Abstract: The present specification discloses a pool overflow drain heightener that prevents pool water from draining through the pool overflow drain during normal usage, yet permits draining during an emergency overflow event. The pool overflow drain heightener includes a dam basin having an upper rim that defines a mouth configured to be positioned above the desired water level and above the lowest point of the pool overflow drain, such that the water level can temporarily or permanently rise above the lowest point, yet not drain from the pool. Excessive water levels will still be able drain through the mouth, and out the overflow drain, thereby preventing overflow of the pool.

Abstract: The present specification discloses a pool overflow drain heightener that prevents pool water from draining through the pool overflow drain during normal usage, yet permits draining during an emergency overflow event. The pool overflow drain heightener includes a dam basin having an upper rim that defines a mouth configured to be positioned above the desired water level and above the lowest point of the pool overflow drain, such that the water level can temporarily or permanently rise above the lowest point, yet not drain from the pool. Excessive water levels will still be able drain through the mouth, and out the overflow drain, thereby preventing overflow of the pool.