Filters - General questions

• I have re-opened my pool but my pressure gauge indicates a high pressure of 3 bars. What should I do ?

• How do I take the sand out of my filter ?

• I see water seeping out of the used water outlet of my valve when it is in the filtration position. What should I do ?

• How do I choose the right sand filter for my pool?

• Which type of pool filter should I choose ?