow again for the pumps off.
 
Ad

Advertisements

Joined
Oct 28, 2013
Messages
10,455
Reaction score
10,754
Location
Northern IL
Showcase(s):
1
Ahhh... in that case, you may not have a leak in the pond itself at all. Your first stop should be the waterfall - that's where most "leaks" occur. Edges can get low, rocks can shift, etc. Turn it off for 24 hours and see what happens to your water level. If the water continues to drop at an excessive rate, then you may have a leak in the liner.

Next most likely spot is the plumbing, generally the connections. Check everything along your plumbing lines, looking for wet spots where you shouldn't have water.

LAST thing you should suspect is a leak in the actual liner. It's actually the least likely reason you would be losing water in your pond. But definitely don't go to all the trouble of sealing the liner because you THINK it's leaking.
 
Joined
Sep 14, 2018
Messages
576
Reaction score
94
Location
Georgia
Hardiness Zone
8
Country
United States
OK I did all of the above. I pulled the plug on all filters even the two aerators.I raised the water level higher than normal and again the level dropped down to the leak level in about 45Min. My plan was to first mark the leak level on the liner then empty and clean the liner and carefully look for the leak. If i can't find it i planed to use a waterproof sealer all around the leak level.
 
Joined
Dec 16, 2017
Messages
4,504
Reaction score
3,566
Location
Ct
Hardiness Zone
6b
Country
United States
How big is your pond that the water level dropped to where you think it's stopping / where the leak may be?.
At this level is there any plumbing .? skimmer? where the liners over lap? again look and also feel your way around as the leak should be softer then the rest of the pond
 
Joined
Oct 28, 2013
Messages
10,455
Reaction score
10,754
Location
Northern IL
Showcase(s):
1
Before you do that, carefully check around the edges of the pond - see if there are any low spots where water could just be escaping over the side. Even an area where water is being wicked out by a fold in the liner can result in significant and surprising amounts of water loss.

Just trying to save you some hard work. Like I said up there (y) an actual hole or tear in an EPDM liner is USUALLY not the cause of sudden water loss in an established pond. Generally you would know that something sharp - like a falling rock, someone walking in the pond stepping on sharp rocks or a even dog's claw struggling to get out after falling in - potentially caused a tear or maybe you know you had burrowing animals that could be chewing at the liner from the back or underside. Liners don't just rip or tear on their own - unless you have a construction issue where you had a stress point from a liner being stretched too tight up against something sharp, or something sharp hits that stretched liner.
 
Ad

Advertisements

Joined
Sep 14, 2018
Messages
576
Reaction score
94
Location
Georgia
Hardiness Zone
8
Country
United States
As you can see this is the water leak level.The normal level is just over the rock in yellow. You can see the leak level is below the top of the liner.
 

Attachments

brokensword

Not all those who wander are lost
Joined
Jun 22, 2011
Messages
1,220
Reaction score
952
Location
Michigan
Hardiness Zone
5b
Country
United States
@420benz you're going to have to do the hard work of actually pulling back your edge and looking for any low spot, if you suspect the pond is leaking. Have you confirmed no plumbing (you DO have plumbing else your wfall would not work) or wfall leak by turning them off, filling the pond, and waiting for final stop point? If this 2" lower level is where it stops, that's where you look, whether by pulling back the edge and inspecting or actually looking for a tear/rip/chew hole. Is your wfall totally lined underneath? Is the liner ONE liner or two? Does the pond liner, if separate, go up high enough under your wfall liner so as not to wick? Is your autofill system the level at which the water stops leaking? Maybe it's siphoning back? I'd not have such a system actually physically connected to the pond but instead, with an air gap between.
 
Ad

Advertisements

Joined
Sep 14, 2018
Messages
576
Reaction score
94
Location
Georgia
Hardiness Zone
8
Country
United States
I plan on doing all of the above in the spring. It is to cold now.
But thanks for all of the Great Info.
 

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.

Ask a Question

Similar Threads

Leaking pond help 3
Leaking galvanized steel fish pond. 9
Concrete pond leaking 16
Pond has two leaks 5
Pond Liner leaking 5
Advice please, Leaking Pond 26
Pond leaked out overnight 30
Pond has a leak ! What to do ? 10

Top