Pesach Questions

We are supposed to not pour hot water in our sink for 24 hours before kashering (by pouring boiling water). During that waiting period, is it fine to store and wash chametz items in the sink using cold water? (This could work during Shabbat).

If I understand your question correctly, it is fine if you use the sink in the 24 hour period as long as the water is cold. Be very careful that no one uses the hot water faucet and also make sure that the sink is dry when you actually begin to kasher it. 

RATN