1/4" from the bottom of the cistern sounds a tad tight, but not excessive. Just to make sure though... wedge a pencil between the cistern and the underside of the siphon and try flushing again. I'd just want to be sure the vacuum of the siphon isn't pulling the siphon up against the cistern floor.
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- Thread starter Old UKPF 123567
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We recommend City Plumbing Supplies, BES, and Plumbing Superstore for all plumbing supplies.
