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  1. P

    Air in de filter when pupmp off

    Here's the set up: I have a filter with a multi-port valve, and a separation tank for back washing, with a check valve in between the sep tank and the return to the pool. When i filter, the check valve leaks water back into the sep tank which fills up to the top. The pipe leading from the...
  2. P

    DE

    Why does a given community stipulate that backwashed DE goes to a separation tank and not to their sewers? Can I just waste the backwashed DE onto my property? Isn't DE biodegradable?
  3. P

    Waste setting on Multi-valve port

    I have a DE filter with a separation tank and no dedicated waste pipe. If I want to vacuum the pool what setting should I put the multi-port valve to? Which pipe can I use for the waste outlet?