help with check valve

Is the pvc check vavles ok to use in reef , was thinking the rubber stopper mght corode from salt, are any made for saltwater and if so can some piont me in direction of where to buy?

 

Most hardware store carry the PVC..good to go... I have 3 : ) No worries.

 

Bulk reef Supply has good ones.

 

One problem with most 'normal' check valves is that they used metal parts for the flapper. I went with the BRS check vlave because I KNOW its reef safe.

 

AVOID CHECK VALVES LIKE THE PLAGUE !!!

Check valves have no place in a properly designed reef system, they are a false sense of security and can and will fail, guaranteed.

Why do you think you need a check valve? A properly designed overflow and return with an air gap completely eliminates the need for a check valve or drilled holes. As long as you provide sufficient freeboard or room in your sump and keep the retruns close to the surface so a very slight, easily calculated backflow amount exposes the returns to atmosphere you have the best foolproof return you could possibly want. Water cannot jump uphill!

 

Tell that to SALMON!

What?! Long day. I agree that check valves are not a great fail-safes to avoid 'tank-stand-hydration" but as a pilot I like to have a LOT of fail-safes and redundancy as long as it doesn't compromise the health or safety of my tank.

 

Check valves cause additional head loss so will rob the flow, they will also fail causing a flood. It does not have to be a catastrophic failure, even a grain of sand, a piece of algae or food, a baby snail etc will stop it from seating and flood over time in a power failure.
Bad bad idea and no additional safety factor at all, as I said before "false sense of security".

My 100G drains a maximum of 3.4 gallons back to my sump in a power outage before the returns are exposed to atmosphere abd cannot fail in any way shape or form. Check with your water utility and ask whet they require of a harardous materials water hook up, its an air gap, the best for of backflow prevention known to man. Nothing mechanical to fail and it cannot be defeated.

 

I was thinking of gate valve..big difference. my bad... off to the wood shed.