To Switch Back To Sand?

[zapata41]

yes i have had my check valve fail. it is a true union flapper type, the kind with no metal parts inside and is a translucent blue. it only took about 4mo for little deposits to build up on the seal for it, then when i powered off the pump to do some cleaning, also to simulate power failure, i noticed that the water level slowly would creep in the sump, then i noticed that the check valve failed. since i redisgned the plumbing not to need one.

Tim

 

[MiddletonMark]

<a href=showthread.php?s=&postid=7360313#post7360313 target=_blank>Originally posted</a> by Travis
I think the most redundant thing to do would be to drill a couple siphon break holes and also use a check valve. But both need to be maintained regularly or there will be a chance of failure.

Totally agree.

I use siphon break holes - but also have always kept one outlet in the tank near the water's surface so that at most the tank drains 1" ... not overflowing the sump.

Maintain everything important like that on your system [siphon break, clean pumps, clean intake screens, etc].

 

[Travis]

<a href=showthread.php?s=&postid=7360349#post7360349 target=_blank>Originally posted</a> by zapata41
yes i have had my check valve fail. it is a true union flapper type, the kind with no metal parts inside and is a translucent blue. it only took about 4mo for little deposits to build up on the seal for it, then when i powered off the pump to do some cleaning, also to simulate power failure, i noticed that the water level slowly would creep in the sump, then i noticed that the check valve failed. since i redisgned the plumbing not to need one.

Tim

Proved me wrong then. I was just beginning to feel that it might be a myth as I hear people saying "they will fail sooner or later" all the time but never hear any real experiences of them failing.

 

[Zaphod]

Add more random flow pointed at the bottom.