Mikvaot: Difference between revisions

# If a vessel that is susceptible to tumah is used to plug up a hole in the mikveh the entire mikveh is invalid because without that plug the mikveh would be invalid as the water would flow up and having the plug there is considered creating a mikveh with something that is susceptible to tumah.<ref>The Rash Mikvaot 5:5 explains that a plug that prevents water from exiting a mikveh that otherwise would be invalid as the water is flowing is invalid since the plug is considered like creating a mikveh with something that is susceptible to tumah. The Rosh Mikvaot 11 disagrees. Tur 201:50 explains that the Rosh argues that preventing water from escaping isn’t an issue, it is only an issue to gather water into a mikveh using something that is susceptible to tumah. Shulchan Aruch 201:50 cites both opinions.</ref>

# If a vessel that is susceptible to tumah is used to repair a mikveh when the mikveh is completely valid but without the repair there is a concern it will later become invalid, the mikveh is valid.<ref>The Nodeh Beyehuda 2:137 writes that if a mikveh is currently valid and there is a concern that water is being absorbed in the ground boards can be nailed down. If the nails are new then they aren’t susceptible to tumah since they are being used to service the ground from the beginning of their use. However, if they are old nails they are susceptible to tumah but nonetheless they can be used. His reason is that since the mikveh is currently valid continuing to keep it valid isn’t considered creating a mikveh with something that is susceptible to tumah.

===If Water is Attached to the Mikveh or Spring===