Rico,
On that Aquamedic top-off unit you will see those two hoses for the peristaltic portion of the pump. They tell you to grease the hose before use but what they don't tell you is that you need to heat up the hose in near boiling water to soften it up. There has been problems with that particular hose cracking after it has been put into service. Mine of course cracked while we were on vacation. Good thing my neighbor was observant.
I now use the Masterflex 96410-15 hose instead. This pump also has a hard time until the hose is malleable.
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