Cleck valve failure

[Silverni2]

Setting up a new build, my return will be half way down the tank, I keep hearing how check valves fail anyway to be super safe with using a check valve to prevent alot of water on my floor?
Thx

 

[skene]

uhhhhh........ what??????????

 

[Silverni2]

Maybe you should be specific on what you don't understand !

 

[Jaftica]

Maybe you should be specific on what you don't understand !

your whole post

 

[skene]

maybe you should learn how to properly explain what you are getting at.
When I went to school... one of the classes that I never remember was jibberish 101.

 

[rkaragozler]

I have seen the George Fisher Wye Check Valve used often, but I would still be careful

 

[Silverni2]

Ok if u both don't understand it must be me ! My new 120 will have to holes on both ends of the tank 1 for drain and the other for return. The returns will be half way down a 24" high tank. In case of a power outage, water backing up in the sump I will use a check valve int plumbing line inorder to stop water from returning into sump and overflowing the sump. I've heard that check valves are not reliable and sometimes do not do the job. Is there a failsafe inorder to prevent a flood?

 

[rkaragozler]

Ok if u both don't understand it must be me ! My new 120 will have to holes on both ends of the tank 1 for drain and the other for return. The returns will be half way down a 24" high tank. In case of a power outage, water backing up in the sump I will use a check valve int plumbing line inorder to stop water from returning into sump and overflowing the sump. I've heard that check valves are not reliable and sometimes do not do the job. Is there a failsafe inorder to prevent a flood?

IMO only failsafe is to have everything plump to the top.

 

[Jaftica]

check valves will fail!!

 

[skene]

Setting up a new build, my return will be half way down the tank, I keep hearing how check valves fail anyway to be super safe with using a check valve to prevent alot of water on my floor?
Thx

This was incomprehensible jibberish.

Now... from what you asked...
There is no sure bet that you will not get overflow due to a power outage. However, if you are oversize your sump, chances are the water will not pour over.
For example.
20g DT vs 5 gal sump. If power goes out... that 5 gal sump would not be able to contain the majority of any water that would be going back down the drain/return.
20g vs 15g. Since you would not be using the entire volume of 15g, it would catch any overflow.
20g vs 29g, over compensating with additional sump volume to prevent any overflow.

At this point you can also adjust return pipe above waterline so that in the event of an outage, once water drops at/below drain line additional water does not back flow through the return.

Understand? It's all about the setup. If you set yourself up for failure. Guaranteed failure will happen.

 

[Imbarrie]

There is a way if you absolutely have to have the drains halfway down.
Elbow them up behind the tank to the top then down to the sump. If you have a vent at the top you won't lock air but you will have an air break in the case of a power or pump loss.

 

[Widdy]

Using Locline for the return? You can run the Locline back up closer to the water surface...

 

[MO~IDOL]

I've been using check valve for the past 5 years due to space issue but never had a problem(may b I'm the lucky one...lol). I do clean them when ever I c coralline or algae build up.

I've seen few tanks had problem with it because they did not install it properly. they all have the same common problem using flexible PVC and tubing so the check valve was NOT stand up straight. when the power goes out the back siphon pressure are not strong enough to close the valve.

 

[Silverni2]

Thx guys, the best thing for me to do is have the return as high up as possible to avoid a possible flood !!
Rk thx for understanding me!!

 

[NewfiDog]

Drill a hole in the return for a siphon.