Task: change sand in pool filter
Assumptions:
Steps:
Multiport valve should be removed
Disassemble the hoses connected to the multiport valve
Safeguard the standpipe
Remove the sand
Rinse out the tank
Fill the pool halfway with water
Place new sand
Fill the pool
Reassemble the connections
Attach the backwash hose
Turn on the backwash until the filter s sight glass is running clear
Rinse the filter.