PVC Check Valve?

[mjsandbe]

I would like to add something to help prevent my sump overflowing in the event of a power failure. Do PVC Check Valves work in saltwater tanks? Any recommendations on the type and where to get them?

Michael S.

[hypertech]

Can you drill an anti-siphon hole in the return pipe high enough so that your sump can contain the water volume in a power failure?

[mjsandbe]

I have already experimented with that. I am not happy with how large of a hole I need to drill to actually break siphon and it tends to clog with algae over time. So if I could combine two methods of anti-siphon I would sleep better at night.

[MNGold15]

I got mine from Marine Depot: http://www.marinedepot.com/ps_AquariumPage~PageAlias~plumbing_parts_fittings_ ball_check_gate_valves.html

I have the true union 1.5" from there and it works great. I have only had it for about 4 months.

[Chris Goetz]

I have the same one, but I got it from AES. They work pretty well, but like anything, someone's brother knew someone that had one fail once...
I've had good luck with the siphon breaks and they have the added benefit of agitating the surface for the glimmer effect with the halides.

Chris

[Soltaker]

I'm using a Clear PVC Swing Check Valves and I like it plenty.

[mrbill]

I am using three different valves and non of them will completely shut off anymore. They do slow the flow down a little but its the anti-siphon air hole that breaks the siphon. The clear valve sounds like it may be easier to check and keep clean if you can keep the algae from growing on it. Be aware that the valves may restrict water flow so size accordingly if you use one. I have a feed timer on my tank that shuts off the main pump. This works great as it also lets me check that my anti-siphon measures are working every time I feed. PS: Clean the anti-siphon air holes regularly, cheap insurance.

[sea monkey]

if you want to stop over we have the higher quality wye check valves in stock, these will last way longer and require less cleaning . in a few days we will also have the cheaper ones that are mentioned above. Depending on how much water is at risk of dumping on your floor and how much damage it might cause , you might want to consider the wye valve .
http://www.twopartsolution.com/index.php?main_page=index&cPath=70_85
btw check valves are a nice option if you are unable to implement something else but none of them are fool proof.

[mjsandbe]

sea monkey PM sent