Whrn back washing, why doesn't the sand wash out when doing a back wash?
What speed should I run my VS pump when running backwash? I've read that full speed is required to lift the sand but wouldn't that wash out the sand down the drain?
Squib
What speed should I run my VS pump when running backwash? I've read that full speed is required to lift the sand but wouldn't that wash out the sand down the drain?
Squib