Possibly... but if the are jammed in there and the flow didn't push them out...
And kinda goes without saying but if you do try that route, use a NEW snake, not a used one. Not sure I'd try that myself - especially since we're just running on a theory. A set of experienced eyes and hands to rule out other possible causes first might be in order before doing something so drastic.
Are the standpipes glued in too? If not (they shouldn't be), I'd try pulling them out first, one at a time, and checking to see if they are obstructed. Typically the bulkhead is narrower than the pipe on those sorts of overflow pipes, so the obstruction may be on the topside, and pulling out the pipes and doing a visual inspection on those would be the first thing. If there's an obstruction there, that's a best case scenario, because if it got caught before going down through the bulkhead it will be a lot easier to clear manually, than if the clog is underneath.
And, if the obstruction is on the bottom side, it would be easier to feed something down to investigate, rather than going through the standpipe also - feed straight into the bulkhead and on down. The fun part will be getting to the overflows if they are on the back, particularly if you have a canopy and heavy lighting... but IMO that will still be easier than trying to fool with down below. I'd try topside first.
Of course you can always feed something up through the output, but that could possibly jam up whatever it might be even further... so I'd try to work with the flow - downward, if at all possible.
Jenn
And kinda goes without saying but if you do try that route, use a NEW snake, not a used one. Not sure I'd try that myself - especially since we're just running on a theory. A set of experienced eyes and hands to rule out other possible causes first might be in order before doing something so drastic.
Are the standpipes glued in too? If not (they shouldn't be), I'd try pulling them out first, one at a time, and checking to see if they are obstructed. Typically the bulkhead is narrower than the pipe on those sorts of overflow pipes, so the obstruction may be on the topside, and pulling out the pipes and doing a visual inspection on those would be the first thing. If there's an obstruction there, that's a best case scenario, because if it got caught before going down through the bulkhead it will be a lot easier to clear manually, than if the clog is underneath.
And, if the obstruction is on the bottom side, it would be easier to feed something down to investigate, rather than going through the standpipe also - feed straight into the bulkhead and on down. The fun part will be getting to the overflows if they are on the back, particularly if you have a canopy and heavy lighting... but IMO that will still be easier than trying to fool with down below. I'd try topside first.
Of course you can always feed something up through the output, but that could possibly jam up whatever it might be even further... so I'd try to work with the flow - downward, if at all possible.
Jenn