Heh Heh !! Matt didn't mention that getting the sand out can be a dog. I have a 300# Hayward and used a shop-vac to suck the stuff out after draining the water. A dog because you have to dump the vac often as it gets heavy real fast. The laterals on the Hayward folded so you can remove the entire center assembly. When you put the sand back they recommend filling the filter halfway or so with water so dumping in the sand won't stress the laterals.
Al
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