i am thinking of doing away with the checkvalve and just drill a hole in my return to act as a siphon break. the question is can i drill it in the pvc tube that runs vertically in the overflow, or should i drill the hole in the locline that runs horizontally? either way, the hole will be right below the waterline.
does it make a difference where i drill it? it looks like it will be easier to drill the pvc, but i am not sure that will work, as the waterlevel in the overflow is below that of the main tank. some help pls.
does it make a difference where i drill it? it looks like it will be easier to drill the pvc, but i am not sure that will work, as the waterlevel in the overflow is below that of the main tank. some help pls.