Mineral pool conversion

[Anthg]

I am converting my salt water pool to a mineral pool and was told to empty and clean the pool, replace the pressure valve and then fill the pool and add the mineral salt.
(It’s a small fully tiled pool with working pump, chlorination and cells)

I would rather not receive contradicting advice because I have already emptied and scrubbed the pool and bought the minerals. The question I have relates to the pressure valve. I can’t remove it. Can anyone tell me why replacing this would be important and if I can skip this step. Thanks!

[Denniswiseman]

I suspect you are talking about the hydrostatic relief valve
There is a seal in it which fails and it's considered good practice to replace it when drained down as the ground water could open it and it may not reseal
https://www.youtube.com/watch?v=HMvlJ1gW7uw