input needed on back flow valve

[mrcopitr]

Hi guys,

I want to install a back flow valve on my return from the sump...to prevent the little giant pump from a syphon action in case of power failure...the only little problem..is that I could only find a pvc back flow valve that as a small brass weight on the flap...would that be a problem...?????

Also I did receive a 100 pds of semi cured rock on the week end...and I still do not see any critters migrating in the DSB...any input on this would be appreciated...

Hoping to hear from you


Marco